Publications (133)
Signatures of Strong Correlations in One-Dimensional Ultra-Cold Atomic Fermi Gases
Paata Kakashvili, S. G. Bhongale, Han Pu +1
Recent success in manipulating ultra-cold atomic systems allows to probe different strongly correlated regimes in one-dimension. Regimes such as the (spin-coherent) Luttinger liqui…
Quantum tricriticality of chiral-coherent phase in quantum Rabi triangle
Yu-Yu Zhang, Zi-Xiang Hu, Libin Fu +3
The interplay of interactions, symmetries and gauge fields usually leads to intriguing quantum many-body phases. To explore the nature of emerging phases, we study a quantum Rabi t…
Wave mixing of optical pulses and Bose-Einstein condensates
Han Pu, Weiping Zhang, Pierre Meystre
We investigate theoretically the four-wave mixing of optical and matter waves resulting from the scattering of a short light pulse off an atomic Bose-Einstein condensate, as recent…
Dynamical generation of geometric squeezing in interacting Bose-Einstein condensates
Li Chen, Fei Zhu, Zheng Tang +3
When the rotating frequency of a non-interacting Bose-Einstein condensate (BEC) confined in a weak anisotropic harmonic potential is suddenly quenched to its trapping frequency, th…
Trapped-Ion Quantum Simulation of Electron Transfer Models with Tunable Dissipation
Visal So, Midhuna Duraisamy Suganthi, Abhishek Menon +6
Electron transfer is at the heart of many fundamental physical, chemical, and biochemical processes essential for life. The exact simulation of these reactions is often hindered by…
Strongly Interacting Quantum Gases in One-Dimensional Traps
Li Yang, Liming Guan, Han Pu
Under the second-order degenerate perturbation theory, we show that the physics of particles with arbitrary spin confined in a one dimensional trap in the strongly interacting…
Three-dimensional spin-orbit coupled Fermi gases: Fulde-Ferrell pairing, Majorana fermions, Weyl fermions and gapless topological superfluidity
Xia-Ji Liu, Hui Hu, Han Pu
We theoretically investigate a three-dimensional Fermi gas with Rashba spin-orbit coupling in the presence of both out-of-plane and in-plane Zeeman fields. We show that, driven by…
Tomonaga-Luttinger liquid theory for one-dimensional attractive Fermi gases
Hai-Ying Cui, Yu-Hao Yeh, Randall G. Hulet +3
The one-dimensional (1D) Yang-Gaudin model-an integrable -function interacting Fermi gas, serves as a paradigm in quantum many-body physics, encompassing phenomena from spin-ch…
Hartree-Fock-Bogoliubov Theory of Dipolar Fermi Gases
Cheng Zhao, Lei Jiang, Xunxu Liu +3
We construct a fully self-consistent Hartree-Fock-Bogoliubov theory that describes a spinless Fermi gas with long-range interaction. We apply this theory to a system of uniform dip…
Understanding the quantum Rabi ring using analogies to quantum magnetism
Diego Fallas Padilla, Han Pu, Guo-Jing Cheng +1
We map a quantum Rabi ring, consisting of cavities arranged in a ring geometry, into an effective magnetic model containing the XY exchange and the Dzyaloshinskii Moriya (DM) i…
Stable Solitons in Three Dimensional Free Space: Self-Trapped Bose-Einstein Condensates with Spin-Orbit Coupling
Yong-Chang Zhang, Zheng-Wei Zhou, Boris A. Malomed +1
By means of variational methods and systematic numerical analysis, we demonstrate the existence of stable solitons in three-dimensional (3D) free space, in the context of binary at…
Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions
Ji Bian, Wei Wu, Zihan Xie +8
Temporal non-analyticities in the rate function of the Loschmidt echo manifests a class of dynamical quantum phase transitions (DQPTs) that has emerged as a powerful framework for…
Harmonically Trapped Atoms with Spin-Orbit Coupling
Chuanzhou Zhu, Lin Dong, Han Pu
We study harmonically trapped one-dimensional atoms subjected to an equal combination of Rashba and Dresselhaus spin-orbit coupling induced by Raman transition. We first examine th…
Itinerant chiral ferromagnetism in a trapped Rashba spin-orbit coupled Fermi gas
Shang-Shun Zhang, Wu-Ming Liu, Han Pu
How ferromagnetic phases emerge in itinerant systems is an outstanding problem in quantum magnetism. Here we consider a repulsive two-component Fermi gas confined in a two dimensio…
