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Spin Orbit Coupled Bose Gases
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Book Synopsis Spin-orbit Coupled Bose Gases by : Boris Shteynas
Download or read book Spin-orbit Coupled Bose Gases written by Boris Shteynas and published by . This book was released on 2019 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum simulation is a very active and growing field. Various quantum systems can be used to emulate existing materials in an accurate and controllable way, as well as to generate new states of matter that have not been found in the real world but the existence of which does not contradict the fundamental laws of physics. Ultracold atoms form a perfect system to realize idealized models and study physical mechanisms that stand out clearly in them. Recent efforts have been made to simulate artificial gauge fields with ultracold atoms, including spin-dependent gauge fields, such as spin-orbit coupling. Motivated by this goal our lab explored several approaches to generate a one-dimensional spinorbit coupling interaction, which has a rich phase diagram and plays an important role for topological insulators, the quantum spin Hall effect and spintronics. The first method we developed allowed us to detect a stripe phase by dressing Bose-Einstein condensates with an optical superlattice and Raman beams. The observed density modulation in the ground state meets the definition of the long-awaited supersolid state of matter. The second approach we took was to generate spin-orbit coupling without use of lasers. The method is based on the idea of periodic driving of the quantum system and dressing its evolution with fast micromotion, often refered to as Floquet engineering. Our experiment provided an insightful pedagogical example of what Floquet engineering is capable of. In the experiment we endowed a low energy radio-frequency photon with tunable momentum. When dressed with recoil momentum, the interaction of a radio-frequency photon with an atom occurred in a Doppler-sensitive way. We also demonstrated how to tune the momentum and flip its direction. In this thesis, I first describe the experiments done in the optical superlattice. Then I discuss the behavior of periodically driven classical and quantum systems and provide detailed analysis of how a radio-frequency photon can be magnetically dressed with tunable momentum. The experiments we carried out demonstrated novel methods of generation for spin-dependent gauge fields and showed pedagogical examples and interpretations of evolution of periodically driven systems. The scheme of periodically driven atoms inspired a theoretical study of heating in Floquet systems.
Book Synopsis Synthetic Spin-orbit Coupling In Cold Atoms by : Wei Zhang
Download or read book Synthetic Spin-orbit Coupling In Cold Atoms written by Wei Zhang and published by World Scientific. This book was released on 2018-07-25 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a review volume covering a wide range of topics in this newly developed research field. The intended audience corresponds to graduate students, post-docs and colleagues working in the field of cold atomic gases. This is the first review volume dedicated to this active research frontier, and provides a comprehensive and pedagogical summary of recent progresses in the field.
Book Synopsis Spin-orbit Coupling and Strong Correlations in Ultracold Bose Gases by : William S. Cole
Download or read book Spin-orbit Coupling and Strong Correlations in Ultracold Bose Gases written by William S. Cole and published by . This book was released on 2014 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the final Chapter, I address a problem which perhaps seems, at first glance, to be unrelated to bosons with Rashba SOC. The problem is identifying the ground states of spinless hardcore bosons on a frustrated honeycomb lattice. The connection between these problems is the delicate question of how bosons condense in a flat band. In that section I provide numerical support to a recently proposed scenario of "statistical transmutation," where an approximate ground state of the hard core bosons can be obtained from a mean-field approximation in terms of composite fermions.
Book Synopsis Spin-orbit Coupling and Supersolidity in Ultracold Quantum Gases by : Junru Li (Ph. D.)
Download or read book Spin-orbit Coupling and Supersolidity in Ultracold Quantum Gases written by Junru Li (Ph. D.) and published by . This book was released on 2019 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultracold quantum gases provide a clean, isolated, and controllable platform for simulating and characterizing complex physical phenomena. In this thesis, I present several experiments on realizing one-dimensional spin-orbit coupling in ultracold 23Na gases and the creation of a new form of matter with supersolid properties using interacting spin-orbit coupled Bose-Einstein condensates. The first part describes the realization of spin-orbit coupling in optical superlattices which consist of stack of pancakes of imbalanced double-wells. The orbital levels, individual pancakes, in an superlattice potential are used as pseudospin states. Spinorbit coupling was induced by two-photon Raman transition between the pseudospin states, and was experimentally characterized by the spin-dependent momentum structure from this dressing. The realization suppresses heating due to spontaneous emission. The system is highly miscible, allowing the study of novel phases in interacting spin-orbit coupled systems. Next, spin-orbit coupling was demonstrated by synchronizing a fast periodically modulating magnetic force with the Radio-Frequency (RF) pulses. The modulation effectively dressed the RF photons with tunable momentum. The consequent Doppler shifts for RF transitions were observed as velocity-selective spin flips. The scheme is equivalent to Floquet engineered one-dimensional spin-orbit coupling. Finally, I report experiments on creating a new form of matter, a supersolid, in ultracold quantum gases. An interacting spin-orbit coupled Bose-Einstein condensate in the stripe phase spontaneously breaks two continuous symmetries : the U(1) symmetry, observed as sharp interference peaks in momentum space, and the continuous translational symmetry, observed as a spontaneously formed density modulation. The density modulation is measured and characterized with Bragg scattering. A system spontaneously breaking these two symmetries is a crystal and a superfluid simultaneously, and is considered as a supersolid.
