Vaidya, GM and Jäger, SB and Shankar, A (2025) Quantum synchronization and dissipative quantum sensing. In: Physical Review A, 111 (1).
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Abstract
We study the phenomenon of quantum synchronization from the viewpoint of quantum metrology. By interpreting quantum self-sustained oscillators as dissipative quantum sensors, we develop a framework to characterize several aspects of quantum synchronization. We show that the quantum Fisher information (QFI) serves as a system-agnostic measure of quantum synchronization that also carries a clear operational meaning, viz., it quantifies the precision with which the amplitude of a weak synchronizing drive can be measured. We extend our analysis to study many-body oscillators subjected to multiple drives. We show how the QFI matrix can be used to determine the optimal drive that maximizes quantum synchronization, and also to quantitatively differentiate the synchronization responses induced by different drives. Our work highlights multiple connections between quantum synchronization and quantum metrology, paving a route toward finding quantum technological applications of quantum synchronization. © 2025 American Physical Society.
| Item Type: | Journal Article |
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| Publication: | Physical Review A |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to the authors. |
| Keywords: | Oscillators (mechanical); Quantum electronics; Quantum optics; Synchronization, Fisher information; Fisher information matrices; Many body; Multiple connections; Optimal drives; Quantum metrology; Quantum sensors; Self-sustained oscillators; Technological applications, Fisher information matrix |
| Department/Centre: | Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics |
| Date Deposited: | 25 Jan 2025 16:23 |
| Last Modified: | 25 Jan 2025 16:23 |
| URI: | http://eprints.iisc.ac.in/id/eprint/87363 |
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