Dipolar spinor Bose-Einstein condensates
Su Yi, Han Pu
Under many circumstances, the only important two-body interaction between atoms in ultracold dilute atomic vapors is the short-ranged isotropic s-wave collision. Recent studies hav…
Multicriticality and quantum fluctuation in generalized Dicke model
Youjiang Xu, Diego Fallas Padilla, Han Pu
We consider an important generalization of the Dicke model in which multi-level atoms, instead of two-level atoms as in conventional Dicke model, interact with a single photonic mo…
Spin exchange-induced spin-orbit coupling in a superuid mixture
Li Chen, Chuanzhou Zhu, Yunbo Zhang +1
We investigate the ground-state properties of a dual-species spin-1/2 Bose-Einstein condensate. One of the species is subjected to a pair of Raman laser beams that induces spin-orb…
Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
Zhen Zheng, Han Pu, Xubo Zou +1
We investigate the thermodynamic properties of a superfluid Fermi gas subject to Rashba spin-orbit coupling and effective Zeeman field. We adopt a T-matrix scheme that takes beyond…
Measurement back-action on the quantum spin-mixing dynamics of a spin-1 Bose-Einstein condensate
Keye Zhang, Lu Zhou, Hong Y. Ling +2
We consider a small F=1 spinor condensate inside an optical cavity driven by an optical probe field, and subject the output of the probe to a homodyne detection, with the goal of i…
Creating stable molecular condensate using a generalized Raman adiabatic passage scheme
Hong Y. Ling, Han Pu, Brian Seaman
We study the Feshbach resonance assisted stimulated adiabatic passage of an effective coupling field for creating stable molecules from atomic Bose condensate. By exploring the pro…
Magnetism in a lattice of spinor Bose condensates
Kevin Gross, Chris P. Search, Han Pu +2
We study the ground state magnetic properties of ferromagnetic spinor Bose-Einstein condensates confined in a deep optical lattices. In the Mott insulator regime, the ``mini-conden…
Synthetic U(1) Gauge Invariance in a Spin-1 Bose Gas
Chunping Gao, Jinghu Liu, Maolin Chang +2
Recent experimental realizations of the lattice Schwinger model [Nature 587, 392 (2020) and Science 367, 1128 (2020)] open a door for quantum simulation of elementary particles and…
Topological States Enabled by Non-local Nonlinearity in Synthetic Dimensions
Chong-Xiao Chen, Zheng-Wei Zhou, Han Pu +1
The interplay between topology and nonlinearity represents a central challenge in modern physics. Here, we investigate this interplay by considering a synthetic Su-Schrieffer-Heege…
Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases
L. O. Baksmaty, Hong Lu, C. J. Bolech +1
It is quite common that several different phases exist simultaneously in a system of trapped quantum gases of ultra-cold atoms. One such example is the strongly-interacting Fermi g…
Adiabatic Condition for Nonlinear Systems
Han Pu, Peter Maenner, Weiping Zhang +1
We revisit the adiabatic criterion in stimulated Raman adiabatic passage for the three-level -system, and compare the situation with and without nonlinearity. In linear systems…
Formation and Transformation of Vector-Solitons in Two-Species Bose-Einstein Condensates with Tunable Interaction
Xunxu Liu, Han Pu, Bo Xiong +2
Under a unified theory we investigate the formation of various types of vector-solitons in two-species Bose-Einstein condensates with arbitrary scattering lengths. We then show tha…
Dynamical topological phases in quenched spin-orbit coupled degenerate Fermi gas
Ying Dong, Lin Dong, Ming Gong +1
The spin-orbit coupled degenerate Fermi gas provides a totally new platform to realize topological superfluids and related topological excitations. Previous studies have mainly foc…
Phase transition and multistability in Dicke dimer
Yilun Xu, Feng-Xiao Sun, Wei Zhang +2
The exotic phase transitions and multistabilities in atom-cavity coupled systems have attracted tremendous interests recently. In this work, we investigate the effect of photon hop…
Two-fermion bound state in a Bose-Einstein condensate
Weiping Zhang, Han Pu, Chris P. Search +2
A nonlinear Schrödinger equation is derived for the dynamics of a beam of ultracold fermionic atoms traversing a Bose-Einstein condensate. The condensate phonon modes are shown to…