Author :Panayotis G. Kevrekidis Publisher :Springer Science & Business Media ISBN 13 :3540735917 Total Pages :398 pages Book Rating :4.5/5 (47 download)
Book Synopsis Emergent Nonlinear Phenomena in Bose-Einstein Condensates by : Panayotis G. Kevrekidis
Download or read book Emergent Nonlinear Phenomena in Bose-Einstein Condensates written by Panayotis G. Kevrekidis and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, written by experts in the fields of atomic physics and nonlinear science, covers the important developments in a special aspect of Bose-Einstein condensation, namely nonlinear phenomena in condensates. Topics covered include bright, dark, gap and multidimensional solitons; vortices; vortex lattices; optical lattices; multicomponent condensates; mathematical methods/rigorous results; and the beyond-the-mean-field approach.
Download or read book Quantum Gases written by Nick Proukakis and published by World Scientific. This book was released on 2013 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a broad overview of the principal theoretical techniques applied to non-equilibrium and finite temperature quantum gases. Covering Bose-Einstein condensates, degenerate Fermi gases, and the more recently realised exciton-polariton condensates, it fills a gap by linking between different methods with origins in condensed matter physics, quantum field theory, quantum optics, atomic physics, and statistical mechanics.
Book Synopsis Vortices in a Rotating Spin-Orbit-Coupled Bose—Einstein Condensate Under Extreme Elongation in a Harmonic Plus Quartic Trap*Supported by the National Natural Science Fund for National Major Scientific Research Equipment and Equipment Special Fund Under Grant No. 61025023, the NMFSEID Under Grant No. 61127901, the Key Project Fund of the CAS "Light of West China" Program Under Grant No. 2012ZD02, the Youth Innovation Promotion Association of CAS Under Grant No. 2015334, and the Sichuan Province Education Department Key Natural Science Fund Under Grant Nos. 13ZA0149 and 16ZA0355 by :
Download or read book Vortices in a Rotating Spin-Orbit-Coupled Bose—Einstein Condensate Under Extreme Elongation in a Harmonic Plus Quartic Trap*Supported by the National Natural Science Fund for National Major Scientific Research Equipment and Equipment Special Fund Under Grant No. 61025023, the NMFSEID Under Grant No. 61127901, the Key Project Fund of the CAS "Light of West China" Program Under Grant No. 2012ZD02, the Youth Innovation Promotion Association of CAS Under Grant No. 2015334, and the Sichuan Province Education Department Key Natural Science Fund Under Grant Nos. 13ZA0149 and 16ZA0355 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We consider the ground-state properties of a rotating spin-orbit-coupled Bose—Einstein condensate under extreme elongation in a harmonic plus quartic potential. The effects of spin-orbit coupling and rotation on the ground-state vortex structures are investigated. In the absence of spin-orbit coupling, new nucleated vortices gradually form vortex lines and annular vortex structures with the increase of the rotation frequency. In the presence of spin-orbit coupling, part of the vortices arrange in a line and form a stable vortex chain, and the remanent vortices coexist in pairs aside such vortex chain. More specially, the remanent vortices of each component repel each other and form vortex pair for isotropic spin-orbit coupling, while attract each other and locate in the same positions for anisotropic spin-orbit coupling.
Book Synopsis Solitons in Mathematics and Physics by : Alan C. Newell
Download or read book Solitons in Mathematics and Physics written by Alan C. Newell and published by SIAM. This book was released on 1985-06-01 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: A discussion of the soliton, focusing on the properties that make it physically ubiquitous and the soliton equation mathematically miraculous.
