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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Two-mode squeezing operator in circuit QED

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Autor(es):
Diniz, E. C. [1] ; Rossatto, D. Z. [1] ; Villas-Boas, C. J. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: QUANTUM INFORMATION PROCESSING; v. 17, n. 8 AUG 2018.
Citações Web of Science: 0
Resumo

We theoretically investigate the implementation of the two-mode squeezing operator in circuit quantum electrodynamics. Inspired by a previous scheme for optical cavities (Prado et al. in Phys Rev A 73:043803, 2006), we employ a superconducting qubit coupled to two nondegenerate quantum modes and use a driving field on the qubit to adequately control the resonator-qubit interaction. Based on the generation of two-mode squeezed vacuum states, firstly we analyze the validity of our model in the ideal situation and then we investigate the influence of the dissipation mechanisms on the generation of the two-mode squeezing operation, namely the qubit and resonator mode decays and qubit dephasing. We show that our scheme allows the generation of highly squeezed states even with the state-of-the-art parameters, leading to a theoretical prediction of more than 10 dB of two-mode squeezing. Furthermore, our protocol is able to squeeze an arbitrary initial state of the resonators, which makes our scheme attractive for future applications in continuous-variable quantum information processing and quantum metrology in the realm of circuit quantum electrodynamics. (AU)

Processo FAPESP: 13/04162-5 - Desenvolvimento de sensores quânticos com átomos ultrafrios
Beneficiário:Philippe Wilhelm Courteille
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 13/23512-7 - Eletrodinâmica quântica de circuitos: biestabilidade e estados comprimidos
Beneficiário:Daniel Zini Rossatto
Linha de fomento: Bolsas no Brasil - Pós-Doutorado