Controlling directed atomic motion and second-order tunneling of a spin-orbit-coupled atom in optical lattices
arXiv:2011.01399 · doi:10.1103/PhysRevA.103.043315
Abstract
We theoretically explore the tunneling dynamics for the tight-binding (TB) model of a single spin-orbit-coupled atom trapped in an optical lattice subjected to lattice shaking and to time-periodic Zeeman field. By means of analytical and numerical methods, we demonstrate that the spin-orbit (SO) coupling adds some new results to the tunneling dynamics in both multiphoton resonance and far-off-resonance parameter regimes. When the driving frequency is resonant with the static Zeeman field (multi-photon resonances), we obtain an unexpected new dynamical localization (DL) phenomenon where the single SO-coupled atom is restricted to making perfect two-site Rabi oscillation accompanied by spin flipping.By using the unconventional DL phenomenon, we are able to generate a ratchetlike effect which enables directed atomic motion towards different directions and accompanies periodic spin-flipping under the action of SO coupling. For the far-off-resonance case, we show that by suppressing the usual inter-site tunneling alone, it is possible to realize a type of spin-conserving second-order tunneling between next-nearest-neighboring sites, which is not accessible in the conventional lattice system without SO coupling. We also show that simultaneous controls of the usual inter-site tunneling and the SO-coupling-related second-order-tunneling are necessary for quasienergies flatness (collapse) and completely frozen dynamics to exist. These results may be relevant to potential applications such as spin-based quantum information processing and design of novel spintronics devices.
arXiv comment12 pages, 7 figures
References in corpus (40)
- Spintronics: Fundamentals and applications
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- A spin-orbit coupled Bose-Einstein condensate
- Universal High-Frequency Behavior of Periodically Driven Systems: from Dynamical Stabilization to Floquet Engineering
- Atomic quantum gases in periodically driven optical lattices
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Realization of Two-Dimensional Spin-orbit Coupling for Bose-Einstein Condensates
- Dynamical control of matter-wave tunneling in periodic potentials
- Collective Dipole Oscillation of a Spin-Orbit Coupled Bose-Einstein Condensate
- Experimental realization of a two-dimensional synthetic spin-orbit coupling in ultracold Fermi gases
- Observation of dynamic localization in periodically-curved waveguide arrays
- Wannier-Stark resonances in optical and semiconductor superlattices
- Effective Hamiltonians for periodically driven systems
- Exploring dynamic localization with a Bose-Einstein condensate
- Bose Hubbard Models with Synthetic Spin-Orbit Coupling: Mott Insulators, Spin Textures and Superfluidity
- Tunable Spin-Orbit Coupling via Strong Driving in Ultracold Atom Systems
- Spin-orbit coupled Bose-Einstein condensates in a one-dimensional optical lattice
- Exotic quantum spin models in spin-orbit-coupled Mott insulators
- Quantum systems under frequency modulation
- Tunable spin-orbit coupling synthesized with a modulating gradient magnetic field
- Atomic spin-orbit coupling synthesized with magnetic-field-gradient pulses
- Quantum control and entanglement using periodic driving fields
- Magnetic phases of bosons with synthetic spin-orbit coupling in optical lattices
- Tuning the Mott transition in a Bose-Einstein condensate by multi-photon absorption
- Bose-Einstein Condensates in Spin-Orbit Coupled Optical Lattices: Flat Bands and Superfluidity
- Universal Quantum Computation through Control of Spin-Orbit Coupling
- Spin dynamics in a strongly driven system: very slow Rabi oscillations
- Freezing a Quantum Magnet by Repeated Quantum Interference: An Experimental Realization
- Anderson Localization of cold atomic gases with effective spin-orbit interaction in a quasiperiodic optical lattice
- Bloch Oscillations in Optical and Zeeman Lattices in the Presence of Spin-Orbit Coupling
- Tunable spin-orbit coupled Bose-Einstein condensates in deep optical lattices
- From Anderson to anomalous localization in cold atomic gases with effective spin-orbit coupling
- Solitons and Josephson-type oscillations in Bose-Einstein condensates with spin-orbit coupling and time-varying Raman frequency
- Coherent perfect absorbers for transient, periodic or chaotic optical fields: time-reversed lasers beyond threshold
- Flat bands and dynamical localization of spin-orbit coupled Bose-Einstein condensates
- Dynamical suppression of tunneling and spin switching of a spin-orbit-coupled atom in a double-well trap
- Second order tunneling of two interacting bosons in a driven triple well
- Dynamic localization in optical and Zeeman lattices in the presence of spin-orbit coupling
- Dynamics of spin-orbit-coupled cold atomic gases in a Floquet lattice with an impurity