Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/17191
Title: Superfluid qubit systems with ring shaped optical lattices
Authors: Amico, Luigi
Aghamalyan, Davit
Auksztol, Filip
Crepaz, Herbert
Dumke, Rainer
Kwek, Leong Chuan
Issue Date: 2014
Citation: 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: doi: 10.1038/srep04298
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.
URI: http://hdl.handle.net/10497/17191
ISSN: 2045-2322
Other Identifiers: 10.1038/srep04298
Website: http://www.nature.com/articles/srep04298
Appears in Collections:Journal Articles

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