Dephasing caused by the Thin Spectrum in a BCS Superconductor

Jasper van Wezel, Jeroen van den Brink

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)

Abstract

Recently we have shown that the thin spectrum associated with the process of spontaneous symmetry breaking will lead to a maximum coherence time for many‐particle solid state qubits. In this paper we will discuss how the general mechanism of dephasing caused by a thin spectrum can be applied to the case of BCS superconductors. We will find that the BCS superconducting state is a state of broken global U(1) symmetry, and that the thin spectrum associated with the breaking of this phase symmetry induces dephasing and decoherence within the fundamental timescale τ = 2πNℏ/kBT.
Original languageEnglish
Pages (from-to)332-336
JournalAIP Conference Proceedings
Volume918
DOIs
Publication statusPublished - 2007

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