Fast Accurate State Measurement with Superconducting Qubits

被引：319

作者：

Jeffrey, Evan ^{[1
]}

Sank, Daniel ^{[1
]}

Mutus, J. Y. ^{[1
]}

White, T. C. ^{[1
]}

Kelly, J. ^{[1
]}

Barends, R. ^{[1
]}

Chen, Y. ^{[1
]}

Chen, Z. ^{[1
]}

Chiaro, B. ^{[1
]}

Dunsworth, A. ^{[1
]}

Megrant, A. ^{[1
]}

O'Malley, P. J. J. ^{[1
]}

Neill, C. ^{[1
]}

Roushan, P. ^{[1
]}

Vainsencher, A. ^{[1
]}

Wenner, J. ^{[1
]}

Cleland, A. N. ^{[1
]}

Martinis, John M. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 19期

关键词：

JOSEPHSON-JUNCTION; QUANTUM;

D O I：

10.1103/PhysRevLett.112.190504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Faster and more accurate state measurement is required for progress in superconducting qubit experiments with greater numbers of qubits and advanced techniques such as feedback. We have designed a multiplexed measurement system with a bandpass filter that allows fast measurement without increasing environmental damping of the qubits. We use this to demonstrate simultaneous measurement of four qubits on a single superconducting integrated circuit, the fastest of which can be measured to 99.8% accuracy in 140 ns. This accuracy and speed is suitable for advanced multiqubit experiments including surface-code error correction.

引用

页数：5

共 26 条

[1] Superconducting quantum circuits at the surface code threshold for fault tolerance [J].

Barends, R. ;

Kelly, J. ;

Megrant, A. ;

Veitia, A. ;

Sank, D. ;

Jeffrey, E. ;

White, T. C. ;

Mutus, J. ;

Fowler, A. G. ;

Campbell, B. ;

Chen, Y. ;

Chen, Z. ;

Chiaro, B. ;

Dunsworth, A. ;

Neill, C. ;

O'Malley, P. ;

Roushan, P. ;

Vainsencher, A. ;

Wenner, J. ;

Korotkov, A. N. ;

Cleland, A. N. ;

Martinis, John M. .

NATURE, 2014, 508 (7497) :500-503

[2] 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)

[3] 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

[4] QUANTUM LIMITS ON NOISE IN LINEAR-AMPLIFIERS [J].

CAVES, CM .

PHYSICAL REVIEW D, 1982, 26 (08) :1817-1839

[5] Multiplexed dispersive readout of superconducting phase qubits [J].

Chen, Yu ;

Sank, D. ;

O'Malley, P. ;

White, T. ;

Barends, R. ;

Chiaro, B. ;

Kelly, J. ;

Lucero, E. ;

Mariantoni, M. ;

Megrant, A. ;

Neill, C. ;

Vainsencher, A. ;

Wenner, J. ;

Yin, Y. ;

Cleland, A. N. ;

Martinis, John M. .

APPLIED PHYSICS LETTERS, 2012, 101 (18)

[6] Fabrication and characterization of aluminum airbridges for superconducting microwave circuits [J].

Chen, Zijun ;

Megrant, A. ;

Kelly, J. ;

Barends, R. ;

Bochmann, J. ;

Chen, Yu ;

Chiaro, B. ;

Dunsworth, A. ;

Jeffrey, E. ;

Mutus, J. Y. ;

O'Malley, P. J. J. ;

Neill, C. ;

Roushan, P. ;

Sank, D. ;

Vainsencher, A. ;

Wenner, J. ;

White, T. C. ;

Cleland, A. N. ;

Martinis, John M. .

APPLIED PHYSICS LETTERS, 2014, 104 (05)

[7] Detecting highly entangled states with a joint qubit readout [J].

Chow, J. M. ;

DiCarlo, L. ;

Gambetta, J. M. ;

Nunnenkamp, A. ;

Bishop, Lev S. ;

Frunzio, L. ;

Devoret, M. H. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW A, 2010, 81 (06)

[8]

Chow J. M., ARXIV13116330

[9] EFFECT OF AN ARBITRARY DISSIPATIVE CIRCUIT ON THE QUANTUM ENERGY-LEVELS AND TUNNELING OF A JOSEPHSON JUNCTION [J].

ESTEVE, D ;

DEVORET, MH ;

MARTINIS, JM .

PHYSICAL REVIEW B, 1986, 34 (01) :158-163

[10] 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)

← 1 2 3 →