Measurement of a superconducting qubit with a microwave photon counter

被引：73

作者：

Opremcak, A. ^{[1
]}

Pechenezhskiy, I. V. ^{[1
,3
]}

Howington, C. ^{[2
]}

Christensen, B. G. ^{[1
]}

Beck, M. A. ^{[1
]}

Leonard, E., Jr. ^{[1
]}

Suttle, J. ^{[1
]}

Wilen, C. ^{[1
]}

Nesterov, K. N. ^{[1
]}

Ribeill, G. J. ^{[1
,4
]}

Thorbeck, T. ^{[1
,5
]}

Schlenker, F. ^{[1
]}

Vavilov, M. G. ^{[1
]}

Plourde, B. L. T. ^{[2
]}

McDermott, R. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[3] Univ Maryland, College Pk, MD 20742 USA

[4] Raytheon BBN Technol, Cambridge, MA 02138 USA

[5] IBM TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA

来源：

SCIENCE | 2018年 / 361卷 / 6408期

关键词：

QUANTUM CIRCUIT; STATES;

D O I：

10.1126/science.aat4625

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fast, high-fidelity measurement is a key ingredient for quantum error correction. Conventional approaches to the measurement of superconducting qubits, involving linear amplification of a microwave probe tone followed by heterodyne detection at room temperature, do not scale well to large system sizes. We introduce an approach to measurement based on a microwave photon counter demonstrating raw single-shot measurement fidelity of 92%. Moreover, the intrinsic damping of the photon counter is used to extract the energy released by the measurement process, allowing repeated high-fidelity quantum nondemolition measurements. Our scheme provides access to the classical outcome of projective quantum measurement at the millikelvin stage and could form the basis for a scalable quantum-to-classical interface.

引用

页码：1239 / +

页数：4

共 33 条

[1] Coherent Josephson Qubit Suitable for Scalable Quantum Integrated Circuits [J].

Barends, R. ;

Kelly, J. ;

Megrant, A. ;

Sank, D. ;

Jeffrey, E. ;

Chen, Y. ;

Yin, Y. ;

Chiaro, B. ;

Mutus, J. ;

Neill, C. ;

O'Malley, P. ;

Roushan, P. ;

Wenner, J. ;

White, T. C. ;

Cleland, A. N. ;

Martinis, John M. .

PHYSICAL REVIEW LETTERS, 2013, 111 (08)

[2] Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation [J].

Blais, A ;

Huang, RS ;

Wallraff, A ;

Girvin, SM ;

Schoelkopf, RJ .

PHYSICAL REVIEW A, 2004, 69 (06) :062320-1

[3] Microwave Photon Counter Based on Josephson Junctions [J].

Chen, Y. -F. ;

Hover, D. ;

Sendelbach, S. ;

Maurer, L. ;

Merkel, S. T. ;

Pritchett, E. J. ;

Wilhelm, F. K. ;

McDermott, R. .

PHYSICAL REVIEW LETTERS, 2011, 107 (21)

[4] Observation of quantum oscillations between a Josephson phase qubit and a microscopic resonator using fast readout [J].

Cooper, KB ;

Steffen, M ;

McDermott, R ;

Simmonds, RW ;

Oh, S ;

Hite, DA ;

Pappas, DP ;

Martinis, JM .

PHYSICAL REVIEW LETTERS, 2004, 93 (18) :180401-1

[5] Fluxon Readout of a Superconducting Qubit [J].

Fedorov, Kirill G. ;

Shcherbakova, Anastasia V. ;

Wolf, Michael J. ;

Beckmann, Detlef ;

Ustinov, Alexey V. .

PHYSICAL REVIEW LETTERS, 2014, 112 (16)

[6] Surface codes: Towards practical large-scale quantum computation [J].

Fowler, Austin G. ;

Mariantoni, Matteo ;

Martinis, John M. ;

Cleland, Andrew N. .

PHYSICAL REVIEW A, 2012, 86 (03)

[7] High-fidelity qubit measurement with a microwave-photon counter [J].

Govia, Luke C. G. ;

Pritchett, Emily J. ;

Xu, Canran ;

Plourde, B. L. T. ;

Vavilov, Maxim G. ;

Wilhelm, Frank K. ;

McDermott, R. .

PHYSICAL REVIEW A, 2014, 90 (06)

[8] Design of a ballistic fluxon qubit readout [J].

Herr, Anna ;

Fedorov, Arkady ;

Shnirman, Alexander ;

Il'ichev, Evgeny ;

Schon, Gerd .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2007, 20 (11) :S450-S454

[9] Generation of Fock states in a superconducting quantum circuit [J].

Hofheinz, Max ;

Weig, E. M. ;

Ansmann, M. ;

Bialczak, Radoslaw C. ;

Lucero, Erik ;

Neeley, M. ;

O'Connell, A. D. ;

Wang, H. ;

Martinis, John M. ;

Cleland, A. N. .

NATURE, 2008, 454 (7202) :310-314

[10] Tunable Superconducting Qubits with Flux-Independent Coherence [J].

Hutchings, M. D. ;

Hertzberg, J. B. ;

Liu, Y. ;

Bronn, N. T. ;

Keefe, G. A. ;

Brink, Markus ;

Chow, Jerry M. ;

Plourde, B. L. T. .

PHYSICAL REVIEW APPLIED, 2017, 8 (04)

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