Designing Robust Quantum Refrigerators in Disordered Spin Models
- URL: http://arxiv.org/abs/2107.11668v3
- Date: Thu, 3 Mar 2022 11:25:13 GMT
- Title: Designing Robust Quantum Refrigerators in Disordered Spin Models
- Authors: Tanoy Kanti Konar, Srijon Ghosh, Amit Kumar Pal, Aditi Sen De
- Abstract summary: We explore a small quantum refrigerator in which the working substance is made of paradigmatic nearest-neighbor quantum spin models.
We identify a specific range of interaction strengths which can be tuned appropriately to ensure a cooling of the selected spin.
In this domain, when one of the interaction strengths is disordered, the performance of the thermal machine operating as a refrigerator remains almost unchanged.
- Score: 0.0
- License: http://creativecommons.org/publicdomain/zero/1.0/
- Abstract: We explore a small quantum refrigerator in which the working substance is
made of paradigmatic nearest-neighbor quantum spin models, the XYZ and the XY
model with Dzyaloshinskii-Moriya interactions, consisting of two and three
spins, each of which is in contact with a bosonic bath. We identify a specific
range of interaction strengths which can be tuned appropriately to ensure a
cooling of the selected spin in terms of its local temperature in the
weak-coupling limit. Moreover, we report that in this domain, when one of the
interaction strengths is disordered, the performance of the thermal machine
operating as a refrigerator remains almost unchanged instead of degradation,
thereby establishing the flexibility of this device. However, to obtain a
significant amount of cooling via ordered as well as disordered spin models, we
observe that one has to go beyond the weak-coupling limit and compute the
figures of merits by using global master equations.
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