Thermodynamic limit in the two-qubit quantum Rabi model with spin-spin coupling
The occurrence of a second-order superradiant quantum phase transition is brought to light in a quantum system consisting of two interacting qubits coupled to the same quantized field mode. We introduce an appropriate thermodynamic limit for the integrable two-qubit quantum Rabi model with spin-spin interaction. Namely, this limit is determined by the infinite ratios of the spin-spin and the spin-mode couplings to the mode frequency, regardless of the spin-to-mode frequency ratios. Published by the American Physical Society 2024
Authors
- Davide Valenti (ORCID: https://orcid.org/0000-0001-5496-1518)
- G. Falci (ORCID: https://orcid.org/0000-0001-5842-2677)
- E. Solano (ORCID: https://orcid.org/0000-0002-8602-1181)
- Alessandro Sergi (ORCID: https://orcid.org/0000-0003-3954-0445)
- Roberto Grimaudo (ORCID: https://orcid.org/0000-0003-2363-7699)
- A. Messina (ORCID: https://orcid.org/0000-0002-3367-0129)
- E. Paladino
Institutions
- University of Messina (IT)
- Durban University of Technology (ZA)
- University of Catania (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Catania (IT)
Publication Details
- Journal
- Physical Review Research
- Published
- 2024-12-20
- DOI
- https://doi.org/10.1103/physrevresearch.6.043298
- Citations
- 7
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 2.43
Funders
- QuantERA
- Ministero dell'Università e della Ricerca