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Quantum Coherence And Magnetism In Bosonic And Fermionic Gases Of Ultracold Atoms

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Quantum Coherence and Magnetism in Bosonic and Fermionic Gases of Ultracold Atoms

Quantum Coherence and Magnetism in Bosonic and Fermionic Gases of Ultracold Atoms Book
Author : Gyu-Boong Jo,Massachusetts Institute of Technology. Department of Physics
Publisher : Unknown
Release : 2010
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

In this thesis, two sets of experimental studies in bosonic and fermionic gases are described. In the first part of the thesis, itinerant ferromagnetism was studied in a strongly interacting Fermi gas of ultracold atoms. The observation of nonmonotonic behavior of lifetime, kinetic energy, and size for increasing repulsive interactions provides strong evidence for a phase transition to a ferromagnetic state. Our observations imply that itinerant ferromagnetism of delocalized fermions is possible without lattice and band structure, and our data validate the most basic model for ferromagnetism introduced by Stoner. In the second part of the thesis, the coherence properties of a Bose-Einstein condensate (BEC) was studied in a radio frequency induced double-well potential implemented on a microfabricated atom chip. We observed phase coherence between the separated condensates for times up to 200 ms after splitting, a factor of 10 longer than the phase diffusion time expected for a coherent state for our experimental conditions. The enhanced coherence time is attributed to number squeezing of the initial state by a factor of 10. Furthermore, the effect of phase fluctuations on an atom interferometer was studied in an elongated BEC. We demonstrated that the atom interferometer using the condensates is robust against phase fluctuations; i.e., the relative phase of the split condensates is reproducible despite axial phase fluctuations. Finally, phase-sensitive recombination of two BECs was demonstrated on an atom chip. The recombination was shown to result in heating, caused by the dissipation of dark solitons, which depends on the relative phase of the two condensates. This heating reduces the number of condensate atoms and provides a robust way to read out the phase.

Ultracold Bosonic and Fermionic Gases

Ultracold Bosonic and Fermionic Gases Book
Author : Kathy Levin,Alexander Fetter,Dan Stamper-Kurn
Publisher : Elsevier
Release : 2012-11-15
ISBN : 0444538623
Language : En, Es, Fr & De

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Book Description :

The rapidly developing topic of ultracold atoms has many actual and potential applications for condensed-matter science, and the contributions to this book emphasize these connections. Ultracold Bose and Fermi quantum gases are introduced at a level appropriate for first-year graduate students and non-specialists such as more mature general physicists. The reader will find answers to questions like: how are experiments conducted and how are the results interpreted? What are the advantages and limitations of ultracold atoms in studying many-body physics? How do experiments on ultracold atoms facilitate novel scientific opportunities relevant to the condensed-matted community? This volume seeks to be comprehensible rather than comprehensive; it aims at the level of a colloquium, accessible to outside readers, containing only minimal equations and limited references. In large part, it relies on many beautiful experiments from the past fifteen years and their very fruitful interplay with basic theoretical ideas. In this particular context, phenomena most relevant to condensed-matter science have been emphasized. Introduces ultracold Bose and Fermi quantum gases at a level appropriate for non-specialists Discusses landmark experiments and their fruitful interplay with basic theoretical ideas Comprehensible rather than comprehensive, containing only minimal equations

From Atom Optics to Quantum Simulation

From Atom Optics to Quantum Simulation Book
Author : Sebastian Will
Publisher : Springer Science & Business Media
Release : 2012-12-15
ISBN : 3642336337
Language : En, Es, Fr & De

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Book Description :

This thesis explores ultracold quantum gases of bosonic and fermionic atoms in optical lattices. The highly controllable experimental setting discussed in this work, has opened the door to new insights into static and dynamical properties of ultracold quantum matter. One of the highlights reported here is the development and application of a novel time-resolved spectroscopy technique for quantum many-body systems. By following the dynamical evolution of a many-body system after a quantum quench, the author shows how the important energy scales of the underlying Hamiltonian can be measured with high precision. This achievement, its application, and many other exciting results make this thesis of interest to a broad audience ranging from quantum optics to condensed matter physics. A lucid style of writing accompanied by a series of excellent figures make the work accessible to readers outside the rapidly growing research field of ultracold atoms.