Non-Abelian geometric potentials and spin-orbit coupling for periodically driven systems
Povilas RaÄkauskas, Viktor NoviÄenko, Han Pu +1
We demonstrate the emergence of the non-Abelian geometric potentials and thus the three-dimensional (3D) spin-orbit coupling (SOC) for ultracold atoms without using the laser beams…
Artificial topological models based on a one-dimensional spin-dependent optical lattice
Zhen Zheng, Han Pu, Xubo Zou +1
Topological matter is a popular topic in both condensed matter and cold atom research. In the past decades, a variety of models have been identified with fascinating topological fe…
Coherent population oscillation from a Fermi atom-molecule dark state
Andrew Robertson, Lei Jiang, Han Pu +2
We show that a robust macroscopic atom-molecule dark state can exist in fermionic systems, which represents a coherent superposition between the ground molecular BEC and the atomic…
Delocalized Excitation Transfer in Open Quantum Systems with Long-Range Interactions
Diego Fallas Padilla, Visal So, Abhishek Menon +3
The interplay between coherence and system-environment interactions is at the basis of a wide range of phenomena, from quantum information processing to charge and energy transfer…
Number-conserving interacting fermion models with exact topological superconducting ground states
Zhiyuan Wang, Youjiang Xu, Han Pu +1
We present a method to construct number-conserving Hamiltonians whose ground states exactly reproduce an arbitrarily chosen BCS-type mean-field state. Such parent Hamiltonians can…
Phonon spectrum and dynamical stability of a quantum degenerate Bose-Fermi mixture
Han Pu, Weiping Zhang, Martin Wilkens +1
We calculate the phonon excitation spectrum in a zero-temperature boson-fermion mixture. We show how the sound velocity changes due to the boson-fermion interaction and we determin…
Two-component Bose-Hubbard model in an array of cavity polaritons
Yong-Chang Zhang, Xiang-Fa Zhou, Xingxiang Zhou +3
We propose a scheme which can realize an extended two-component Bose-Hubbard model using polaritons confined in an array of optical cavities. In addition to the density-dependent i…
Dissipative Phase Transition in a Parametrically Amplified Quantum Rabi Model with Two-photon decay
Mingjian Zhu, Han Pu
We investigate dissipative phase transitions (DPTs) in a parametrically amplified open quantum Rabi model (QRM) with both single- and two-photon decay. In the classical oscillator…
Quantum phase transition in a quantum Rabi square with next-nearest-neighbor hopping
Yilun Xu, Feng-Xao Sun, Qiongyi He +2
We propose a quantum Rabi square model where both the nearest-neighbor and the next-nearest-neighbor photon hopping are allowed among four quantum Rabi systems located at the verti…
Vortex patterns and the critical rotational frequency in rotating dipolar Bose-Einstein condensates
Yongyong Cai, Yongjun Yuan, Matthias Rosenkranz +2
Based on the two-dimensional mean-field equations for pancake-shaped dipolar Bose-Einstein condensates in a rotating frame with both attractive and repulsive dipole-dipole interact…
Floquet geometric squeezing in fast-rotating condensates
Li Chen, Fei Zhu, Yunbo Zhang +1
Constructing and manipulating quantum states in fast-rotating Bose-Einstein condensates (BEC) has long stood as a significant challenge as the rotating speed approaching the critic…
Phase Separation in Bose-Fermi-Fermi Mixtures as a Probe of Fermi Superfluidity
S. G. Bhongale, Han Pu
We study the phase diagram of a mixture of Bose-Einstein condensate and a two-component Fermi gas. In particular, we identify the regime where the homogeneous system becomes unstab…
Single Impurity In Ultracold Fermi Superfluids
Lei Jiang, Leslie O. Baksmaty, Hui Hu +2
The role of impurities as experimental probes in the detection of quantum material properties is well appreciated. Here we study the effect of a single classical magnetic impurity…
Synthetic Landau levels and spinor vortex matter on Haldane spherical surface with magnetic monopole
Xiang-Fa Zhou, Congjun Wu, Guang-Can Guo +3
