Experimental observation of the breaking and recombination of single Cooper pairs

N.J. Lambert; M. Edwards; A.A. Esmail; F.A. Pollock; S.D. Barrett; B.W. Lovett; A.J. Ferguson

doi:10.1103/PhysRevB.90.140503

Experimental observation of the breaking and recombination of single Cooper pairs

N.J. Lambert, M. Edwards, A.A. Esmail, F.A. Pollock, S.D. Barrett, B.W. Lovett, A.J. Ferguson

Research output: Contribution to journal › Article › peer-review

Abstract

We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk films, a multistage recombination pathway is followed.

Original language	English
Journal	Physical Review. B, Condensed matter and materials physics
Volume	90
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.90.140503
Publication status	Published - 9 Oct 2014

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Lovett_2014_PRB_Experimental
© 2014 American Physical Society. Reproduced in accordance with APS transfer of copyright agreement. The final version can also be found via the publisher's website: http://dx.doi.org/10.1103/PhysRevB.90.140503
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title = "Experimental observation of the breaking and recombination of single Cooper pairs",

abstract = "We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk films, a multistage recombination pathway is followed.",

author = "N.J. Lambert and M. Edwards and A.A. Esmail and F.A. Pollock and S.D. Barrett and B.W. Lovett and A.J. Ferguson",

note = "A.J.F. would like to acknowledge the Hitachi Research fellowship, support from Hitachi Cambridge Laboratory, and support from the EPSRC Grant No. EP/H016872/1. B.W.L. is supported by a Royal Society University Research Fellowship. F.A.P. would like to thank the Leverhulme Trust for financial support.",

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AU - Lambert, N.J.

AU - Edwards, M.

AU - Esmail, A.A.

AU - Pollock, F.A.

AU - Barrett, S.D.

AU - Lovett, B.W.

AU - Ferguson, A.J.

N1 - A.J.F. would like to acknowledge the Hitachi Research fellowship, support from Hitachi Cambridge Laboratory, and support from the EPSRC Grant No. EP/H016872/1. B.W.L. is supported by a Royal Society University Research Fellowship. F.A.P. would like to thank the Leverhulme Trust for financial support.

PY - 2014/10/9

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N2 - We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk films, a multistage recombination pathway is followed.

AB - We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk films, a multistage recombination pathway is followed.

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DO - 10.1103/PhysRevB.90.140503

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VL - 90

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 14

ER -

Experimental observation of the breaking and recombination of single Cooper pairs

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