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Proceedings Paper

Qubit decoherence
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 qubit device in the unperturbed state without the decoherence arising from environmental interactions. The 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 the ion vibrational modes.

Paper Details

Date Published: 1 July 1997
PDF: 14 pages
Proc. SPIE 3076, Photonic Quantum Computing, (1 July 1997); doi: 10.1117/12.277661
Show Author Affiliations
Howard E. Brandt, U.S. Army Research Lab. at Adelphi (United States)

Published in SPIE Proceedings Vol. 3076:
Photonic Quantum Computing
Steven P. Hotaling; Andrew R. Pirich, Editor(s)

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