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Optical Engineering

Quantum decoherence in qubit devices
Author(s): Howard E. Brandt
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Paper Abstract

We first review the mathematical physics of quantum decoherence in generic single-qubit devices, including environmental interactions. Next, we formulate the persistence probability for a qubit device as the probability of measuring the qubits in their unperturbed state without the decoherence arising from environmental interactions. A decoherence time can be obtained from the persistence probability. Drawing on recent work of Garg, and also Palma, Suomine, and Ekert, we apply the persistence probability formalism to a generic single-qubit device coupled to a thermal environment, and also apply it to a trapped-ion quantum register coupled to its ion vibrational modes.

Paper Details

Date Published: 1 February 1998
PDF: 10 pages
Opt. Eng. 37(2) doi: 10.1117/1.601860
Published in: Optical Engineering Volume 37, Issue 2
Show Author Affiliations
Howard E. Brandt, Army Research Lab. (United States)


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