From Atomic to Mesoscale

From Atomic to Mesoscale Book
Author : Svetlana A Malinovskaya,Irina Novikova
Publisher : World Scientific
Release : 2015-06-29
ISBN : 9814678716
Language : En, Es, Fr & De

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Book Description :

This volume presents the latest advancements and future developments of atomic, molecular and optical (AMO) physics and its vital role in modern sciences and technologies. The chapters are devoted to studies of a wide range of quantum systems, with an emphasis on understanding of quantum coherence and other quantum phenomena originated from light-matter interactions. The book intends to survey the current research landscape and to highlight major scientific trends in AMO physics as well as those interfacing with interdisciplinary sciences. The volume may be particularly useful for young researchers working on establishing their scientific interests and goals. Contents:Collective Phenomena and Long-Range Interactions in Ultracold Atoms and Molecules:Quantum Magnetism with Ultracold Molecules (M L Wall, K R A Hazzard and A M Rey)Optical Manipulation of Light Scattering in Cold Atomic Rubidium (R G Olave, A L Win, K Kemp, S J Roof, S Balik, M D Havey, I M Sokolov and D V Kupriyanov)Seeing Spin Dynamics in Atomic Gases (D M Stamper-Kurn)Atom-like Coherent Solid State Systems:Precision Magnetic Sensing and Imaging Using NV-Diamond (R L Walsworth)Entanglement and Quantum Optics with Quantum Dots (A P Burgers, J R Schaibley and D G Steel)Coherent Nanophotonics and Plasmonics:Enhancement of Single-Photon Sources with Metamaterials (M Y Shalaginov, S Bogdanov, V V Vorobyov, A S Lagutchev, A V Kildishev, A V Akimov, A Boltassevaand V M Shalaev)Linear Optical Properties of Periodic Hybrid Materials at Oblique Incidence: A Numerical Approach (A Blake and M Sukharev)Fundamental Physics:An Introduction to Boson-Sampling (B T Gard, K R Motes, J P Olson, P P Rohde and J P Dowling)New Approach to Quantum Amplification by Superradiant Emission of Radiation (G Shchedrin, Y Rostovtsev, X Zhang and M O Scully)Ultrafast Dynamics in Strong Laser Fields:Circularly Polarized Attosecond Pulses and Molecular Atto-Magnetism (A D Bandrauk and K-J Yuan)Many-Electron Response of Gas-Phase Fullerene Materials to Ultraviolet and Soft X-ray Photons (H S Chakraborty and M Magrakvelidze)Ultracold Chemistry:Collisions and Reactions in Ultracold Gases (N Balakrishnan and J Hazra) Readership: For professional researchers as well as young academics in the field of Atomic, Molecular and Optical (AMO) physics. Key Features:The contributors for this volume are all internationally recognized experts in their fieldsThis book offers a unique overview of the state of current AMO physics, while outlining future directions. No comparable titles have been identified so far (by editors or by reviewers)All contributions include new unpublished research, and will be of interest for anyone pursuing the scientific investigations in the presented areasKeywords:Quantum Coherence;Amo;Atomic Physics;Quantum Control;Ultracold Atoms;Ultracold Molecules;Nv-diamonds;Quantum Dots;Quantum Magnetism;Nanophotonics;Plasmonics;Ultrafast Dynamics;Ultracold Chemistry

Quantum Information and Coherence

Quantum Information and Coherence Book
Author : Erika Andersson,Patrik Öhberg
Publisher : Springer
Release : 2014-07-08
ISBN : 3319040634
Language : En, Es, Fr & De

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Book Description :

This book offers an introduction to ten key topics in quantum information science and quantum coherent phenomena, aimed at graduate-student level. The chapters cover some of the most recent developments in this dynamic research field where theoretical and experimental physics, combined with computer science, provide a fascinating arena for groundbreaking new concepts in information processing. The book addresses both the theoretical and experimental aspects of the subject, and clearly demonstrates how progress in experimental techniques has stimulated a great deal of theoretical effort and vice versa. Experiments are shifting from simply preparing and measuring quantum states to controlling and manipulating them, and the book outlines how the first real applications, notably quantum key distribution for secure communication, are starting to emerge. The chapters cover quantum retrodiction, ultracold quantum gases in optical lattices, optomechanics, quantum algorithms, quantum key distribution, quantum control based on measurement, orbital angular momentum of light, entanglement theory, trapped ions and quantum metrology, and open quantum systems subject to decoherence. The contributing authors have been chosen not just on the basis of their scientific expertise, but also because of their ability to offer pedagogical and well-written contributions which will be of interest to students and established researchers.

