Quantum decoherence in qubit devices

Howard E. Brandt

doi:10.1117/1.601860

1 February 1998 Quantum decoherence in qubit devices

Howard E. Brandt

Optical Engineering, Vol. 37, Issue 2, (February 1998). https://doi.org/10.1117/1.601860

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.

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Howard E. Brandt "Quantum decoherence in qubit devices," Optical Engineering 37(2), (1 February 1998). https://doi.org/10.1117/1.601860

Published: 1 February 1998

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