Title:	The effect of environmental coupling on tunneling of quasiparticles in Josephson junctions
Authors:	Ansari, Mohammad H. Wilhelm, Frank K. Sinha, Urbasi Sinha, Aninda
Issue Date:	Dec-2013
Publisher:	IOP Publishing Limited
Citation:	Superconductor Science and Technology, 2013,Vol.26, p125013
Abstract:	We study quasiparticle tunneling in Josephson tunnel junctions embedded in an electromagnetic environment. We identify tunneling processes that transfer electrical charge and couple to the environment in a way similar to that of normal electrons, and processes that mix electrons and holes and are thus creating charge superpositions. The latter are sensitive to the phase difference between the superconductors and are thus limited by phase diffusion even at zero temperature. We show that the environmental coupling is suppressed in many environments, thus leading to lower quasiparticle decay rates and better superconductor qubit coherence than previously expected. Our approach is nonperturbative in the environmental coupling strength
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5958
ISSN:	1361-6668 (online) 0953-2048
Alternative Location:	http://arxiv.org/abs/1211.4745 http://dx.doi.org/10.1088/0953-2048/26/12/125013
Copyright:	2013, IOP Publishing Ltd.
Appears in Collections:	Research Papers (LAMP)

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