Book Synopsis Ultracold Atoms in Optical Lattices by : Maciej Lewenstein
Download or read book Ultracold Atoms in Optical Lattices written by Maciej Lewenstein and published by Oxford University Press. This book was released on 2012-03-08 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Fundamentals And New Frontiers Of Bose-einstein Condensation by : Masahito Ueda
Download or read book Fundamentals And New Frontiers Of Bose-einstein Condensation written by Masahito Ueda and published by World Scientific Publishing Company. This book was released on 2010-07-29 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals of and new developments in gaseous Bose-Einstein condensation. It begins with a review of fundamental concepts and theorems, and introduces basic theories describing Bose-Einstein condensation (BEC). It then discusses some recent topics such as fast-rotating BEC, spinor and dipolar BEC, low-dimensional BEC, balanced and imbalanced fermionic superfluidity including BCS-BEC crossover and unitary gas, and p-wave superfluidity.
Book Synopsis Effects of Mean-Field Interactions and Raman-Induced Spin-Orbit Coupling in Bose-Einstein Condensates by : Md. Kamrul Hoque Ome
Download or read book Effects of Mean-Field Interactions and Raman-Induced Spin-Orbit Coupling in Bose-Einstein Condensates written by Md. Kamrul Hoque Ome and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental realization of dilute-gas Bose-Einstein condensates (BECS) has established an extremely versatile and powerful platform for exploring uncharted territories of modern physics. The dynamics of a BEC are strongly influenced by mean-field interactions and can further be manipulated by external coupling schemes, such as Raman-induced spin-orbit coupling (SOC). This dissertation reports a series of experiments exploring the effects of mean-field interactions and additional couplings in new regimes.In the first set of experiments, the non-exponential tunneling of a BEC in an accelerating optical lattice is investigated. Mean-field interaction leads to loop formation at the Brillouin zone edges of the band structure, causing atomic tunneling to the excited states. The non-exponential nature of the tunneling is experimentally and theoretically confirmed. Next, a set of experiments is described where, instead of an optical lattice, a more intricate lattice structure is generated: a spin-dependent effective optical lattice called the Zeeman lattice. This lattice is created by the simultaneous application of SOC and an external radio frequency field. Lattice dynamics, such as Bloch oscillations, are studied, and band spectroscopy is performed. Furthermore, experimental evidence is provided supporting the restoration of Galilean symmetry in the lattice, even though SOC alone breaks this symmetry. Third, supplementing SOC with a weak optical lattice provides.experimental access to an interesting stripe phase. Its excitation spectrum is experimentally probed in the weak anisotropic spin interaction regime. A pseudo-Nambu-Goldstone gap in the zero-momentum limit of the Bogoliubov spectrum is measured and characterized with respect to the lattice strength. An excellent agreement between experimental observations and theoretical predictions is found. Finally, an alternative, independent way of generating structures and dynamics in a BEC is explored in the form of dark-antidark (DAD) solitons. A microwave drive is used to couple two hyperfine states of the ground state, and a spatially varying Rabi winding is employed. The mean-field dynamics cause DAD array formation during time evolution.This dissertation showcases the richness of the dynamics observable with BECS and opens the door to further advanced explorations with close connections to atomic physics, condensed matter physics, nonlinear science, and dispersive hydrodynamics.
Book Synopsis The BCS-BEC Crossover and the Unitary Fermi Gas by : Wilhelm Zwerger
Download or read book The BCS-BEC Crossover and the Unitary Fermi Gas written by Wilhelm Zwerger and published by Springer Science & Business Media. This book was released on 2011-10-22 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent experimental and theoretical progress has elucidated the tunable crossover, in ultracold Fermi gases, from BCS-type superconductors to BEC-type superfluids. The BCS-BEC Crossover and the Unitary Fermi Gas is a collaborative effort by leading international experts to provide an up-to-date introduction and a comprehensive overview of current research in this fast-moving field. It is now understood that the unitary regime that lies right in the middle of the crossover has remarkable universal properties, arising from scale invariance, and has connections with fields as diverse as nuclear physics and string theory. This volume will serve as a first point of reference for active researchers in the field, and will benefit the many non-specialists and graduate students who require a self-contained, approachable exposition of the subject matter.
Book Synopsis Quantum Phases and Dynamics of Ultracold Atomic Gases with Synthetic Gauge Fields by : Chunlei Qu
Download or read book Quantum Phases and Dynamics of Ultracold Atomic Gases with Synthetic Gauge Fields written by Chunlei Qu and published by . This book was released on 2015 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gauge fields and spin-orbit interactions, which are absent for neutral atoms, can be engineered by suitably coupling atoms with laser fields or by periodically shaking optical lattices. The experimental realization of synthetic gauge fields and spin-orbit coupling provides a versatile platform for the exploration of novel quantum phases in interacting atomic gases and for the simulation of condensed matter phenomena. In this dissertation, I will study the quantum phases and dynamics of ultracold atomic gases in harmonic traps or optical lattices in the presence of synthetic gauge fields and spin-orbit coupling. The topics in this dissertation include the collaborative experimental observation of Zitterbewegung oscillation, Dicke-type phase transition, and tunable spin-orbit coupling in spin-orbit coupled Bose-Einstein condensates, the theoretical investigation of Fulde-Ferrell-Larkin-Ovchinnikov states and topological superfluids with Majorana fermions in spin-orbit coupled degenerate Fermi gases, and the study of atomic gases in periodically driven optical lattices, etc.
