Modular Many-Body Quantum Sensors
- URL: http://arxiv.org/abs/2311.18319v1
- Date: Thu, 30 Nov 2023 07:42:29 GMT
- Title: Modular Many-Body Quantum Sensors
- Authors: Chiranjib Mukhopadhyay, Abolfazl Bayat
- Abstract summary: We develop a modular approach for introducing multiple phase transitions in a many-body system.
This naturally allows us to enlarge the region of quantum-enhanced precision by encompassing the newly created phase boundaries.
In symmetry-breaking sensors, we show that the newly created critical points inherit the original class.
In topological sensors, our modular construction creates multiple bands which leads to a rich phase diagram.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum many-body systems undergoing phase transitions have been proposed as
probes enabling beyond-classical enhancement of sensing precision. However,
this enhancement is usually limited to a very narrow region around the critical
point. Here, we systematically develop a modular approach for introducing
multiple phase transitions in a many-body system. This naturally allows us to
enlarge the region of quantum-enhanced precision by encompassing the newly
created phase boundaries. Our approach is general and can be applied to both
symmetry-breaking and topological quantum sensors. In symmetry-breaking
sensors, we show that the newly created critical points inherit the original
universality class. In topological sensors, our modular construction creates
multiple bands which leads to a rich phase diagram. In both cases, Heisenberg
scaling for Hamiltonian parameter estimation is achieved at all the phase
boundaries. This can be exploited to create a global sensor which significantly
outperforms a uniform probe.
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