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Single-shot measurement of the Josephson charge qubit

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Single-shot measurement of the Josephson charge qubit. / Astafiev, Oleg V.; Pashkin, Yuri; Yamamoto, T. et al.
In: Physical review B, Vol. 69, No. 18, 180507, 01.05.2004.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Astafiev, OV, Pashkin, Y, Yamamoto, T, Nakamura, Y & Tsai, J-S 2004, 'Single-shot measurement of the Josephson charge qubit', Physical review B, vol. 69, no. 18, 180507. https://doi.org/10.1103/PhysRevB.69.180507

APA

Astafiev, O. V., Pashkin, Y., Yamamoto, T., Nakamura, Y., & Tsai, J.-S. (2004). Single-shot measurement of the Josephson charge qubit. Physical review B, 69(18), Article 180507. https://doi.org/10.1103/PhysRevB.69.180507

Vancouver

Astafiev OV, Pashkin Y, Yamamoto T, Nakamura Y, Tsai JS. Single-shot measurement of the Josephson charge qubit. Physical review B. 2004 May 1;69(18):180507. doi: 10.1103/PhysRevB.69.180507

Author

Astafiev, Oleg V. ; Pashkin, Yuri ; Yamamoto, T. et al. / Single-shot measurement of the Josephson charge qubit. In: Physical review B. 2004 ; Vol. 69, No. 18.

Bibtex

@article{7ce2632bafc84c548362ca05fe62a184,
title = "Single-shot measurement of the Josephson charge qubit",
abstract = "We demonstrate single-shot readout of quantum states of the Josephson charge qubit. The quantum bits are transformed into and stored as classical bits ~charge quanta! in a dynamic memory cell—a superconducting island. The transformation of state u1& ~differing form state u0& by an extra Cooper pair! is a result of a controllable quasiparticle tunneling to the island. The charge is then detected by a conventional single-electron transistor, electrostatically decoupled from the qubit. We study relaxation dynamics in the system and obtain the readout efficiency of 87% and 93% for u1& and u0& states, respectively.",
author = "Astafiev, {Oleg V.} and Yuri Pashkin and T. Yamamoto and Y. Nakamura and Jaw-Shen Tsai",
year = "2004",
month = may,
day = "1",
doi = "10.1103/PhysRevB.69.180507",
language = "English",
volume = "69",
journal = "Physical review B",
issn = "0163-1829",
publisher = "AMER PHYSICAL SOC",
number = "18",

}

RIS

TY - JOUR

T1 - Single-shot measurement of the Josephson charge qubit

AU - Astafiev, Oleg V.

AU - Pashkin, Yuri

AU - Yamamoto, T.

AU - Nakamura, Y.

AU - Tsai, Jaw-Shen

PY - 2004/5/1

Y1 - 2004/5/1

N2 - We demonstrate single-shot readout of quantum states of the Josephson charge qubit. The quantum bits are transformed into and stored as classical bits ~charge quanta! in a dynamic memory cell—a superconducting island. The transformation of state u1& ~differing form state u0& by an extra Cooper pair! is a result of a controllable quasiparticle tunneling to the island. The charge is then detected by a conventional single-electron transistor, electrostatically decoupled from the qubit. We study relaxation dynamics in the system and obtain the readout efficiency of 87% and 93% for u1& and u0& states, respectively.

AB - We demonstrate single-shot readout of quantum states of the Josephson charge qubit. The quantum bits are transformed into and stored as classical bits ~charge quanta! in a dynamic memory cell—a superconducting island. The transformation of state u1& ~differing form state u0& by an extra Cooper pair! is a result of a controllable quasiparticle tunneling to the island. The charge is then detected by a conventional single-electron transistor, electrostatically decoupled from the qubit. We study relaxation dynamics in the system and obtain the readout efficiency of 87% and 93% for u1& and u0& states, respectively.

U2 - 10.1103/PhysRevB.69.180507

DO - 10.1103/PhysRevB.69.180507

M3 - Journal article

VL - 69

JO - Physical review B

JF - Physical review B

SN - 0163-1829

IS - 18

M1 - 180507

ER -