Interferometric measurement of the current-phase relationship of a superfluid weak link
arXiv:1406.1095 · doi:10.1103/PhysRevX.4.031052
Abstract
Weak connections between superconductors or superfluids can differ from classical links due to quantum coherence, which allows flow without resistance. Transport properties through such weak links can be described with a single function, the current-phase relationship, which serves as the quantum analog of the current-voltage relationship. Here, we present a technique for inteferometrically measuring the current-phase relationship of superfluid weak links. We interferometrically measure the phase gradient around a ring-shaped superfluid Bose-Einstein condensate (BEC) containing a rotating weak link, allowing us to identify the current flowing around the ring. While our BEC weak link operates in the hydrodynamic regime, this technique can be extended to all types of weak links (including tunnel junctions) in any phase-coherent quantum gas. Moreover, it can also measure the current-phase relationships of excitations. Such measurements may open new avenues of research in quantum transport.
6 pages, 4 figures. Contact S. Eckel (below) for supplemental information
References in corpus (4)
Cited by in corpus (44)
- Tunable non-reciprocal quantum transport through a dissipative Aharonov-Bohm ring in ultracold atoms
- Atomtronic circuits: from many-body physics to quantum technologies
- Coherent superposition of current flows in an Atomtronic Quantum Interference Device
- Imprinting persistent currents in tunable fermionic rings
- Persistent currents in rings of ultracold fermionic atoms
- Exploring the Kibble-Zurek mechanism with homogeneous Bose gases
- Quantum simulation of non-trivial topology
- Vortices in a toroidal Bose-Einstein condensate with a rotating weak link
- Nonlinear dynamics in a synthetic momentum state lattice
- Quantized superfluid vortex dynamics on cylindrical surfaces and planar annuli
- Temperature induced decay of persistent currents in a superfluid ultracold gas
- Vortex excitation in a stirred toroidal Bose-Einstein condensate
- Perspective on new implementations of atomtronic circuits
- Talbot-enhanced, maximum-visibility imaging of condensate interference
- Superflow decay in a toroidal Bose gas: The effect of quantum and thermal fluctuations
- Persistent current oscillations in a double-ring quantum gas
- Making ghost vortices visible in two-component Bose-Einstein condensates
- Metastability, excitations, fluctuations, and multiple-swallowtail structures of a superfluid in a Bose-Einstein condensate in the presence of a uniformly moving defect
- Generation of high winding-number superfluid circulation in Bose-Einstein condensates
- Massive superfluid vortices and vortex necklaces on a planar annulus
- Resonant persistent currents for ultracold bosons on a lattice ring
- Optimizing persistent currents in a ring-shaped Bose-Einstein condensate using machine learning
- Rotation and Angular Momentum Transfer in Bose-Einstein Condensates Induced by Spiral Dark Solitons
- Persistent currents in Bose-Bose mixtures after an interspecies interaction quench
- Feedback cooled Bose-Einstein condensation: near and far from equilibrium
- Dynamical phase diagram of a one dimensional Bose gas in a box with a tunable weak-link: from Bose-Josephson oscillations to shock waves
- Single-particle versus many-body phase coherence in an interacting Fermi gas
- Interference dynamics of matter-waves of SU() fermions
- Tuning the Drude weight of Dirac-Weyl fermions in one-dimensional ring traps
- Ballistic transport of a polariton ring condensate with spin precession
- Viability of rotation sensing using phonon interferometry in Bose-Einstein condensates
- Persistent currents in a strongly interacting multicomponent Bose gas on a ring
- Stationary states of Bose-Einstein condensed atoms rotating in an asymmetric ring potential
- Rotation Sensitive Quench and Revival of Coherent Oscillations in a Ring Lattice
- Metastable spin textures and Nambu-Goldstone modes of a ferromagnetic spin-1 Bose-Einstein condensate confined in a ring trap
- Unidirectional spin transport of a spin-orbit-coupled atomic matter wave using a moving Dirac -potential well
- Parity Symmetry Breaking and Topological Phases in a Superfluid Ring
- Single-fluid model for rotating annular supersolids and its experimental implications
- Atom Interferometric Imaging of Differential Potentials Using an Atom Laser
- Drude weights in one-dimensional systems with a single defect
- Increasing the stability of a superfluid in a rotating necklace potential
- Theoretical description of atomtronic Josephson junctions in an optical lattice
- A versatile ring trap for quantum gases
- Dynamically generating superflow in a bosonic ring via phase imprinting