Quantum Gas Experiments Exploring Many body States

Quantum Gas Experiments  Exploring Many body States Book
Author : Torma Paivi,Sengstock Klaus
Publisher : World Scientific
Release : 2014-09-16
ISBN : 1783264772
Language : En, Es, Fr & De

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Book Description :

Quantum phenomena of many-particle systems are fascinating in their complexity and are consequently not fully understood and largely untapped in terms of practical applications. Ultracold gases provide a unique platform to build up model systems of quantum many-body physics with highly controlled microscopic constituents. In this way, many-body quantum phenomena can be investigated with an unprecedented level of precision, and control and models that cannot be solved with present day computers may be studied using ultracold gases as a quantum simulator.This book addresses the need for a comprehensive description of the most important advanced experimental methods and techniques that have been developed along with the theoretical framework in a clear and applicable format. The focus is on methods that are especially crucial in probing and understanding the many-body nature of the quantum phenomena in ultracold gases and most topics are covered both from a theoretical and experimental viewpoint, with interrelated chapters written by experts from both sides of research.Graduate students and post-doctoral researches working on ultracold gases will benefit from this book, as well as researchers from other fields who wish to gain an overview of the recent fascinating developments in this very dynamically evolving field. Sufficient level of both detailed high level research and a pedagogical approach is maintained throughout the book so as to be of value to those entering the field as well as advanced researchers. Furthermore, both experimentalists and theorists will benefit from the book; close collaboration between the two are continuously driving the field to a very high level and will be strengthened to continue the important progress yet to be made in the field.

Ultra cold Fermi Gases

Ultra cold Fermi Gases Book
Author : M. Inguscio,W. Ketterle,C. Salomon
Publisher : IOS Press
Release : 2008-04-18
ISBN : 1607503182
Language : En, Es, Fr & De

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Book Description :

The field of cold atomic gases faced a revolution in 1995 when Bose-Einstein condensation was achieved. Since then, there has been an impressive progress, both experimental and theoretical. The quest for ultra-cold Fermi gases started shortly after the 1995 discovery, and quantum degeneracy in a gas of fermionic atoms was obtained in 1999. The Pauli exclusion principle plays a crucial role in many aspects of ultra-cold Fermi gases, including inhibited interactions with applications to precision measurements, and strong correlations. The path towards strong interactions and pairing of fermions opened up with the discovery in 2003 that molecules formed by fermions near a Feshbach resonance were surprisingly stable against inelastic decay, but featured strong elastic interactions. This remarkable combination was explained by the Pauli exclusion principle and the fact that only inelastic collisions require three fermions to come close to each other. The unexpected stability of strongly interacting fermions and fermion pairs triggered most of the research which was presented at this summer school. It is remarkable foresight (or good luck) that the first steps to organize this summer school were already taken before this discovery. It speaks for the dynamics of the field how dramatically it can change course when new insight is obtained. The contributions in this volume provide a detailed coverage of the experimental techniques for the creation and study of Fermi quantum gases, as well as the theoretical foundation for understanding the properties of these novel systems.

Ultracold Atoms in Optical Lattices

Ultracold Atoms in Optical Lattices Book
Author : Maciej Lewenstein,Anna Sanpera,Verònica Ahufinger
Publisher : Oxford University Press
Release : 2012-03-08
ISBN : 0199573123
Language : En, Es, Fr & De

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Book Description :

This book explores the physics of atoms frozen to ultralow temperatures and trapped in periodic light structures. It introduces the reader to the spectacular progress achieved on the field of ultracold gases and describes present and future challenges in condensed matter physics, high energy physics, and quantum computation.

Quantum Nonlinear Optics

Quantum Nonlinear Optics Book
Author : Eiichi Hanamura,Yutaka Kawabe,Akio Yamanaka
Publisher : Springer Science & Business Media
Release : 2007-07-04
ISBN : 3540684840
Language : En, Es, Fr & De

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Book Description :

This graduate-level textbook gives an introductory overview of the fundamentals of quantum nonlinear optics. It deals with the organization of radiation field, interaction between electronic system and radiation field, statistics of light, and mutual manipulation of light and matter. It also covers laser oscillation, dynamics of light, nonlinear optical response, and nonlinear spectroscopy, as well as ultrashort and ultrastrong laser pulse. In addition, latest results of the frontier of this science are presented. Problems and solutions help the reader to master and review the material.

