Purification and switching protocols for dissipatively stabilized entangled qubit states

被引：12

作者：

Hein, Sven M. ^{[1
,2
]}

Aron, Camille ^{[2
,3
,4
]}

Tureci, Hakan E. ^{[2
]}

机构：

[1] Tech Univ Berlin, Inst Theoret Phys Nichtlineare Opt & Quantenelekt, Hardenbergstr 36, D-10623 Berlin, Germany

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[3] Ecole Normale Super, CNRS, Lab Phys Theor, Paris, France

[4] Katholieke Univ Leuven, Inst Theoret Fys, Louvain, Belgium

来源：

PHYSICAL REVIEW A | 2016年 / 93卷 / 06期

基金：

美国国家科学基金会;

关键词：

QUANTUM-SYSTEMS; SUPERCONDUCTING QUBITS; ARTIFICIAL ATOMS; FEEDBACK; DECOHERENCE; CAVITY; MEMORY; SPIN; BITS;

D O I：

10.1103/PhysRevA.93.062331

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Pure dephasing processes limit the fidelities achievable in driven-dissipative schemes for stabilization of entangled states of qubits. We propose a scheme which, combined with already existing entangling methods, purifies the desired entangled state by driving out of equilibrium auxiliary dissipative cavity modes coupled to the qubits. We lay out the specifics of our scheme and compute its efficiency in the particular context of two superconducting qubits in a cavity-QED architecture, where the strongly coupled auxiliary modes provided by collective cavity excitations can drive and sustain the qubits in maximally entangled Bell states with fidelities reaching 90% for experimentally accessible parameters.

引用

页数：11

共 77 条

[1] Microcavity controlled coupling of excitonic qubits [J].

Albert, F. ;

Sivalertporn, K. ;

Kasprzak, J. ;

Strauss, M. ;

Schneider, C. ;

Hofling, S. ;

Kamp, M. ;

Forchel, A. ;

Reitzenstein, S. ;

Muljarov, E. A. ;

Langbein, W. .

NATURE COMMUNICATIONS, 2013, 4

[2]

[Anonymous], ARXIV150106611

[3] Photon-Mediated Interactions: A Scalable Tool to Create and Sustain Entangled States of N Atoms [J].

Aron, Camille ;

Kulkarni, Manas ;

Tuereci, Hakan E. .

PHYSICAL REVIEW X, 2016, 6 (01)

[4] Steady-state entanglement of spatially separated qubits via quantum bath engineering [J].

Aron, Camille ;

Kulkarni, Manas ;

Tuereci, Hakan E. .

PHYSICAL REVIEW A, 2014, 90 (06)

[5] Realization of the Dicke Model Using Cavity-Assisted Raman Transitions [J].

Baden, Markus P. ;

Arnold, Kyle J. ;

Grimsmo, Arne L. ;

Parkins, Scott ;

Barrett, Murray D. .

PHYSICAL REVIEW LETTERS, 2014, 113 (02)

[6] 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

[7] Quantum computing using dissipation to remain in a decoherence-free subspace [J].

Beige, A ;

Braun, D ;

Tregenna, B ;

Knight, PL .

PHYSICAL REVIEW LETTERS, 2000, 85 (08) :1762-1765

[8] Long-Time Preservation of Nonlocal Entanglement [J].

Bellomo, Bruno ;

Lo Franco, Rosario ;

Compagno, Giuseppe .

ADVANCED SCIENCE LETTERS, 2009, 2 (04) :459-462

[9] Entanglement trapping in structured environments [J].

Bellomo, Bruno ;

Lo Franco, Rosario ;

Maniscalco, Sabrina ;

Compagno, Giuseppe .

PHYSICAL REVIEW A, 2008, 78 (06)

[10] Optimized dynamical decoupling in a model quantum memory [J].

Biercuk, Michael J. ;

Uys, Hermann ;

VanDevender, Aaron P. ;

Shiga, Nobuyasu ;

Itano, Wayne M. ;

Bollinger, John J. .

NATURE, 2009, 458 (7241) :996-1000

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