Collective effects enhanced multi-qubit information engines
- URL: http://arxiv.org/abs/2306.12072v2
- Date: Sat, 18 Nov 2023 08:45:56 GMT
- Title: Collective effects enhanced multi-qubit information engines
- Authors: Noufal Jaseem and Victor Mukherjee
- Abstract summary: 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.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- 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.
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