Readout of superconducting flux qubit state with a Cooper pair box

被引：0

作者：

Kim, Mun Dae ^{[1
,2
]}

Moon, K. ^{[1
]}

机构：

[1] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea

[2] Korea Inst Adv Study, Seoul 130722, South Korea

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

CHARGE QUBITS; QUANTUM-STATE;

D O I：

10.1088/0953-8984/24/22/225305

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study a readout scheme of a superconducting flux qubit state with a Cooper pair box as a transmon. The qubit states consist of the superpositions of two degenerate states where the charge and phase degrees of freedom are entangled. Owing to the robustness of the transmon against external fluctuations, our readout scheme enables the quantum non-demolition and single-shot measurement of flux qubit states. The qubit state readout can be performed by using the nonlinear Josephson amplifiers after a pi/2 rotation driven by an ac electric field.

引用

页数：8

共 32 条

[1] Vacuum Rabi splitting due to strong coupling of a flux qubit and a coplanar-waveguide resonator [J].

Abdumalikov, Abdufarrukh A., Jr. ;

Astafiev, Oleg ;

Nakamura, Yasunobu ;

Pashkin, Yuri A. ;

Tsai, JawShen .

PHYSICAL REVIEW B, 2008, 78 (18)

[2] Dephasing of a superconducting qubit induced by photon noise [J].

Bertet, P ;

Chiorescu, I ;

Burkard, G ;

Semba, K ;

Harmans, CJPM ;

DiVincenzo, DP ;

Mooij, JE .

PHYSICAL REVIEW LETTERS, 2005, 95 (25)

[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-information processing with circuit quantum electrodynamics [J].

Blais, Alexandre ;

Gambetta, Jay ;

Wallraff, A. ;

Schuster, D. I. ;

Girvin, S. M. ;

Devoret, M. H. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW A, 2007, 75 (03)

[5] Quantum nondemolition readout using a Josephson bifurcation amplifier [J].

Boulant, N. ;

Ithier, G. ;

Meeson, P. ;

Nguyen, F. ;

Vion, D. ;

Esteve, D. ;

Siddiqi, I. ;

Vijay, R. ;

Rigetti, C. ;

Pierre, F. .

PHYSICAL REVIEW B, 2007, 76 (01)

[6] Solid-state qubits with current-controlled coupling [J].

Hime, T. ;

Reichardt, P. A. ;

Plourde, B. L. T. ;

Robertson, T. L. ;

Wu, C. -E. ;

Ustinov, A. V. ;

Clarke, John .

SCIENCE, 2006, 314 (5804) :1427-1429

[7] Controlling the spontaneous emission of a superconducting transmon qubit [J].

Houck, A. A. ;

Schreier, J. A. ;

Johnson, B. R. ;

Chow, J. M. ;

Koch, Jens ;

Gambetta, J. M. ;

Schuster, D. I. ;

Frunzio, L. ;

Devoret, M. H. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW LETTERS, 2008, 101 (08)

[8] Continuous monitoring of Rabi oscillations in a Josephson flux qubit [J].

Il'ichev, E ;

Oukhanski, N ;

Izmalkov, A ;

Wagner, T ;

Grajcar, M ;

Meyer, HG ;

Smirnov, AY ;

van den Brink, AM ;

Amin, MHS ;

Zagoskin, AM .

PHYSICAL REVIEW LETTERS, 2003, 91 (09)

[9] COMPARISON OF QUANTUM AND SEMICLASSICAL RADIATION THEORIES WITH APPLICATION TO BEAM MASER [J].

JAYNES, ET ;

CUMMINGS, FW .

PROCEEDINGS OF THE IEEE, 1963, 51 (01) :89-+

[10] Charge-insensitive qubit design derived from the Cooper pair box [J].

Koch, Jens ;

Yu, Terri M. ;

Gambetta, Jay ;

Houck, A. A. ;

Schuster, D. I. ;

Majer, J. ;

Blais, Alexandre ;

Devoret, M. H. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW A, 2007, 76 (04)

← 1 2 3 4 →