Geometric Phase of a Transmon in a Dissipative Quantum Circuit.
Entropy (Basel)
; 26(1)2024 Jan 22.
Article
in En
| MEDLINE
| ID: mdl-38275497
ABSTRACT
Superconducting circuits reveal themselves as promising physical devices with multiple uses. Within those uses, the fundamental concept of the geometric phase accumulated by the state of a system shows up recurrently, as, for example, in the construction of geometric gates. Given this framework, we study the geometric phases acquired by a paradigmatic setup a transmon coupled to a superconductor resonating cavity. We do so both for the case in which the evolution is unitary and when it is subjected to dissipative effects. These models offer a comprehensive quantum description of an anharmonic system interacting with a single mode of the electromagnetic field within a perfect or dissipative cavity, respectively. In the dissipative model, the non-unitary effects arise from dephasing, relaxation, and decay of the transmon coupled to its environment. Our approach enables a comparison of the geometric phases obtained in these models, leading to a thorough understanding of the corrections introduced by the presence of the environment.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Entropy (Basel)
Year:
2024
Document type:
Article
Affiliation country:
Italy
Country of publication:
Switzerland