Dephasing of a superconducting qubit induced by photon noise

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dc.creatorBertet, P.
dc.creatorChiorescu, I.
dc.creatorBurkard, G.
dc.creatorSemba, K.
dc.creatorHarmans, C. J. P. M.
dc.creatorDiVincenzo, D. P.
dc.creatorMooij, J. E.
dc.date2005-12-18
dc.date.accessioned2026-07-07T06:53:29Z
dc.date.available2026-07-07T06:53:29Z
dc.descriptionWe have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their effective coupling strength. This allowed us to measure the effect of such a controllable and well-characterized environment on the qubit coherence. We can quantitatively account for our data with a simple model in which thermal fluctuations of the photon number in the oscillator are the limiting factor. In particular, we observe a strong reduction of the dephasing rate whenever the coupling is tuned to zero. At the optimal point we find a large spin-echo decay time of $4 μs$.
dc.descriptionNew version of earlier paper arXiv/0507290 after in-depth rewriting
dc.identifierhttps://arxiv.org/abs/cond-mat/0512428
dc.identifierhttp://arxiv.org/abs/cond-mat/0512428
dc.identifierPhys. Rev. Lett. 95, 257002 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.257002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105602
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleDephasing of a superconducting qubit induced by photon noise
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