Superfluid Oscillator Circuit with Quantum Current Regulator
arXiv:2403.19191 · doi:10.1103/PhysRevA.109.043312
Abstract
We examine the properties of atomic current in a superfluid oscillating circuit consisting of a mesoscopic channel that connects two reservoirs of a Bose-Einstein condensate. We investigate the presence of a critical current in the channel and examine how the amplitude of the oscillations in the number imbalance between the two reservoirs varies with system parameters. In addition to highlighting that the dissipative resistance stems from the formation of vortex pairs, we also illustrate the role of these vortex pairs as a quantum current regulator. The dissipation strength is discrete based on the number imbalance, which corresponds to the emergence of vortex pairs in the system. Our findings indicate that the circuit demonstrates characteristics of both voltage-limiting and current-limiting mechanisms. To model the damping behavior of the atomic superfluid circuit, we develop an equivalent LC oscillator circuit with a quantum current regulator.
arXiv comment6 figures
References in corpus (46)
- Quantum metrology with nonclassical states of atomic ensembles
- Evidence for a critical velocity in a Bose-Einstein condensed gas
- Atom Chips
- A thermoelectric heat engine with ultracold atoms
- Experimental realization of Josephson junctions for an Atom SQUID
- Atomtronics: ultracold atom analogs of electronic devices
- Quantum many particle systems in ring-shaped optical lattices
- Tunable Landau-Zener transitions in a spin-orbit coupled Bose-Einstein condensate
- The Vortex Phase Qubit: Generating Arbitrary, Counter-Rotating, Coherent Superpositions in Bose-Einstein Condensates via Optical Angular Momentum Beams
- Josephson effect in fermionic superfluids across the BEC-BCS crossover
- Atomtronic circuits: from many-body physics to quantum technologies
- Relaxation to a Phase-locked Equilibrium State in a One-dimensional Bosonic Josephson Junction
- Negative differential conductivity in an interacting quantum gas
- Realization of a superconducting atom chip
- Observing the Drop of Resistance in the Flow of a Superfluid Fermi Gas
- Transistor-Like Behavior of a Bose-Einstein Condensate in a Triple Well Potential
- Connecting dissipation and phase slips in a Josephson junction between fermionic superfluids
- Persistent Supercurrent Atom Chip
- An ideal Josephson junction in an ultracold two-dimensional Fermi gas
- Macroscopic superpositions of superfluid flows
- Bose-Einstein condensate as a quantum memory for a photonic polarization qubit
- Open quantum systems approach to atomtronics
- Tunneling transport of unitary fermions across the superfluid transition
- Critical transport and vortex dynamics in a thin atomic Josephson junction
- Contact resistance and phase slips in mesoscopic superfluid atom transport
- Spin Field Effect Transistors with Ultracold Atoms
- An Atomtronic Flux Qubit: A ring lattice of Bose-Einstein condensates interrupted by three weak links
- Experimental demonstration of an atomtronic battery
- Storing short single-photon-level optical pulses in Bose-Einstein condensates for high-performance quantum memory
- Quantitative acoustic models for superfluid circuits
- Sensitivity of ultracold atoms to quantized flux in a superconducting ring
- Dynamical excitations in the collision of 2D Bose-Einstein condensates
- Principles of an atomtronic transistor
- The Aharonov-Bohm effect in mesoscopic Bose-Einstein condensates
- Anomalous Conductance of a strongly interacting Fermi Gas through a Quantum Point Contact
- A Molecular Matter-Wave Amplifier
- Superfluid to Mott transition in a Bose-Hubbard ring: Persistent currents and defect formation
- Superfluid transport dynamics in a capacitive atomtronic circuit
- Quantum switching at a mean-field instability of a Bose-Einstein condensate in an optical lattice
- Quantized conductance through the quantum evaporation of bosonic atoms
- Dynamics of vortex quadrupoles in nonrotating trapped Bose-Einstein condensate
- Atomtronic multi-terminal Aharonov-Bohm interferometer
- Proposal for a long-lived quantum memory using matter-wave optics with Bose-Einstein condensates in microgravity
- Collective oscillations of a Bose-Einstein condensate induced by a vortex ring
- Matterwaves, Matterons, and the Atomtronic Transistor Oscillator
- Structure and dynamics of binary Bose-Einstein condensates with vortex phase imprinting