Gas Di Fermi Ultrafreddi

Gas Di Fermi Ultrafreddi Book
Author : M. Inguscio,Wolfgang Ketterle,Christophe Salomon,Società italiana di fisica
Publisher : IOS Press
Release : 2007-01-01
ISBN : 158603846X
Language : En, Es, Fr & De

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Book Description :

The field of cold atomic gases faced a revolution in 1995 when Bose-Einstein condensation was achieved. Since then, there has been an impressive progress, both experimental and theoretical. The quest for ultra-cold Fermi gases started shortly after the 1995 discovery, and quantum degeneracy in a gas of fermionic atoms was obtained in 1999. The Pauli exclusion principle plays a crucial role in many aspects of ultra-cold Fermi gases, including inhibited interactions with applications to precision measurements, and strong correlations. The path towards strong interactions and pairing of fermions opened up with the discovery in 2003 that molecules formed by fermions near a Feshbach resonance were surprisingly stable against inelastic decay, but featured strong elastic interactions. This remarkable combination was explained by the Pauli exclusion principle and the fact that only inelastic collisions require three fermions to come close to each other. The unexpected stability of strongly interacting fermions and fermion pairs triggered most of the research which was presented at this summer school. It is remarkable foresight (or good luck) that the first steps to organize this summer school were already taken before this discovery. It speaks for the dynamics of the field how dramatically it can change course when new insight is obtained. The contributions in this volume provide a detailed coverage of the experimental techniques for the creation and study of Fermi quantum gases, as well as the theoretical foundation for understanding the properties of these novel systems.

Many Body Physics with Ultracold Gases

Many Body Physics with Ultracold Gases Book
Author : Christophe Salomon,Georgy V. Shlyapnikov,Leticia F. Cugliandolo
Publisher : Oxford University Press
Release : 2013
ISBN : 019966188X
Language : En, Es, Fr & De

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Book Description :

This book provides authoritative tutorials on the most recent achievements in the field of quantum gases at the interface between atomic physics and quantum optics, condensed matter physics, nuclear and high-energy physics, non-linear physics, and quantum information.

Quantum Communication and Information Technologies

Quantum Communication and Information Technologies Book
Author : Alexander S. Shumovsky,Valery I. Rupasov
Publisher : Springer Science & Business Media
Release : 2012-12-06
ISBN : 9401001715
Language : En, Es, Fr & De

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Book Description :

Remarkable recent developments in the field of quantum communications and quantum information processing include the achievement of quantum teleportation, quantum communication channels based on entangled states, and the discovery of quantum computing algorithms. The present book addresses the physical foundations of the subject, as well as the technological problems, discussing such aspects as photonics, quantum imaging, engineered entanglement in atomic and other physical systems, Bose-Einstein condensation, and decoherence. Indispensable reading for graduates and Ph.D. students in departments of physics, electrical and electronic engineering, mathematics, and computer science seeking both an orientation as well as advanced training in the field.

Quantum Physics of Light and Matter

Quantum Physics of Light and Matter Book
Author : Luca Salasnich
Publisher : Springer
Release : 2017-02-24
ISBN : 3319529986
Language : En, Es, Fr & De

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Book Description :

This compact but exhaustive textbook, now in its significantly revised and expanded second edition, provides an essential introduction to the field quantization of light and matter with applications to atomic physics and strongly correlated systems. Following an initial review of the origins of special relativity and quantum mechanics, individual chapters are devoted to the second quantization of the electromagnetic field and the consequences of light field quantization for the description of electromagnetic transitions. The spin of the electron is then analyzed, with particular attention to its derivation from the Dirac equation. Subsequent topics include the effects of external electric and magnetic fields on the atomic spectra and the properties of systems composed of many interacting identical particles. The book also provides a detailed explanation of the second quantization of the non-relativistic matter field, i.e., the Schrödinger field, which offers a powerful tool for the investigation of many-body problems, and of atomic quantum optics and entanglement. Finally, two new chapters introduce the finite-temperature functional integration of bosonic and fermionic fields for the study of macroscopic quantum phenomena: superfluidity and superconductivity. Several solved problems are included at the end of each chapter, helping readers put into practice all that they have learned.

