Protected Quantum Computation with Multiple Resonators in Ultrastrong Coupling Circuit QED

被引：102

作者：

Nataf, Pierre ^{[1
]}

Ciuti, Cristiano

机构：

[1] Univ Paris 07, Lab Mat & Phenomenes Quant, F-75205 Paris 13, France

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 19期

关键词：

DECOHERENCE; QUBITS;

D O I：

10.1103/PhysRevLett.107.190402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate theoretically the dynamical behavior of a qubit obtained with the two ground eigenstates of an ultrastrong coupling circuit-QED system consisting of a finite number of Josephson fluxonium atoms inductively coupled to a transmission line resonator. We show a universal set of quantum gates by using multiple transmission line resonators (each resonator represents a single qubit). We discuss the intrinsic "anisotropic" nature of noise sources for fluxonium artificial atoms. Through a master equation treatment with colored noise and many-level dynamics, we prove that, for a general class of anisotropic noise sources, the coherence time of the qubit and the fidelity of the quantum operations can be dramatically improved in an optimal regime of ultrastrong coupling, where the ground state is an entangled photonic "cat" state.

引用

页数：5

共 42 条

[1] Signatures of the ultrastrong light-matter coupling regime [J].

Anappara, Aji A. ;

De Liberato, Simone ;

Tredicucci, Alessandro ;

Ciuti, Cristiano ;

Biasiol, Giorgio ;

Sorba, Lucia ;

Beltram, Fabio .

PHYSICAL REVIEW B, 2009, 79 (20)

[2] Qubit-oscillator systems in the ultrastrong-coupling regime and their potential for preparing nonclassical states [J].

Ashhab, S. ;

Nori, Franco .

PHYSICAL REVIEW A, 2010, 81 (04)

[3] ELEMENTARY GATES FOR QUANTUM COMPUTATION [J].

BARENCO, A ;

BENNETT, CH ;

CLEVE, R ;

DIVINCENZO, DP ;

MARGOLUS, N ;

SHOR, P ;

SLEATOR, T ;

SMOLIN, JA ;

WEINFURTER, H .

PHYSICAL REVIEW A, 1995, 52 (05) :3457-3467

[4] Fast Tunable Coupler for Superconducting Qubits [J].

Bialczak, R. C. ;

Ansmann, M. ;

Hofheinz, M. ;

Lenander, M. ;

Lucero, E. ;

Neeley, M. ;

O'Connell, A. D. ;

Sank, D. ;

Wang, H. ;

Weides, M. ;

Wenner, J. ;

Yamamoto, T. ;

Cleland, A. N. ;

Martinis, J. M. .

PHYSICAL REVIEW LETTERS, 2011, 106 (06)

[5] 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

[6] Ultrastrong coupling regime of cavity QED with phase-biased flux qubits [J].

Bourassa, J. ;

Gambetta, J. M. ;

Abdumalikov, A. A., Jr. ;

Astafiev, O. ;

Nakamura, Y. ;

Blais, A. .

PHYSICAL REVIEW A, 2009, 80 (03)

[7]

Breuer H.P., 2006, The Theory of Open Quantum Systems

[8] Efficient one- and two-qubit pulsed gates for an oscillator-stabilized Josephson qubit [J].

Brito, Frederico ;

DiVincenzo, David P. ;

Koch, Roger H. ;

Steffen, Matthias .

NEW JOURNAL OF PHYSICS, 2008, 10

[9] Observing the progressive decoherence of the ''meter'' in a quantum measurement [J].

Brune, M ;

Hagley, E ;

Dreyer, J ;

Maitre, X ;

Maali, A ;

Wunderlich, C ;

Raimond, JM ;

Haroche, S .

PHYSICAL REVIEW LETTERS, 1996, 77 (24) :4887-4890

[10] Deep Strong Coupling Regime of the Jaynes-Cummings Model [J].

Casanova, J. ;

Romero, G. ;

Lizuain, I. ;

Garcia-Ripoll, J. J. ;

Solano, E. .

PHYSICAL REVIEW LETTERS, 2010, 105 (26)

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