Decoherence of the flux-based superconducting qubit in an integrated circuit environment

Details Decoherence of the flux-based superconducting qubit in an integrated circuit environment Decoherence of the flux-based superconducting qubit in an integrated circuit environment

2003-04-04

arxiv.org/abs/quant-ph/0304045v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

Superconducting, flux-based qubits are promising candidates for the construction of a large scale quantum computer. We present an explicit quantum mechanical calculation of the coherent behavior of a flux based quantum bit in a noisy experimental environment such as an integrated circuit containing bias and control electronics. We show that non-thermal noise sources, such as bias current fluctuations and magnetic coupling to nearby active control circuits, will cause decoherence of a flux-based qubit on a timescale comparable to recent experimental coherence time measurements.

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