Dynamical suppression of tunneling and spin switching of a spin-orbit-coupled atom in a double-well trap

Abstract

We predict wide-band suppression of tunneling of spin-orbit-coupled atoms (or noninteracting Bose-Einstein condensate) in a double-well potential with periodically varying depths of the potential wells. The suppression of tunneling is possible for a single state and for superposition of two states, i.e. for a qbit. By varying spin-orbit coupling one can drastically increase the range of modulation frequencies in which an atom remains localized in one of the potential wells, the effect connected with crossing of energy levels. This range of frequencies is limited because temporal modulation may also excite resonant transitions between lower and upper states in different wells. The resonant transitions enhance tunneling and are accompanied by pseudo-spin switching. Since the frequencies of the resonant transitions are independent of potential modulation depth, in contrast to frequencies at which suppression of tunneling occurs, by varying this depth one can dynamically control both spatial localization and pseudo-spin of the final state.

arXiv comment7 pages, 5 figures, Phys. Rev. A accepted

References in corpus (22)

• A spin-orbit coupled Bose-Einstein condensate
• Spin-orbit coupling in quantum gases
• Periodically-driven quantum systems: Effective Hamiltonians and engineered gauge fields
• Light propagation and localization in modulated photonic lattices and waveguides
• Classical bifurcation at the transition from Rabi to Josephson dynamics
• Nonlinear Josephson-type oscillations of a driven, two-component Bose-Einstein condensate
• Visualization of Coherent Destruction of Tunneling in an Optical Double Well System
• Unconventional states of bosons with synthetic spin-orbit coupling
• Inhibition of light tunneling in waveguide arrays
• Tunable spin-orbit coupling synthesized with a modulating gradient magnetic field
• Bose-Einstein Condensates in Spin-Orbit Coupled Optical Lattices: Flat Bands and Superfluidity
• Spin dynamics in a strongly driven system: very slow Rabi oscillations
• Josephson dynamics of a spin-orbit coupled Bose-Einstein condensate in a double well potential
• Bloch Oscillations in Optical and Zeeman Lattices in the Presence of Spin-Orbit Coupling
• Josephson physics of spin-orbit coupled elongated Bose-Einstein condensates
• Nonlinearity-induced broadening of resonances in dynamically modulated couplers
• Spinor BECs in a double-well: population transfer and Josephson oscillations
• Spin-orbit coupled Bose-Einstein condensates in a double well
• Pulse-pumped double quantum dot with spin-orbit coupling
• Dynamic localization in optical and Zeeman lattices in the presence of spin-orbit coupling
• Spinor Bose-Einstein condensates in double well potentials
• Spin-driven spatial symmetry breaking of spinor condensates in a double-well

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• Topological excitations in rotating Bose-Einstein condensates with Rashba-Dresselhaus spin-orbit coupling in a two-dimensional optical lattice
• Flat bands and dynamical localization of spin-orbit coupled Bose-Einstein condensates
• Controlling directed atomic motion and second-order tunneling of a spin-orbit-coupled atom in optical lattices
• Spin Josephson effects of spin-orbit-coupled Bose-Einstein condensates in a non-Hermitian double well
• Effect of spin-orbit coupling on tunnelling escape of Bose-Einstein condensate
• Collective modes of two-species Bose-Einstein condensates in a Josephson junction barrier
• Nonlinear dynamics of wave packets in tunnel-coupled harmonic-oscillator traps
• Strong-field molecular alignment mediated by nonadiabatic charge localization