Partly invariant steady state of two interacting open quantum systems

Bernád, József Zsolt; Torres, Juan Mauricio

doi:10.1103/physreva.92.062114

Cited by 7 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rectification can be achieved even for resonant qubits thus allowing to conduct large heat currents without compromising rectification efficiency. Since the anisotropic exchange model can be applied to natural weak ferromagnets [41,42], nuclear spin environments [40,43], cavity QED [44][45][46], circuit QED [48][49][50][51], trapped ions [47], optomechanical systems [48,52,55] we anticipate that our results can be significant for the heat management in such systems.…”

Section: Discussionmentioning

confidence: 91%

“…We have investigated a quantum thermal diode composed of two qubits coupled to each other via anisotropic exchange interaction originally introduced in Ref. [52]. By deriving the global master equation, analytical expressions for the heat currents in the system are found.…”

Section: Discussionmentioning

confidence: 99%

“…We specifically use the same interaction (σ z L σ x R ) proposed in Ref. [52]; where the model is motivated for its mathematical similarity to optomechanical coupling but no physical motivation or an implementation scheme is given. In order to produce such an interaction in a physical and controllable manner, we have suggested several systems in preceding sections.…”

Section: Physical Model Systems For Possible Implementationsmentioning

confidence: 99%

“…It can be engineered, as we shall discuss in Sec. IV, using related model Hamiltonians of various systems such as cavity QED [44][45][46], trapped ions [47], circuit QED [48][49][50][51], and optomechanics [52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quantum optical two-atom thermal diode

et al. 2019

View full text Add to dashboard Cite

We put forward a quantum-optical model for a thermal diode based on heat transfer between two thermal baths through a pair of interacting qubits. We find that if the qubits are coupled by a Raman field that induces an anisotropic interaction, heat flow can become non-reciprocal and undergoes rectification even if the baths have equal dissipation rates and/or the qubits are resonant. The heat flow rectification is explained by four-wave mixing and Raman transitions between dressed states of the interacting qubits and is governed by a global master equation. The anisotropic two-qubit interaction is the key for this present simple quantum thermal diode, whose resonant operation allows for high-efficiency rectification of large heat currents. Effects of spatial overlap of the baths are addressed. We also discuss the possible realizations of the model system in various platforms including optomechanical systems, systems of trapped ions, and circuit QED.

show abstract

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Physical Model Systems For Possible Implementationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantum optical two-atom thermal diode

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The optomechanical Hamiltonian has a special symmetry in which the number operator of the HF resonator mode is a constant of motion. The steady state of the HF resonator and the associated local observables for the HF mode are independent of the optomechanical coupling coefficient g [58]. The first three equations of motion form a closed set of dynamics for the q − p phase space trajectories, driven by n a .…”

Section: Discussionmentioning

confidence: 99%

Quantum heat engine with coupled superconducting resonators

et al. 2017

View full text Add to dashboard Cite

We propose a quantum heat engine composed of two superconducting transmission line resonators interacting with each other via an optomechanical-like coupling. One resonator is periodically excited by a thermal pump. The incoherently driven resonator induces coherent oscillations in the other one due to the coupling. A limit cycle, indicating finite power output, emerges in the thermodynamical phase space. The system implements an all-electrical analog of a photonic piston. Instead of mechanical motion, the power output is obtained as a coherent electrical charging in our case. We explore the differences between the quantum and classical descriptions of our system by solving the quantum master equation and classical Langevin equations. Specifically, we calculate the mean number of excitations, second-order coherence, as well as the entropy, temperature, power and mean energy to reveal the signatures of quantum behavior in the statistical and thermodynamic properties of the system. We find evidence of a quantum enhancement in the power output of the engine at low temperatures.

show abstract

Dissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms

Chong

Shao

2021

Quantum Engineering

View full text Add to dashboard Cite

The multipartite Greenberger–Horne–Zeilinger (GHZ) states are indispensable elements for various quantum information processing tasks. Here we put forward two deterministic proposals to dissipatively prepare tripartite GHZ states in a neutral atom system. The first scheme utilizes the polychromatic driving fields and the engineered spontaneous emission of Rydberg states to generate a tripartite GHZ state with a high efficiency, which is then optimized by introducing the Gaussian soft control pulse. In the second scenario, we exploit the natural spontaneous emission of the Rydberg states as a resource, thence a steady tripartite GHZ state with fidelity around 98% can be obtained by simultaneously integrating the switching driving of unconventional Rydberg pumping and the Rydberg antiblockade effect.

show abstract

Partly invariant steady state of two interacting open quantum systems

Cited by 7 publications

References 38 publications

Quantum optical two-atom thermal diode

Quantum optical two-atom thermal diode

Quantum heat engine with coupled superconducting resonators

Dissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms

Contact Info

Product

Resources

About