Challenges and constraints of dynamically emerged source and sink in atomtronic circuits: From closed-system to open-system approaches

Abstract

While batteries offer electronic source and sink in electronic devices, atomic analogues of source and sink and their theoretical descriptions have been a challenge in cold-atom systems. Here we consider dynamically emerged local potentials as controllable source and sink for bosonic atoms. Although a sink potential can collect bosons in equlibrium and indicate its usefulness in the adiabatic limit, sudden switching of the potential exhibits low effectiveness in pushing bosons into it. This is due to conservation of energy and particle in isolated systems such as cold atoms. By varying the potential depth and interaction strength, the systems can further exhibit averse response, where a deeper emerged potential attracts less bosonic atoms into it. To explore possibilities for improving the effectiveness, we investigate what types of system-environment coupling can help bring bosons into a dynamically emerged sink, and a Lindblad operator corresponding to local cooling is found to serve the purpose.

15 pages, 7 figures

References in corpus (21)

• The density-matrix renormalization group in the age of matrix product states
• Real time evolution using the density matrix renormalization group
• Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
• Quantum trajectories and open many-body quantum systems
• Observation of Quantized Conductance in Neutral Matter
• C programs for solving the time-dependent Gross-Pitaevskii equation in a fully anisotropic trap
• Non-equilibrium dynamics of bosonic atoms in optical lattices: Decoherence of many-body states due to spontaneous emission
• Interaction effects and quantum phase transitions in topological insulators
• Interaction-induced impeding of decoherence and anomalous diffusion
• Approach to steady state transport in nanoscale conductors
• Observing the Drop of Resistance in the Flow of a Superfluid Fermi Gas
• Dark state cooling of atoms by superfluid immersion
• Time evolution of one-dimensional Quantum Many Body Systems
• The fidelity approach to the Hubbard model
• Dissipative dynamics of atomic Hubbard models coupled to a phonon bath: Dark state cooling of atoms within a Bloch band of an optical lattice
• Nonequilibrium relaxation transport of ultracold atoms
• Controlling Transport of Ultra-Cold Atoms in 1D Optical Lattices with Artificial Gauge Fields
• Quantum ultra-cold atomtronics
• Phase-induced transport in atomic gases: from superfluid to Mott insulator
• Negative differential conductivity and quantum statistical effects in a three-site Bose-Hubbard model
• Site-wise manipulations and Mott insulator-superfluid transition of interacting photons using superconducting circuit simulators

Cited by in corpus (7)

• OpenMP GNU and Intel Fortran programs for solving the time-dependent Gross-Pitaevskii equation
• Photovoltaic Effect of Atomtronics Induced by Artificial Gauge Field
• Simulation of many-electron systems that exchange matter with the environment
• Advances in atomtronics
• Quantification of the memory effect of steady-state currents from interaction-induced transport in quantum systems
• Optical absorption spectroscopy in hybrid systems of plasmons and excitons
• Third quantization with Hartree approximation for open-system bosonic transport