Controlling the spontaneous emission of a superconducting transmon qubit

A. A. Houck; J. A. Schreier; B. R. Johnson; J. M. Chow; Jens Koch; J. M. Gambetta; D. I. Schuster; L. Frunzio; M. H. Devoret; S. M. Girvin; R. J. Schoelkopf

doi:10.1103/PhysRevLett.101.080502

Controlling the spontaneous emission of a superconducting transmon qubit

A. A. Houck, J. A. Schreier, B. R. Johnson, J. M. Chow, Jens Koch, J. M. Gambetta, D. I. Schuster, L. Frunzio, M. H. Devoret, S. M. Girvin, R. J. Schoelkopf

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365 Scopus citations

Abstract

We present a detailed characterization of coherence in seven transmon qubits in a circuit QED architecture. We find that spontaneous emission rates are strongly influenced by far off-resonant modes of the cavity and can be understood within a semiclassical circuit model. A careful analysis of the spontaneous qubit decay into a microwave transmission-line cavity can accurately predict the qubit lifetimes over 2 orders of magnitude in time and more than an octave in frequency. Coherence times T1 and T2* of more than a microsecond are reproducibly demonstrated.

Original language	English (US)
Article number	080502
Journal	Physical review letters
Volume	101
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.101.080502
State	Published - Aug 21 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.101.080502

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title = "Controlling the spontaneous emission of a superconducting transmon qubit",

abstract = "We present a detailed characterization of coherence in seven transmon qubits in a circuit QED architecture. We find that spontaneous emission rates are strongly influenced by far off-resonant modes of the cavity and can be understood within a semiclassical circuit model. A careful analysis of the spontaneous qubit decay into a microwave transmission-line cavity can accurately predict the qubit lifetimes over 2 orders of magnitude in time and more than an octave in frequency. Coherence times T1 and T2* of more than a microsecond are reproducibly demonstrated.",

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AU - Houck, A. A.

AU - Schreier, J. A.

AU - Johnson, B. R.

AU - Chow, J. M.

AU - Koch, Jens

AU - Gambetta, J. M.

AU - Schuster, D. I.

AU - Frunzio, L.

AU - Devoret, M. H.

AU - Girvin, S. M.

AU - Schoelkopf, R. J.

PY - 2008/8/21

Y1 - 2008/8/21

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AB - We present a detailed characterization of coherence in seven transmon qubits in a circuit QED architecture. We find that spontaneous emission rates are strongly influenced by far off-resonant modes of the cavity and can be understood within a semiclassical circuit model. A careful analysis of the spontaneous qubit decay into a microwave transmission-line cavity can accurately predict the qubit lifetimes over 2 orders of magnitude in time and more than an octave in frequency. Coherence times T1 and T2* of more than a microsecond are reproducibly demonstrated.

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Controlling the spontaneous emission of a superconducting transmon qubit

Abstract

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