We present a flexible scheme to realize exact flat Landau levels on curved spherical geometry in a system of spinful cold atoms. This is achieved by Floquet engineering of a magnet…
Expansion of 1D polarized superfluids: The FFLO state reveals itself
Hong Lu, L. O. Baksmaty, C. J. Bolech +1
We study the expansion dynamics of a one dimensional polarized Fermi gas after sudden release from confinement using both the mean-field Bogoliubov-de Gennes and the numerically ex…
Spin Mixing in Spinor Fermi Gases
Ying Dong, Han Pu
We study a spinor fermionic system under the effect of spin-exchange interaction. We focus on the interplay between the spin-exchange interaction and the effective quadratic Zeeman…
Monogamy-of-entanglement-inspired protocol to quantify bipartite entanglement using spin squeezing
Diego Fallas Padilla, Mingjian Zhu, Han Pu
Quantum entanglement is an essential resource for quantum science and technology. However, entanglement detection and quantification, via typical entanglement measures such as line…
Emergent Universality in a Quantum Tricritical Dicke Model
Youjiang Xu, Han Pu
We propose a generalized Dicke model which supports a quantum tricritical point. We map out the phase diagram and investigate the critical behaviors of the model through exact low-…
Radio-frequency spectroscopy of a strongly interacting spin-orbit coupled Fermi gas
Zhengkun Fu, Lianghui Huang, Zengming Meng +5
We investigate experimentally and theoretically radio-frequency spectroscopy and pairing of a spin-orbit-coupled Fermi gas of K atoms near a Feshbach resonance at $B_{0}=202…
Ferromagnetism in a lattice of Bose condensates
Han Pu, Weiping Zhang, Pierre Meystre
We show that an ensemble of spinor Bose-Einstein condensates confined in a one dimensional optical lattice can undergo a ferromagnetic phase transition and spontaneous magnetizatio…
Experimental Realization of Thermal Reservoirs with Tunable Temperature in a Trapped-Ion Spin-Boson Simulator
Visal So, Mingjian Zhu, Midhuna Duraisamy Suganthi +5
We propose and demonstrate an experimental scheme to engineer thermal baths with independently tunable temperatures and dissipation rates for the motional modes of a trapped-ion sy…
Perfect Intrinsic Squeezing at the Superradiant Phase Transition Critical Point
Kenji Hayashida, Takuma Makihara, Nicolas Marquez Peraca +4
The ground state of the photon-matter coupled system described by the Dicke model is found to be perfectly squeezed at the quantum critical point of the superradiant phase transiti…
Protecting spin squeezing from decoherence
Lin Jiao, Han Pu, Jun-Hong An
As a crucial resource in the field of quantum metrology, spin squeezing can facilitate highly precise measurements that surpass the limitations imposed by classical physics. Howeve…
Angular spin-orbit coupling in cold atoms
Michael DeMarco, Han Pu
We propose coupling two internal atomic states using a pair of Raman beams operated in Laguerre-Gaussian laser modes with unequal phase windings. This generates a coupling between…
Exact results of one-dimensional repulsive Hubbard model
Jia-Jia Luo, Han Pu, Xi-Wen Guan
We present analytical results of fundamental properties of one-dimensional (1D) Hubbard model with a repulsive interaction, ranging from fractional excitations to universal thermod…
Dynamical Fermionization in One Dimensional Spinor Gases
Shah Saad Alam, Timothy Skaras, Li Yang +1
Dynamical fermionization refers to the phenomenon in Tonks-Girardeau (TG) gases where, upon release from harmonic confinement, the gas's momentum density profile evolves asymptotic…
Multi-stability in an optomechanical system with two-component Bose-Einstein condensate
Ying Dong, Jinwu Ye, Han Pu
We investigate a system consisting of a two-component Bose-Einstein condensate interacting dispersively with a Fabry-Perot optical cavity where the two components of the condensate…
Symmetry Breaking and Self-trapping of a Dipolar Bose-Einstein Condensate in a Double-well Potential
Bo Xiong, Jiangbin Gong, Han Pu +2
The quantum self-trapping phenomenon of a Bose-Einstein condensate (BEC) represents a remarkable nonlinear effect of wide interest. By considering a purely dipolar BEC in a double-…
