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Proceedings Paper

Decoherence through superradiance in quantum computers
Author(s): Eugene M Chudnovsky
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Paper Abstract

Normally, the spontaneous emission of photons due to transitions between functional levels of a qubit is not an important decohering factor because of low probability. However, when the distance between the levels corresponds to frequencies below 100GHz, the wavelength of the photons is in the millimeter range or longer. If this range includes N identical qubits, the probability of the photon emission goes up by a factor N due to Dicke superradiance. This can drastically increase the decoherence rate. Numerical examples with spin and SQUID based qubits are given to illustrate this effect.

Paper Details

Date Published: 24 August 2004
PDF: 9 pages
Proc. SPIE 5436, Quantum Information and Computation II, (24 August 2004); doi: 10.1117/12.541528
Show Author Affiliations
Eugene M Chudnovsky, CUNY/Lehman College (United States)

Published in SPIE Proceedings Vol. 5436:
Quantum Information and Computation II
Eric Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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