117 citations · 361 across the 24 of their papers we have counts for
24 papers
Nonlinear multi-state tunneling dynamics in a spinor Bose-Einstein condensate
Z. N. Hardesty-Shaw, Q. Guan, J. O. Austin-Harris +3
We present an experimental realization of dynamic self-trapping and non-exponential tunneling in a multi-state system consisting of ultracold sodium spinor gases confined in moving…
Dynamical mean-field driven spinor condensate physics beyond the single-mode approximation
J. Jie, S. Zhong, Q. Zhang +7
Na spin-1 Bose-Einstein condensates are used to experimentally demonstrate that mean-field physics beyond the single-mode approximation can be relevant during the non-equili…
Manipulation of nonequilibrium spin dynamics of an ultracold gas in a moving optical lattice
Zachary N. Hardesty-Shaw, Qingze Guan, Jared O. Austin +3
The isolation and control of disparate degrees of freedom underpin quantum simulators. We advance the programmability of cold atom quantum simulators with a first realization of th…
Many-body localization of one-dimensional degenerate Fermi gases with cavity-assisted non-local quasiperiodic interactions
Jianwen Jie, Qingze Guan, Jian-Song Pan
The localization properties of one-dimensional degenerate Fermi gases with cavity-assisted non-local quasiperiodic interactions are numerically studied. Although the cavity-induced…
Tailored generation of quantum states in an entangled spinor interferometer to overcome detection noise
Q. Guan, G. W. Biedermann, A. Schwettmann +1
We theoretically investigate how entangled atomic states generated via spin-changing collisions in a spinor Bose-Einstein condensate can be designed and controllably prepared for a…
Roaming pathways and survival probability in real-time collisional dynamics of cold and controlled bialkali molecules
J. Klos, Q. Guan, H. Li +3
Perfectly controlled molecules are at the forefront of the quest to explore chemical reactivity at ultra low temperatures. Here, we investigate for the first time the formation of…
Identifying and harnessing dynamical phase transitions for quantum-enhanced sensing
Qingze Guan, Robert J. Lewis-Swan
We use the quantum Fisher information (QFI) to diagnose a dynamical phase transition (DPT) in a closed quantum system, which is usually defined in terms of non-analytic behaviour o…
Magic Conditions for Multiple Rotational States of Bialkali Molecules in Optical Lattices
Q. Guan, S. L. Cornish, S. Kotochigova
We investigate magic-wavelength trapping of ultracold bialkali molecules in the vicinity of weak optical transitions from the vibrational ground state of the X potential to…
Swirling the weakly bound helium dimer from inside
Maksim Kunitski, Qingze Guan, Holger Maschkiwitz +9
Controlling the interactions between atoms with external fields opened up new branches in physics ranging from strongly correlated atomic systems to ideal Bose and Fermi gases and…
Mean-field spin-oscillation dynamics beyond the single-mode approximation for a harmonically trapped spin-1 Bose-Einstein condensate
Jianwen Jie, Q. Guan, S. Zhong +2
Compared to single-component Bose-Einstein condensates, spinor Bose-Einstein condensates display much richer dynamics. In addition to density oscillations, spinor Bose-Einstein con…
Non-exponential tunneling due to mean-field induced swallowtails
Q. Guan, M. K. H. Ome, T. M. Bersano +3
Typically, energy levels change without bifurcating in response to a change of a control parameter. Bifurcations can lead to loops or swallowtails in the energy spectrum. The simpl…
Rabi oscillations and Ramsey-type pulses in ultracold bosons: Role of interactions
Q. Guan, T. M. Bersano, S. Mossman +2
Double-well systems loaded with one, two, or many quantum particles give rise to intriguing dynamics, ranging from Josephson oscillation to self-trapping. This work presents theore…
Nondestructive dispersive imaging of rotationally excited ultracold molecules
Qingze Guan, Michael Highman, Eric J. Meier +5
A barrier to realizing the potential of molecules for quantum information science applications is a lack of high-fidelity, single-molecule imaging techniques. Here, we present and…
Energetics and structural properties of two- and three-boson systems in the presence of 1D spin-orbit coupling
Qingze Guan, Doerte Blume
It was shown recently that the discrete scaling symmetry, which underlies the Efimov effect in the three identical boson system with two-body short-range interactions, survives whe…
Spinor Bose-Einstein Condensate Interferometer within the Undepleted Pump Approximation: Role of the Initial State
Jianwen Jie, Q. Guan, D. Blume
Most interferometers operate with photons or dilute, non-condensed cold atom clouds in which collisions are strongly suppressed. Spinor Bose-Einstein condensates (BECs) provide an…
Electric-field induced helium-helium resonances
Qingze Guan, Doerte Blume
The tunability of the helium-helium interaction through an external electric field is investigated. For a static external field, electric-field induced resonances and associated el…
Density Oscillations Induced by Individual Ultracold Two-Body Collisions
Q. Guan, V. Klinkhamer, R. Klemt +5
Access to single-particle momenta provides new means of studying the dynamics of a few interacting particles. In a joint theoretical and experimental effort, we observe and analyze…
K-matrix formulation of two-particle scattering in a wave guide in the presence of one-dimensional spin-orbit coupling
Su-Ju Wang, Q. Guan, D. Blume
The creation of artificial gauge fields in neutral ultracold atom systems has opened the possibility to study the effects of spin-orbit coupling terms in clean environments. This w…
Three-boson spectrum in the presence of 1D spin-orbit coupling: Efimov's generalized radial scaling law
Q. Guan, D. Blume
Spin-orbit coupled cold atom systems, governed by Hamiltonians that contain quadratic kinetic energy terms typical for a particle's motion in the usual Schrödinger equation and lin…
Analytical coupled-channels treatment of two-body scattering in the presence of three-dimensional isotropic spin-orbit coupling
Q. Guan, D. Blume
It is shown that the single-particle spin-orbit coupling terms, which---in the cold atom context---are associated with synthetic gauge fields, can significantly and non-trivially m…
Scattering framework for two particles with isotropic spin-orbit coupling applicable to all energies
Q. Guan, D. Blume
Previous work developed a K-matrix formalism applicable to positive energies for the scattering between two -wave interacting particles with two internal states, isotropic spin-…
Spin structure of harmonically trapped one-dimensional atoms with spin-orbit coupling
Q. Guan, D. Blume
We introduce a theoretical approach to determine the spin structure of harmonically trapped atoms with two-body zero-range interactions subject to an equal mixture of Rashba and Dr…
Tunable spin-orbit coupling synthesized with a modulating gradient magnetic field
Xinyu Luo, Lingna Wu, Jiyao Chen +5
We report the observation of tunable spin-orbit coupling (SOC) for ultracold Rb atoms in hyperfine spin-1 states. Different from most earlier experiments where atomic SOC of…
Energy spectrum of a harmonically trapped two-atom system with spin-orbit coupling
Q. Guan, X. Y. Yin, S. E. Gharashi +1
Ultracold atomic gases provide a novel platform with which to study spin-orbit coupling, a mechanism that plays a central role in the nuclear shell model, atomic fine structure and…