Readout of the atomtronic quantum interference device
arXiv:1707.09184 · doi:10.1103/PhysRevA.97.013633
Abstract
A Bose-Einstein condensate confined in ring shaped lattices interrupted by a weak link and pierced by an effective magnetic flux defines the atomic counterpart of the superconducting quantum interference device: the atomtronic quantum interference device (AQUID). In this paper, we report on the detection of current states in the system through a self-heterodyne protocol. Following the original proposal of the NIST and Paris groups, the ring-condensate many-body wave function interferes with a reference condensate expanding from the center of the ring. We focus on the rf-AQUID which realizes effective qubit dynamics. Both the Bose-Hubbard and Gross-Pitaevskii dynamics are studied. For the Bose-Hubbard dynamics, we demonstrate that the self-heterodyne protocol can be applied, but higher-order correlations in the evolution of the interfering condensates are measured to readout of the current states of the system. We study how states with macroscopic quantum coherence can be told apart analyzing the noise in the time of flight of the ring condensate.
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- Topological pumping in Aharonov-Bohm rings
- Probing the BCS-BEC crossover with persistent currents
- Perspective on new implementations of atomtronic circuits
- Persistent current oscillations in a double-ring quantum gas
- Photovoltaic Effect of Atomtronics Induced by Artificial Gauge Field
- Monitoring currents in cold-atom circuits
- Andreev-reflection and Aharonov-Bohm dynamics in atomtronic circuits
- Persistent currents in ultracold gases
- Bosonic Double Ring Lattice Under Artificial Gauge Fields
- Atomtronic multi-terminal Aharonov-Bohm interferometer
- Persistent currents in Bose-Bose mixtures after an interspecies interaction quench
- Single-particle versus many-body phase coherence in an interacting Fermi gas
- Nonclassical states in strongly correlated bosonic ring ladders
- Interference dynamics of matter-waves of SU() fermions
- Tunable quantum switcher and router of cold atom matter waves using artificial magnetic fields
- Exact one-particle density matrix for SU() fermionic matter-waves in the strong repulsive limit
- Static properties of two linearly coupled discrete circuits
- dc atomtronic quantum interference device: quantum superposition of persistent-current states and a parity-protected qubit
- The Atomic Superfluid Quantum Interference Device with tunable Josephson Junctions
- Mesoscopic electron transport and atomic gases, a review of Frank W. J. Hekking's scientific work