Book Synopsis Quantum Matter at Ultralow Temperatures by : M. Inguscio
Download or read book Quantum Matter at Ultralow Temperatures written by M. Inguscio and published by IOS Press. This book was released on 2016-09-27 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Enrico Fermi summer school on Quantum Matter at Ultralow Temperatures held on 7-15 July 2014 at Varenna, Italy, featured important frontiers in the field of ultracold atoms. For the last 25 years, this field has undergone dramatic developments, which were chronicled by several Varenna summer schools, in 1991 on Laser Manipulation of Atoms, in 1998 on Bose-Einstein Condensation in Atomic Gases, and in 2006 on Ultra-cold Fermi Gases. The theme of the 2014 school demonstrates that the field has now branched out into many different directions, where the tools and precision of atomic physics are used to realise new quantum systems, or in other words, to quantum-engineer interesting Hamiltonians. The topics of the school identify major new directions: Quantum gases with long range interactions, either due to strong magnetic dipole forces, due to Rydberg excitations, or, for polar molecules, due to electric dipole interactions; quantum gases in lower dimensions; quantum gases with disorder; atoms in optical lattices, now with single-site optical resolution; systems with non-trivial topological properties, e.g. with spin-orbit coupling or in artificial gauge fields; quantum impurity problems (Bose and Fermi polarons); quantum magnetism. Fermi gases with strong interactions, spinor Bose-Einstein condensates and coupled multi-component Bose gases or Bose-Fermi mixtures continue to be active areas. The current status of several of these areas is systematically summarized in this volume.
Book Synopsis Universal Themes of Bose-Einstein Condensation by : Nick P. Proukakis
Download or read book Universal Themes of Bose-Einstein Condensation written by Nick P. Proukakis and published by Cambridge University Press. This book was released on 2017-04-27 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following an explosion of research on Bose–Einstein condensation (BEC) ignited by demonstration of the effect by 2001 Nobel prize winners Cornell, Wieman and Ketterle, this book surveys the field of BEC studies. Written by experts in the field, it focuses on Bose–Einstein condensation as a universal phenomenon, covering topics such as cold atoms, magnetic and optical condensates in solids, liquid helium and field theory. Summarising general theoretical concepts and the research to date - including novel experimental realisations in previously inaccessible systems and their theoretical interpretation - it is an excellent resource for researchers and students in theoretical and experimental physics who wish to learn of the general themes of BEC in different subfields.
Book Synopsis Introduction to Unconventional Superconductivity by : V.P. Mineev
Download or read book Introduction to Unconventional Superconductivity written by V.P. Mineev and published by CRC Press. This book was released on 1999-09-21 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional superconductivity (or superconductivity with a nontrivial Cooper pairing) is believed to exist in many heavy-fermion materials as well as in high temperature superconductors, and is a subject of great theoretical and experimental interest. The remarkable progress achieved in this field has not been reflected in published monographs and textbooks, and there is a gap between current research and the standard education of solid state physicists in the theory of superconductivity. This book is intended to meet this information need and includes the authors' original results.
Book Synopsis Symmetry, Spin Dynamics And The Properties Of Nanostructures - Lecture Notes Of The 11th International School On Theoretical Physics by : Vitalii K Dugaev
Download or read book Symmetry, Spin Dynamics And The Properties Of Nanostructures - Lecture Notes Of The 11th International School On Theoretical Physics written by Vitalii K Dugaev and published by World Scientific. This book was released on 2015-11-09 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of lecture notes which were presented by invited speakers at the Eleventh School on Theoretical Physics 'Symmetry and Structural Properties of Condensed Matter SSPCM 2014' in Rzeszów (Poland) in September 2014. The main challenge for the lecturers was the objective to present their subject as a review as well as in the form of introduction for beginners. Topics considered in the volume concentrate on: spin dynamics and spin transport in magnetic and non-magnetic structures, spin-orbit interaction in two-dimensional systems and graphene, and new mathematical method used in the condensed matter physics.
