75703 20200117221642.0 doi 10.1103/PhysRevA.97.053846 sideral 106859 ART-2018-106859 eng Quijandria, F. PT-symmetric circuit QED 2018 Access copy available to the general public Unrestricted 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. info:eu-repo/grantAgreement/ES/DGA/FENOL-GROUP info:eu-repo/grantAgreement/ES/MINECO/FIS2014-55867 info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53432-C5-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.907 2018 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 13 / 36 = 0.361 2018 Q2 T2 OPTICS 28 / 95 = 0.295 2018 Q2 T1 1.268 2018 Atomic and Molecular Physics, and Optics 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0001-7894-2426 Naether, U. Ozdemir, S.K. Nori, F. (orcid)0000-0003-4478-1948 Zueco, D. Universidad de Zaragoza 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 97, 5 (2018), 053846 [14 pp] Phys. rev., A Physical Review A 2469-9926 885014 http://zaguan.unizar.es/record/75703/files/texto_completo.pdf Versión publicada 27482 http://zaguan.unizar.es/record/75703/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:75703 articulos driver 2020-01-17-22:04:47 ARTICLE