Circuit quantum electrodynamics: bistability and squeezed states

• Grant number: 13/23512-7
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): June 01, 2014
• Effective date (End): May 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Celso Jorge Villas-Bôas
• Grantee: Daniel Zini Rossatto
• Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated scholarship(s): 14/24576-1 - Ultrastrong and deep strong coupling regimes in circuit quantum electrodynamics, BE.EP.PD

Abstract

The emerging fields of quantum computation and quantum information science has required efforts on the development of new concepts and tools for the controlled application of quantum phenomena, in particular at the most fundamental level of single particles. Cavity quantum electrodynamics is a very useful technique to study the transmission and processing of information in open quantum systems through the interaction of individual particles of matter and light. Currently, one of the most successful hybrid systems is the combination of a microwave resonator with superconducting qubits, where such a combination is often called circuit quantum electrodynamics. This combination has been investigated mainly due to its scalability potential and its power to obtain strong and ultrastrong coupling regimes. The goal of this project is on exploring theoretically circuit quantum electrodynamics together with the study of the phenomenon of optical bistability and the generation of squeezed states, in order to provide a deeper understanding of the basis of quantum mechanics to adequately understand and improve the functionality of quantum devices based on these phenomena. In this project, by a research internship abroad, we will also study the generation of stable Schrödinger's cat states in circuit quantum electrodynamics considering the ultrastrong and deep strong coupling regimes.

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VILLAS-BOAS, CELSO J.; ROSSATTO, DANIEL Z. Multiphoton Jaynes-Cummings Model: Arbitrary Rotations in Fock Space and Quantum Filters. Physical Review Letters, v. 122, n. 12 MAR 28 2019. Web of Science Citations: 1.

DINIZ, E. C.; ROSSATTO, D. Z.; VILLAS-BOAS, C. J. Two-mode squeezing operator in circuit QED. QUANTUM INFORMATION PROCESSING, v. 17, n. 8 AUG 2018. Web of Science Citations: 0.

FELICETTI, S.; ROSSATTO, D. Z.; RICO, E.; SOLANO, E.; FORN-DIAZ, P. Two-photon quantum Rabi model with superconducting circuits. Physical Review A, v. 97, n. 1 JAN 30 2018. Web of Science Citations: 19.

BORGES, HALYNE S.; ROSSATTO, DANIEL Z.; LUIZ, FABRICIO S.; VILLAS-BOAS, CELSO J. Heralded entangling quantum gate via cavity-assisted photon scattering. Physical Review A, v. 97, n. 1 JAN 18 2018. Web of Science Citations: 3.

ROSSATTO, DANIEL Z.; VILLAS-BOAS, CELSO J.; SANZ, MIKEL; SOLANO, ENRIQUE. Spectral classification of coupling regimes in the quantum Rabi model. Physical Review A, v. 96, n. 1 JUL 24 2017. Web of Science Citations: 26.

ROSSATTO, D. Z.; VILLAS-BOAS, C. J. Relaxation time for monitoring the quantumness of an intense cavity field. Physical Review A, v. 94, n. 3 SEP 12 2016. Web of Science Citations: 0.