305 citations · 1.7k across the 32 of their papers we have counts for
32 papers
Single-Ensemble Multiparameter Squeezing with Qudits
Xiaoshui Lin, Chunlei Qu, Chong Zu +1
Conventional spin squeezing enhances a single sensing channel. Here, we show how internal qudit levels enable simultaneous multiparameter squeezing within one ensemble. In two-comp…
Observation of Distinct Phase Transitions in a Nonlinear Optical Ising Machine
Santosh Kumar, Zhaotong Li, Ting Bu +2
Optical Ising machines promise to solve complex optimization problems with an optical hardware acceleration advantage. Here we study the ground state properties of a nonlinear opti…
Spin squeezing with short-range spin-exchange interactions
Michael A. Perlin, Chunlei Qu, Ana Maria Rey
We investigate many-body spin squeezing dynamics in an XXZ model with interactions that fall off with distance as in and spatial dimensions. In stark contrast…
Spin squeezing and many-body dipolar dynamics in optical lattice clocks
Chunlei Qu, Ana M. Rey
The recent experimental realization of a three-dimensional (3D) optical lattice clock not only reduces the influence of collisional interactions on the clock's accuracy but also pr…
Spin current generation and relaxation in a quenched spin-orbit-coupled Bose-Einstein condensate
Chuan-Hsun Li, Chunlei Qu, Robert J. Niffenegger +9
Understanding the effects of spin-orbit coupling (SOC) and many-body interactions on spin transport is important in condensed matter physics and spintronics. This topic has been in…
Angular Momentum of a Bose-Einstein Condensate in a Synthetic Rotational Field
Chunlei Qu, Sandro Stringari
By applying a position-dependent detuning to a spin-orbit-coupled Hamiltonian with equal Rashba and Dresselhaus coupling, we exploit the behavior of the angular momentum of a harmo…
Observation of Spin Superfluidity in a Bose Gas Mixture
E. Fava, T. Bienaimé, C. Mordini +5
The spin dynamics of a harmonically trapped Bose-Einstein condensed binary mixture of sodium atoms is experimentally investigated at finite temperature. In the collisional regime t…
Spin-orbit-coupling induced localization in the expansion of an interacting Bose-Einstein condensate
Chunlei Qu, Lev P. Pitaevskii, Sandro Stringari
By developing a hydrodynamic formalism, we investigate the expansion dynamics of the single-minimum phase of a binary spin-orbit coupled Bose-Einstein condensate, after releasing f…
Observation of Floquet band topology change in driven ultracold Fermi gases
Lianghui Huang, Peng Peng, Donghao Li +6
Periodic driving of a quantum system can significantly alter its energy bands and even change the band topology, opening a completely new avenue for engineering novel quantum matte…
Magnetic solitons in Rabi-coupled Bose-Einstein condensates
Chunlei Qu, Marek Tylutki, Sandro Stringari +1
We study magnetic solitons, solitary waves of spin polarization (i.e., magnetization), in binary Bose-Einstein condensates in the presence of Rabi coupling. We show that the system…
Expansion of harmonically trapped interacting particles and time dependence of the contact
Chunlei Qu, Lev P. Pitaevskii, Sandro Stringari
We study the expansion of an interacting atomic system at zero temperature, following its release from an isotropic three-dimensional harmonic trap and calculate the time dependenc…
Valley-Selective Topological Ordered States in Irradiated Bilayer Graphene
Chunlei Qu, Chuanwei Zhang, Fan Zhang
Gapless bilayer graphene is susceptible to a variety of spontaneously gapped states. As predicted by theory and observed by experiment, the ground state is however topologically tr…
Spin-Dipole Oscillation and Polarizability of a Binary Bose-Einstein Condensate near the Miscible-Immiscible Phase Transition
Tom Bienaimé, Eleonora Fava, Giacomo Colzi +6
We report on the measurement of the spin-dipole (SD) polarizability and of the frequency of the SD oscillation of a two-component Bose-Einstein condensate of sodium atoms occupying…
Optical-lattice-assisted magnetic phase transition in a spin-orbit-coupled Bose-Einstein condensate
Giovanni I. Martone, Tomoki Ozawa, Chunlei Qu +1
We investigate the effect of a periodic potential generated by a one-dimensional optical lattice on the magnetic properties of an spin-orbit-coupled Bose gas. By increasing…
Magnetic Solitons in a Binary Bose-Einstein Condensate
Chunlei Qu, Lev P. Pitaevskii, Sandro Stringari
We study solitary waves of polarization (magnetic solitons) in a two-component Bose gas with slightly unequal repulsive intra- and interspin interactions. In experimentally relevan…
Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates
Kuei Sun, Chunlei Qu, Yong Xu +2
The recent experimental realization of spin-orbit (SO) coupling for spin-1 ultracold atoms opens an interesting avenue for exploring SO-coupling-related physics in large-spin syste…
Dynamical spin-density waves in a spin-orbit-coupled Bose-Einstein condensate
Yan Li, Chunlei Qu, Yongsheng Zhang +1
Synthetic spin-orbit (SO) coupling, an important ingredient for quantum simulation of many exotic condensed matter physics, has recently attracted considerable attention. The stati…
Spin-momentum coupled Bose-Einstein condensates with lattice band pseudospins
M. A. Khamehchi, Chunlei Qu, M. E. Mossman +2
The quantum emulation of spin-momentum coupling (SMC), a crucial ingredient for the emergence of topological phases, is currently drawing considerable interest. In previous quantum…
1D topological chains with Majorana fermions in 2D non-topological optical lattices
Lei Jiang, Chunlei Qu, Chuanwei Zhang
The recent experimental realization of 1D equal Rashba-Dresselhaus spin-orbit coupling (ERD-SOC) for cold atoms provide a disorder-free platform for the implementation and observat…
Quantum phases of Bose-Einstein condensates with synthetic spin - orbital-angular-momentum coupling
Chunlei Qu, Kuei Sun, Chuanwei Zhang
The experimental realization of emergent spin-orbit coupling through laser-induced Raman transitions in ultracold atoms paves the way for exploring novel superfluid physics and sim…
Stueckelberg interferometry using periodically driven spin-orbit coupled Bose-Einstein condensates
Abraham J. Olson, David B. Blasing, Chunlei Qu +4
We study the single-particle dispersion of a spin-orbit coupled (SOC) Bose-Einstein condensate (BEC) under the periodical modulation of the Raman coupling. This modulation introduc…
Fulde-Ferrell Superfluids without Spin Imbalance in Driven Optical Lattices
Zhen Zheng, Chunlei Qu, Xubo Zou +1
Spin-imbalanced ultracold Fermi gases have been widely studied recently as a platform for exploring the long-sought Fulde-Ferrell-Larkin-Ovchinnikov superfluid phases, but so far c…
Tunable Spin-Orbit Coupling via Strong Driving in Ultracold Atom Systems
K. Jiménez-García, L. J. LeBlanc, R. A. Williams +5
Spin-orbit coupling (SOC) is an essential ingredient in topological materials, conventional and quantum-gas based alike.~Engineered spin-orbit coupling in ultracold atom systems --…
Spin - orbital-angular-momentum coupling in Bose-Einstein condensates
Kuei Sun, Chunlei Qu, Chuanwei Zhang
Spin-orbit coupling (SOC) plays a crucial role in many branches of physics. In this context, the recent experimental realization of the coupling between spin and linear momentum of…