PT-symmetric circuit QED

被引：89

作者：

Quijandria, Fernando ^{[1
]}

Naether, Uta ^{[2
,3
]}

Ozdemir, Sahin K. ^{[4
]}

Nori, Franco ^{[5
,6
]}

Zueco, David ^{[2
,3
,7
]}

机构：

[1] Chalmers Univ Technol, Microtechnol & Nanosci, MC2, SE-41296 Gothenburg, Sweden

[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50012 Zaragoza, Spain

[3] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50012 Zaragoza, Spain

[4] Penn State Univ, Dept Engn Sci & Mech, 227 Hammond Bldg, University Pk, PA 16802 USA

[5] RIKEN Cluster Pioneering Res, Theoret Quantum Phys Lab, Wako, Saitama 3510198, Japan

[6] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[7] Fdn ARAID, Paseo Maria Agustin 36, E-50004 Zaragoza, Spain

来源：

PHYSICAL REVIEW A | 2018年 / 97卷 / 05期

基金：

日本学术振兴会; 瑞典研究理事会;

关键词：

WHISPERING-GALLERY MICROCAVITIES; PARITY-TIME SYMMETRY; EXCEPTIONAL POINTS; SUPERCONDUCTING CIRCUITS; INDUCED TRANSPARENCY; PHOTONIC LATTICES; LASERS; SYSTEM;

D O I：

10.1103/PhysRevA.97.053846

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A parity-time (PT)-symmetric system emerging from a quantum dynamics is highly desirable in order to understand the possible implications of PT symmetry in the next generation of quantum technologies. In this work, we address this need by proposing and studying a circuit-QED architecture that consists of two coupled resonators and two qubits (each coupled to one resonator). By means of external driving fields on the qubits, we are able to tune gains and losses in the resonators. Starting with the quantum dynamics of this system, we show the emergence of the PT symmetry via the selection of both driving amplitudes and frequencies. We engineer the system such that a non-number-conserving dipole-dipole interaction emerges, introducing an instability at large coupling strengths. The PT symmetry and its breaking, as well as the predicted instability in this circuit-QED system, can be observed in a transmission experiment.

引用

页数：14

共 62 条

[1] Two-level systems driven by large-amplitude fields [J].

Ashhab, S. ;

Johansson, J. R. ;

Zagoskin, A. M. ;

Nori, Franco .

PHYSICAL REVIEW A, 2007, 75 (06)

[2] Parity-time-symmetric quantum critical phenomena [J].

Ashida, Yuto ;

Furukawa, Shunsuke ;

Ueda, Masahito .

NATURE COMMUNICATIONS, 2017, 8

[3] Jamming anomaly in PT-symmetric systems [J].

Barashenkov, I. V. ;

Zezyulin, D. A. ;

Konotop, V. V. .

NEW JOURNAL OF PHYSICS, 2016, 18

[4] Ultrastrong coupling in two-resonator circuit QED [J].

Baust, A. ;

Hoffmann, E. ;

Haeberlein, M. ;

Schwarz, M. J. ;

Eder, P. ;

Goetz, J. ;

Wulschner, F. ;

Xie, E. ;

Zhong, L. ;

Quijandria, F. ;

Zueco, D. ;

Garcia Ripoll, J. -J. ;

Garcia-Alvarez, L. ;

Romero, G. ;

Solano, E. ;

Fedorov, K. G. ;

Menzel, E. P. ;

Deppe, F. ;

Marx, A. ;

Gross, R. .

PHYSICAL REVIEW B, 2016, 93 (21)

[5] Tunable and switchable coupling between two superconducting resonators [J].

Baust, A. ;

Hoffmann, E. ;

Haeberlein, M. ;

Schwarz, M. J. ;

Eder, P. ;

Goetz, J. ;

Wulschner, F. ;

Xie, E. ;

Zhong, L. ;

Quijandria, F. ;

Peropadre, B. ;

Zueco, D. ;

Garcia Ripoll, J. -J. ;

Solano, E. ;

Fedorov, K. ;

Menzel, E. P. ;

Deppe, F. ;

Marx, A. ;

Gross, R. .

PHYSICAL REVIEW B, 2015, 91 (01)

[6] Observation of PT phase transition in a simple mechanical system [J].

Bender, Carl M. ;

Berntson, Bjorn K. ;

Parker, David ;

Samuel, E. .

AMERICAN JOURNAL OF PHYSICS, 2013, 81 (03) :173-179

[7] Introduction to PT-symmetric quantum theory [J].

Bender, CM .

CONTEMPORARY PHYSICS, 2005, 46 (04) :277-292

[8] Real spectra in non-Hermitian Hamiltonians having PT symmetry [J].

Bender, CM ;

Boettcher, S .

PHYSICAL REVIEW LETTERS, 1998, 80 (24) :5243-5246

[9] PT Symmetry and Spontaneous Symmetry Breaking in a Microwave Billiard [J].

Bittner, S. ;

Dietz, B. ;

Guenther, U. ;

Harney, H. L. ;

Miski-Oglu, M. ;

Richter, A. ;

Schaefer, F. .

PHYSICAL REVIEW LETTERS, 2012, 108 (02)

[10] Reversing the pump dependence of a laser at an exceptional point [J].

Brandstetter, M. ;

Liertzer, M. ;

Deutsch, C. ;

Klang, P. ;

Schoeberl, J. ;

Tuereci, H. E. ;

Strasser, G. ;

Unterrainer, K. ;

Rotter, S. .

NATURE COMMUNICATIONS, 2014, 5

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