Quantum World Of Ultra cold Atoms And Light The Book Iii Ultra cold Atoms

Quantum World Of Ultra cold Atoms And Light  The   Book Iii  Ultra cold Atoms Book
Author : Gardiner Crispin W,Zoller Peter
Publisher : World Scientific
Release : 2017-09-07
ISBN : 178634419X
Language : En, Es, Fr & De

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Book Description :

Download Quantum World Of Ultra cold Atoms And Light The Book Iii Ultra cold Atoms book written by Gardiner Crispin W,Zoller Peter, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Foundations of Quantum Mechanics in the Light of New Technology

Foundations of Quantum Mechanics in the Light of New Technology Book
Author : Anonim
Publisher : Unknown
Release : 2022-07-06
ISBN : 9814467030
Language : En, Es, Fr & De

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Book Description :

Download Foundations of Quantum Mechanics in the Light of New Technology book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Cold and Ultracold Molecules

Cold and Ultracold Molecules Book
Author : Philip Earis
Publisher : Royal Society of Chemistry
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"There have been enormous recent advances in our ability to produce and trap samples of translationally cold molecules (below 1 K) and ultracold molecules (below 1 mK). Molecules such as NH3, OH and NH have been cooled from room temperature to the milliKelvin regime by a variety of methods including buffer-gas cooling and Stark deceleration. Molecules have also been produced in ultracold atomic gases by photoassociation and magnetoassociation of pairs of atoms. Bose-Einstein condensates have been produced for dimers of both bosonic and fermionic alkali metal atoms, and the first signatures of ultracold triatomic and tetraatomic molecules have been observed. The new capabilities open up many exciting prospects, including: the study of collision processes in unprecedented detail using cooled or velocity-controlled species; the use of cold molecules in high-precision measurement to observe fundamentally important quantities; the production of quantum gases of dipolar molecules, which would exhibit many new properties; the use of cold molecules as qubits in quantum computing; and controlled ultracold chemistry, in which controlled chemical changes are achieved coherently for large samples using external fields."--Publisher's description.

Laser Spectroscopy

Laser Spectroscopy Book
Author : Peter Hannaford,Andrei Sidorov,Hans Bachor,Ken Baldwin
Publisher : World Scientific
Release : 2004-02-13
ISBN : 9814483958
Language : En, Es, Fr & De

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Book Description :

This volume comprises a collection of invited and selected contributions presented at the 16th International Conference on Laser Spectroscopy in Palm Cove, Queensland, Australia, 13–18 July 2003. The papers report the latest and most exciting developments in laser spectroscopy and related areas: new ultra-precise spectroscopic measurements based on optical frequency combs including tests of the stability of the fundamental constants; the first realization of Bose–Einstein condensation in cesium and ytterbium; the behavior of ultra-cold bosons and fermions in optical lattices; the production of ultra-cold cesium, helium and fermionic lithium molecules; the production and coherent transport of ultra-cold atoms in microtraps on the surface of chips; the implementation of one- and two-qubit quantum algorithms and experiments towards a scalable quantum computer based on trapped ions; and new medical applications of laser spectroscopy. The proceedings have been selected for coverage in: • Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings) • Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings) • CC Proceedings — Engineering & Physical Sciences Contents: Precision SpectroscopyUltrafast SpectroscopyQuantum Degenerate GasesCold Molecules and Cold collisionsAtom Optics and InterferometryCavity QEDQuantum Optics and Quantum InformationNovel Applications and New Laser SourcesMedical Applications Readership: Researchers and graduate students in the fields of laser spectroscopy, atomic and molecular physics, atom optics, quantum gases and quantum information. Keywords:Laser Spectroscopy;Precision Spectroscopy;Quantum Degenerate Gases;Quantum Information;Atom Optics;Quantum Optics

Laser Spectroscopy

Laser Spectroscopy Book
Author : Peter Hannaford
Publisher : World Scientific
Release : 2004
ISBN : 9812703004
Language : En, Es, Fr & De

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Book Description :

This volume comprises a collection of invited and selected contributions presented at the 16th International Conference on Laser Spectroscopy in Palm Cove, Queensland, Australia, 13OCo18 July 2003. The papers report the latest and most exciting developments in laser spectroscopy and related areas: new ultra-precise spectroscopic measurements based on optical frequency combs including tests of the stability of the fundamental constants; the first realization of BoseOCoEinstein condensation in cesium and ytterbium; the behavior of ultra-cold bosons and fermions in optical lattices; the production of ultra-cold cesium, helium and fermionic lithium molecules; the production and coherent transport of ultra-cold atoms in microtraps on the surface of chips; the implementation of one- and two-qubit quantum algorithms and experiments towards a scalable quantum computer based on trapped ions; and new medical applications of laser spectroscopy. The proceedings have been selected for coverage in: . OCo Index to Scientific & Technical Proceedings- (ISTP- / ISI Proceedings). OCo Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings). OCo CC Proceedings OCo Engineering & Physical Sciences."

