Embedded Quantum Correlations in thermalized quantum Rabi systems
arXiv:2302.07068 · doi:10.1103/PhysRevA.108.012433
Abstract
We study the quantum correlations embedded in open quantum Rabi systems. Specifically, we study how the quantum correlation depends on the coupling strength, number of qubits, and reservoir temperatures. We numerically calculate the quantum correlations of up to three qubits interacting with a single field mode. We find that the embedded quantum correlations exhibit a maximum for a given coupling strength, which depends inversely on the number of subsystems and the reservoir temperature. We explore how this feature affects the performance of a many-qubit Otto heat engine, finding numerical evidence of a direct correspondence between the minimum of the extractable work and the maximum of the embedded quantum correlations in the qubit-cavity bi-partition. Furthermore, as we increase the number of qubits, the maximum extractable work is reached at smaller values of the coupling strength. This work could help design more sophisticated quantum heat engines that rely on many-body systems with embedded correlations as working substances.
12 pages and 12 figures
References in corpus (13)
- Circuit Quantum Electrodynamics
- Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
- Quantum Thermodynamic Cycles and quantum heat engines
- Single ion heat engine with maximum efficiency at maximum power
- The quantum Rabi model: solution and dynamics
- Observation of a quantum phase transition in the quantum Rabi model with a single trapped ion
- Quantum discord and geometry for a class of two-qubit states
- Dissipative Phase Transition in the Open Quantum Rabi Model
- Evaluation of convex roof entanglement measures
- Quantum correlated heat engine with nonlinear spin-spin interactions
- Role of quantum correlations in light-matter quantum heat engines
- One-photon Solutions to Multiqubit Multimode quantum Rabi model
- Multi-qubit Quantum Rabi Model and Multi-partite Entangled States in a Circuit QED System