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Title: Superfluid qubit systems with ring shaped optical lattices
Authors: Auksztol, Filip
Crepaz, Herbert
Amico, Luigi
Aghamalyan, Davit
Dumke, Rainer
Kwek, Leong Chuan
Keywords: DRNTU::Science::Physics::Atomic physics
Issue Date: 2014
Source: Amico, L., Aghamalyan, D., Auksztol, F., Crepaz, H., Dumke, R., & Kwek, L. C. (2014). Superfluid qubit systems with ring shaped optical lattices. Scientific Reports, 4, 4298-.
Series/Report no.: Scientific reports
Abstract: We study an experimentally feasible qubit system employing neutral atomic currents. Our system is based on bosonic cold atoms trapped in ring-shaped optical lattice potentials. The lattice makes the system strictly one dimensional and it provides the infrastructure to realize a tunable ring-ring interaction. Our implementation combines the low decoherence rates of neutral cold atoms systems, overcoming single site addressing, with the robustness of topologically protected solid state Josephson flux qubits. Characteristic fluctuations in the magnetic fields affecting Josephson junction based flux qubits are expected to be minimized employing neutral atoms as flux carriers. By breaking the Galilean invariance we demonstrate how atomic currents through the lattice provide an implementation of a qubit. This is realized either by artificially creating a phase slip in a single ring, or by tunnel coupling of two homogeneous ring lattices. The single qubit infrastructure is experimentally investigated with tailored optical potentials. Indeed, we have experimentally realized scaled ring-lattice potentials that could host, in principle, n ~ 10 of such ring-qubits, arranged in a stack configuration, along the laser beam propagation axis. An experimentally viable scheme of the two-ring-qubit is discussed, as well. Based on our analysis, we provide protocols to initialize, address, and read-out the qubit.
ISSN: 2045-2322
DOI: 10.1038/srep04298
Rights: This work is licensed under a Creative Commons Attribution 3.0 Unported license. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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