Building Flat-Band Lattice Models from Gram Matrices
Youjiang Xu, Han Pu
We propose a powerful and convenient method to systematically design flat-band lattice models, which overcomes the difficulties underlying the previous method. Especially, our meth…
Tricritical Dicke model with and without dissipation
Diego Fallas Padilla, Han Pu
Light-matter interacting systems involving multi-level atoms are appealing platforms for testing equilibrium and dynamical phenomena. Here, we explore a tricritical Dicke model, wh…
One-Body Density Matrix and Momentum Distribution of Strongly Interacting One-Dimensional Spinor Quantum Gases
Li Yang, Han Pu
The one-body density matrix (OBDM) of a strongly interacting spinor quantum gas in one dimension can be written as a summation of products of spatial and spin parts. We find that t…
Effects of Spin-Orbit Coupling on Jaynes-Cummings and Tavis-Cummings Models
Chuanzhou Zhu, Lin Dong, Han Pu
We consider ultracold atoms inside a ring optical cavity that supports a single plane-wave mode. The cavity field, together with an external coherent laser field, drives a two-phot…
Many-body \textit{T}-matrix theory of a strongly interacting spin-orbit coupled Fermi gas: Momentum-resolved radio-frequency spectroscopy and fermionic pairing
Hui Hu, Han Pu, Jing Zhang +1
Interacting Fermi gases with spin-orbit coupling are responsible for many intriguing phenomena such as topological superfluids and Majorana fermions. Here we characterize theoretic…
Engineering and Revealing Dirac Strings in Spinor Condensates
Gui-Sheng Xu, Mudit Jain, Xiang-Fa Zhou +4
Artificial monopoles have been engineered in various systems, yet there has been no systematic study of the singular vector potentials associated with the monopole field. We show t…
Chiral Quantum Phases and Tricriticality in a Dicke Triangle
Guo-Jing Chen, Diego Fallas Padilla, Tao Deng +2
The existence of quantum tricriticality and exotic phases are found in a Dicke triangle (TDT) where three cavities, each one containing an ensemble of three-level atoms, are connec…
Emergence and disruption of spin-charge separation in one-dimensional repulsive fermions
Feng He, Yu-Zhu Jiang, Hai-Qing Lin +3
At low temperature, collective excitations of one-dimensional (1D) interacting fermions exhibit spin-charge separation, a unique feature predicted by the Tomonaga-Luttinger liquid…
Efficient generation of many-body singlet states of spin-1 bosons in optical superlattices
Huanying Sun, Peng Xu, Han Pu +1
We propose an efficient stepwise adiabatic merging (SAM) method to generate many-body singlet states in antiferromagnetic spin-1 bosons in concatenated optical superlattices with i…
Cavity-Mediated Strong Matter Wave Bistability in a Spin-1 Condensate
Lu Zhou, Han Pu, Hong Y. Ling +1
We study matter wave bistability in a spin-1 Bose-Einstein condensate dispersively coupled to a unidirectional ring cavity. A unique feature is that the population exchange among d…
Detection of Fermi Pairing via Electromagnetically Induced Transparency
Lei Jiang, Han Pu, Weiping Zhang +1
An optical spectroscopic method based on the principle of electromagnetically-induced transparency (EIT) is proposed as quite a generic probing tool that provides valuable insights…
Probing anisotropic superfluidity of rashbons in atomic Fermi gases
Hui Hu, Lei Jiang, Xia-Ji Liu +1
Motivated by the prospect of realizing a Fermi gas of K atoms with a synthetic non-Abelian gauge field, we investigate theoretically a strongly interacting Fermi gas in the…
A fundamental limit for integrated atom optics with Bose-Einstein condensates
Weiping Zhang, Ewan M. Wright, Han Pu +1
The dynamical response of an atomic Bose-Einstein condensate manipulated by an integrated atom optics device such as a microtrap or a microfabricated waveguide is studied. We show…
Anderson Localization of cold atomic gases with effective spin-orbit interaction in a quasiperiodic optical lattice
Lu Zhou, Han Pu, Weiping Zhang
We theoretically investigate the localization properties of a spin-orbit coupled spin-1/2 particle moving in a one-dimensional quasiperiodic potential, which can be experimentally…
Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance
