Collective effects enhanced multi-qubit information engines
arXiv:2306.12072 · doi:10.1103/PhysRevA.108.042219
Abstract
We study a quantum information engine (QIE) modeled by a multi-qubit working medium (WM) collectively coupled to a single thermal bath. We show that one can harness the collective effects to significantly enhance the performance of the QIE, as compared to equivalent engines lacking collective effects. We use one bit of information about the WM magnetization to extract work from the thermal bath. We analyze the work output, noise-to-signal ratio and thermodynamic uncertainty relation, and contrast these performance metrics of a collective QIE with that of an engine whose WM qubits are coupled independently to a thermal bath. We show that in the limit of high temperatures of the thermal bath, a collective QIE always outperforms its independent counterpart. In contrast to quantum heat engines, where collective enhancement in specific heat plays a direct role in improving the performance of the engines, here the collective advantage stems from higher occupation probabilities for the higher energy levels of the positive magnetization states, as compared to the independent case.
9 pages, 7 figures
References in corpus (18)
- Thermodynamic uncertainty relation for biomolecular processes
- The thermodynamic meaning of negative entropy
- Superabsorption in an organic microcavity: towards a quantum battery
- Quantum Szilard Engine
- Quantum thermodynamic devices: from theoretical proposals to experimental reality
- A two-qubit engine fueled by entangling operations and local measurements
- Multipulse Double-Quantum Magnetometry With Near-Surface Nitrogen Vacancy Centers
- Violating the Thermodynamic Uncertainty Relation in the Three-Level Maser
- Many-body quantum thermal machines
- Thermodynamic uncertainty relations for coherently driven open quantum systems
- Collective effects on the performance and stability of quantum heat engines
- Efficiently Fuelling a Quantum Engine with Incompatible Measurements
- Harnessing non-adiabatic excitations promoted by a quantum critical point
- Quadratic Enhancement in the Reliability of Collective Quantum Engines
- Performance boost of a collective qutrit refrigerator
- Multilevel quantum thermodynamic swap engines
- Thermodynamics of Quantum Measurement and the Demon's Arrow of Time
- Precision bound and optimal control in periodically modulated continuous quantum thermal machines