Artificial Gauge Fields with Ultracold Atoms in Optical Lattices

Artificial Gauge Fields with Ultracold Atoms in Optical Lattices Book
Author : Monika Aidelsburger
Publisher : Springer
Release : 2015-12-14
ISBN : 331925829X
Language : En, Es, Fr & De

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Book Description :

This work reports on the generation of artificial magnetic fields with ultracold atoms in optical lattices using laser-assisted tunneling, as well as on the first Chern-number measurement in a non-electronic system. It starts with an introduction to the Hofstadter model, which describes the dynamics of charged particles on a square lattice subjected to strong magnetic fields. This model exhibits energy bands with non-zero topological invariants called Chern numbers, a property that is at the origin of the quantum Hall effect. The main part of the work discusses the realization of analog systems with ultracold neutral atoms using laser-assisted-tunneling techniques both from a theoretical and experimental point of view. Staggered, homogeneous and spin-dependent flux distributions are generated and characterized using two-dimensional optical super-lattice potentials. Additionally their topological properties are studied via the observation of bulk topological currents. The experimental techniques presented here offer a unique setting for studying topologically non-trivial systems with ultracold atoms.

Advances in Atomic Molecular and Optical Physics

Advances in Atomic  Molecular  and Optical Physics Book
Author : Anonim
Publisher : Academic Press
Release : 2011-08-09
ISBN : 9780080554907
Language : En, Es, Fr & De

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Book Description :

Volume 55 of the Advances in Atomic, Molecular, and Optical Physics Series contains seven contributions, covering a diversity of subject areas in atomic, molecular and optical physics. In their contribution, Stowe, Thorpe, Pe’er, Ye, Stalnaker, Gerginov, and Diddams explore recent developments in direct frequency comb spectroscopy. Precise phase coherence among successive ultrashort pulses of a frequency comb allows one to probe fast dynamics in the time domain and high-resolution structural information in the frequency domain for both atoms and molecules. The authors provide a detailed review of some of the current applications that exploit the unique features of frequency comb spectroscopy and discuss its future directions. Yurvsky, Olshanii and Weiss review theory and experiment of elongated atom traps that confine ultracold gases in a quasi-one-dimensional regime. Under certain conditions, these quasi-one-dimensional gases are well-described by integrable one-dimensional many-body models with exact quantum solutions. Thermodynamic and correlation properties of one such model that has been experimentally realized are reviewed. DePaola, Morgenstein and Andersen discuss magneto-optical trap recoil ion momentum spectroscopy (MOTRIMS), exploring collisions between a projectile and target resulting in charged target fragments. MOTRIMS combines the technology of laser cooling and trapping of target atoms with the momentum analysis of the charged fragments that recoil from the target. The authors review the different MOTRIMS experimental approaches and the spectroscopic and collisional investigations performed so far. Safronova and Johnson give an overview of atomic many-body perturbation theory and discuss why extensions of the theory are needed. They present “all-order results based on a linearized version of coupled cluster expansions and apply the theory to calculations of energies, transition matrix elements and hyperfine constants. Another contribution on atomic theory, authored by Fischer, explores the advantages of expanding the atomic radial wave functions in a B-spline basis. The differential equations are replaced by non-linear systems of equations and the problems of orthogonality requirements can be dealt with using projection operators. Electron-ion collisional processes are analyzed by Mueller, including descriptions of the experimental techniques needed to obtain cross section data and typical values for these cross sections. The present status of the field is discussed in relation to the detailed cross sections and rate coefficients that are needed for understanding laboratory or astrophysical plasmas. Finally, Duan and Monroe review ways to achieve scalable and robust quantum communication, state engineering, and quantum computation. Using radiation and atoms, ions, or atomic ensembles, they show that they can construct scalable quantum networks that are inherently insensitive to noise. Progress in experimental realization of their proposals is outlined. International experts Comprehensive articles New developments