Lu Zhou, Jing Qian, Han Pu +2
We consider a mixture of two-species atomic Bose-Einstein codensates coupled to a bound molecular state at zero temperature via interspecies Feshbach resonance. The interspecies Fe…
Quantum Simulation of an Extended Dicke Model with a Magnetic Solid
Nicolas Marquez Peraca, Xinwei Li, Jaime M. Moya +13
The Dicke model describes the cooperative interaction of an ensemble of two-level atoms with a single-mode photonic field and exhibits a quantum phase transition as a function of l…
Low Energy Excitations of a 1D Fermi Gas with Attractive Interactions
Aashish Kafle, Ruwan Senaratne, Danyel Cavazos-Cavazos +5
The low-energy excitations of a two-component repulsive Fermi gas confined to one dimension are linear dispersing spin- and charge-density waves whose respective propagation veloci…
Photon-Induced Spin-Orbit Coupling in Ultracold Atoms inside Optical Cavity
Lin Dong, Chuanzhou Zhu, Han Pu
We consider an atom inside a ring cavity, where a plane-wave cavity field together with an external coherent laser beam induces a two-photon Raman transition between two hyperfine…
Collective excitation of a trapped Bose-Einstein condensate with spin-orbit coupling
Li Chen, Han Pu, Zeng-Qiang Yu +1
We investigate the collective excitations of a Raman-induced spin-orbit coupled Bose-Einstein condensate confined in a quasi one-dimension harmonic trap using the Bogoliubov method…
Quantum transport in 1D Hubbard model: Drude weights and Seebeck effect
Jia-Jia Luo, Sagarika Basak, Han Pu +1
The Drude weight (DW) is an essential quantity that characterizes the quantum transport properties of many-body systems. However, a rigorous understanding and exact computation of…
Gapless topological Fulde-Ferrell superfluidity induced by in-plane Zeeman field
Hui Hu, Lin Dong, Ye Cao +2
Topological superfluids are recently discovered quantum matters that host topologically protected gapless edge states known as Majorana fermions - exotic quantum particles that act…
Spin-Nematic Vortex States in Cold Atoms
Li Chen, Yunbo Zhang, Han Pu
The (pseudo-)spin degrees of freedom greatly enriches the physics of cold atoms. This is particularly so for systems with high spins (i.e., spin quantum number larger than 1/2). Fo…
Probing Majorana fermions in spin-orbit coupled atomic Fermi gases
Xia-Ji Liu, Lei Jiang, Han Pu +1
We examine theoretically the visualization of Majorana fermions in a two-dimensional trapped ultracold atomic Fermi gas with spin-orbit coupling. By increasing an external Zeeman f…
Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases
Hui Hu, Han Pu, Jing Zhang +2
We investigate theoretically radio-frequency spectroscopy of weakly bound molecules in an ultracold spin-orbit-coupled atomic Fermi gas. We consider two cases with either equal Ras…
Manifestations of the Roton Mode in Dipolar Bose-Einstein Condensates
Ryan M. Wilson, Shai Ronen, Han Pu +1
We investigate the structure of trapped Bose-Einstein condensates (BECs) with long-range anisotropic dipolar interactions. We find that a small perturbation in the trapping potenti…
Universal impurity-induced bound state in topological superfluids
Hui Hu, Lei Jiang, Han Pu +2
We predict a universal mid-gap bound state in topological superfluids, induced by either non-magnetic or magnetic impurities in the strong scattering limit. This universal state is…
Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas
Lin Dong, Lei Jiang, Hui Hu +1
We investigate the two-body properties of a spin-1/2 Fermi gas subject to a spin-orbit coupling induced by laser fields. When an attractive s-wave interaction between unlike spins…
Spin squeezing in a spin-orbit coupled Bose-Einstein condensate
Li Chen, Yunbo Zhang, Han Pu
We study the spin squeezing in a spin-1/2 Bose-Einstein condensates (BEC) with Raman induced spin-orbit coupling (SOC). Under the condition of two-photon resonance and weak Raman c…
Dissociation dynamics of a Bose-Einstein condensate of molecules
Michael W. Jack, Han Pu
An unstable condensate of diatomic molecules will coherently disassociate into correlated pairs of atoms. This dissociation process exhibits very rich quantum dynamics depending on…
