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Dynamics for the Haldane phase in the Bilinear-Biquadratic Model
Arya Dhar, Daniel Jaschke, Lincoln D. Carr
The BBM is a promising candidate to study spin-one systems and to design quantum simulators based on its underlying Hamiltonian. The variety of different phases contains amongst ot…
Quantum Phases and Correlations Drive the Dynamics of Macroscopic Quantum Tunneling Escape in Quantum Simulators
Diego A. Alcala, Marie A. McLain, Lincoln D. Carr
Quantum tunneling remains unexplored in many regimes of many-body quantum physics, including the effect of quantum phase transitions on tunneling dynamics. In general, the quantum…
Internal Oscillations of a Dark-Bright Soliton in a Harmonic Potential
Majed O. D. Alotaibi, Lincoln D. Carr
We investigate the dynamics of a dark-bright soliton in a harmonic potential using a mean-field approach via coupled nonlinear Schrödinger equations appropriate to multicomponent B…
Quantum phase transition modulation in an atomtronic Mott switch
Marie A. McLain, Lincoln D. Carr
Mott insulators provide stable quantum states and long coherence times to due to small number fluctuations, making them good candidates for quantum memory and atomic circuits. We p…
Macroscopic quantum escape of Bose-Einstein condensates: Analysis of experimentally realizable quasi-one-dimensional traps
Diego A. Alcala, Gregor Urban, Matthias Weidemüller +1
The variational-JWKB method is used to determine experimentally accessible macroscopic quantum tunneling regimes of quasi-bound Bose-Einstein condensates in two quasi one-dimension…
Thermalization in the Quantum Ising Model - Approximations, Limits, and Beyond
Daniel Jaschke, Lincoln D. Carr, Ines de Vega
We present quantitative predictions for quantum simulator experiments on Ising models from trapped ions to Rydberg chains and show how the thermalization, and thus decoherence time…
Scattering of a dark-bright soliton by an impurity
Majed O. D. Alotaibi, Lincoln D. Carr
We study the dynamics of a dark-bright soliton interacting with a fixed impurity using a mean-field approach. The system is described by a vector nonlinear Schrodinger equation (NL…
One-dimensional many-body entangled open quantum systems with tensor network methods
Daniel Jaschke, Simone Montangero, Lincoln D. Carr
We present a collection of methods to simulate entangled dynamics of open quantum systems governed by the Lindblad equation with tensor network methods. Tensor network methods usin…
For high-precision bosonic Josephson junctions, many-body effects matter
Marie A. McLain, Diego A. Alcala, Lincoln D. Carr
Typical treatments of superconducting or superfluid Josephson junctions rely on mean-field or two-mode models; we explore many-body dynamics of an isolated, ultracold, Bose-gas lon…
Non-Hamiltonian Kelvin wave generation on vortices in Bose-Einstein condensates
Scott A. Strong, Lincoln D. Carr
Ultra-cold quantum turbulence is expected to decay through a cascade of Kelvin waves. These helical excitations couple vorticity to the quantum fluid causing long wavelength phonon…
Open source Matrix Product States: Exact diagonalization and other entanglement-accurate methods revisited in quantum systems
Daniel Jaschke, Lincoln D. Carr
Tensor network methods as presented in our open source Matrix Product States software have opened up the possibility to study many-body quantum physics in one and quasi-one-dimensi…
Non-Hamiltonian Dynamics of Quantized Vortices in Bose-Einstein Condensates
Scott A. Strong, Lincoln D. Carr
The dynamics of quantized vortices in weakly interacting superfluids are often modeled by a nonlinear Schrödinger equation. In contrast, we show that quantized vortices in fact obe…
Absence of Landau damping in driven three-component Bose-Einstein condensate in optical lattices
Gavriil Shchedrin, Daniel Jaschke, Lincoln D. Carr
We explore the quantum many-body physics of a three-component Bose-Einstein condensate (BEC) in an optical lattices driven by laser fields in and configurations. We obtain…
Macroscopic Quantum Tunneling Escape of Bose-Einstein Condensates
Xinxin Zhao, Diego A. Alcala, Marie A. McLain +5
Recent experiments on macroscopic quantum tunneling reveal a non-exponential decay of the number of atoms trapped in a quasibound state behind a potential barrier. Through both exp…
Nonequilibrium quantum dynamics of partial symmetry breaking for ultracold bosons in an optical lattice ring trap
Xinxin Zhao, Marie A. McLain, J. Vijande +3
A vortex in a Bose-Einstein condensate on a ring undergoes quantum dynamics in response to a quantum quench in terms of partial symmetry breaking from a uniform lattice to a biperi…
Open source Matrix Product States: Opening ways to simulate entangled many-body quantum systems in one dimension
Daniel Jaschke, Michael L. Wall, Lincoln D. Carr
Numerical simulations are a powerful tool to study quantum systems beyond exactly solvable systems lacking an analytic expression. For one-dimensional entangled quantum systems, te…
Higher-order quantum bright solitons in Bose-Einstein condensates show truly quantum emergent behavior
Christoph Weiss, Lincoln D. Carr
When an interaction quench by a factor of four is applied to an attractive Bose-Einstein condensate, a higher-order quantum bright soliton exhibiting robust oscillations is predict…
Many-body Quantum Chaos and Entanglement in a Quantum Ratchet
Marc Andrew Valdez, Gavriil Shchedrin, Martin Heimsoth +3
We uncover signatures of quantum chaos in the many-body dynamics of a Bose-Einstein condensate-based quantum ratchet in a toroidal trap. We propose measures including entanglement,…
Critical Phenomena and Kibble-Zurek Scaling in the Long-Range Quantum Ising Chain
Daniel Jaschke, Kenji Maeda, Joseph D. Whalen +2
We investigate an extension of the quantum Ising model in one spatial dimension including long-range interactions in its statics and dynamics with possible applications f…
Damping-free collective oscillations of a driven two-component Bose gas in optical lattices
Gavriil Shchedrin, Daniel Jaschke, Lincoln D. Carr
We explore quantum many-body physics of a driven Bose-Einstein condensate in optical lattices. The laser field induces a gap in the generalized Bogoliubov spectrum proportional to…
Dynamics of Vector Solitons in Bose-Einstein Condensates
Majed O. D. Alotaibi, Lincoln D. Carr
We analyze the dynamics of two-component vector solitons, namely bright-in-dark solitons, via the variational approximation in Bose-Einstein condensates. The system is described by…
Entangled Dynamics in Macroscopic Quantum Tunneling of Bose-Einstein Condensates
Diego A. Alcala, Joseph A. Glick, Lincoln D. Carr
Tunneling of a quasibound state is a non-smooth process in the entangled many-body case. Using time-evolving block decimation, we show that repulsive (attractive) interactions spee…
Realizing unconventional quantum magnetism with symmetric top molecules
M. L. Wall, K. Maeda, L. D. Carr
We demonstrate that ultracold symmetric top molecules loaded into an optical lattice can realize highly tunable and unconventional models of quantum magnetism, such as an XYZ Heise…
Hyperfine structure of the hydroxyl free radical (OH) in electric and magnetic fields
Kenji Maeda, Michael L Wall, Lincoln D Carr
We investigate single-particle energy spectra of the hydroxyl free radical (OH) in the lowest electronic and rovibrational level under combined static electric and magnetic fields,…