Feshbach-resonance-induced atomic filamentation and quantum pair correlation in atom-laser-beam propagation
Weiping Zhang, Chris P. Search, Han Pu +2
We study the propagation of an atom laser beam through a spatial region with a magnetic field tuned to a Feshbach resonance. Tuning the magnetic field below the resonance produces…
Fermi Gases with Synthetic Spin-Orbit Coupling
Jing Zhang, Hui Hu, Xia-Ji Liu +1
We briefly review recent progress on ultracold atomic Fermi gases with different types of synthetic spin-orbit coupling, including the one-dimensional (1D) equal weight Rashba-Dres…
Spin waves in a Bose-condensed atomic spin chain
Weiping Zhang, Han Pu, Chris Search +1
The spin dynamics of atomic Bose-Einstein condensates confined in a one-dimensional optical lattice is studied. The condensates at each lattice site behave like spin magnets that c…
Breakdown of the single-mode description of ultradilute quantum droplets in binary Bose mixtures: A perspective from a microscopic bosonic pairing theory
Hui Hu, Jia Wang, Han Pu +1
In his seminal proposal of quantum droplets in binary Bose mixtures {[}Phys. Rev. Lett. \textbf{115}, 155302 (2015){]}, Dmitry Petrov suggested that the density ratio …
Spin-orbit-angular-momentum coupling in a spin-1 Bose-Einstein condensate
Li Chen, Han Pu, Yunbo Zhang
We propose a simple model with spin and orbit angular momentum coupling in a spin-1 Bose- Einstein condensate, where three internal atomic states are Raman coupled by a pair of co-…
Matter-wave bistability in coupled atom-molecule quantum gases
Lei Jiang, Han Pu, Andrew Robertson +1
We study the matter-wave bistability in coupled atom-molecule quantum gases, in which heteronuclear molecules are created via an interspecies Feshbach resonance involving either tw…
Quantum Simulation of Charge and Exciton Transfer in Multi-mode Models using Engineered Reservoirs
Visal So, Midhuna Duraisamy Suganthi, Mingjian Zhu +7
Quantum simulation offers a route to study open-system molecular dynamics in non-perturbative regimes by programming the interactions among electronic, vibrational, and environment…
Spin-charge separation in a 1D Fermi gas with tunable interactions
Ruwan Senaratne, Danyel Cavazos-Cavazos, Sheng Wang +6
Ultracold atoms confined to periodic potentials have proven to be a powerful tool for quantum simulation of complex many-body systems. We confine fermions to one-dimension to reali…
Spin-orbit-coupled topological Fulde-Ferrell states of fermions in a harmonic trap
Lei Jiang, Eite Tiesinga, Xia-Ji Liu +2
Motivated by recent experimental breakthroughs in generating spin-orbit coupling in ultracold Fermi gases using Raman laser beams, we present a systematic study of spin-orbit-coupl…
Dicke materials as a resource for quantum squeezing
Vaibhav Sharma, Shung-An Koh, Jonathan Stepp +8
We study magnetic materials whose low energy physics can be effectively described by a Dicke model, which we term Dicke materials. We show how a Dicke model emerges in such materia…
Spin-exchange-induced exotic superfluids in a Bose-Fermi spinor mixture
Chuanzhou Zhu, Li Chen, Hui Hu +2
We consider a mixture of spin-1/2 bosons and fermions, where only the bosons are subjected to the spin-orbit coupling induced by Raman beams. The fermions, although not directly co…
Self-trapping of a Fermi super-fluid in a double-well potential in the BEC-unitarity crossover
S. K. Adhikari, Hong Lu, Han Pu
We derive a generalized Gross-Pitaevskii density-functional equation appropriate to study the Bose-Einstein condensate (BEC) of dimers formed of singlet spin-half Fermi pairs in th…
Strongly Interacting Two-component Coupled Bose Gas in Optical Lattices
Sagarika Basak, Han Pu
Two-component coupled Bose gas in a 1D optical lattice is examined. In addition to the postulated Mott insulator and superfluid phases, multiple bosonic components manifest spin de…
Field-induced topological pair-density wave states in a multilayer optical lattice
Zhen-Fei Zheng, Guang-Can Guo, Han Pu +1
We study the superfluid phases of a Fermi gas in a multilayer optical lattice system in the presence of out-of-plane Zeeman field, as well as spin-orbit (SO) coupling. We show that…