Steering-enhanced quantum metrology using superpositions of quantum channels

• URL: http://arxiv.org/abs/2206.03760v2
• Date: Thu, 9 Jun 2022 13:12:36 GMT
• Title: Steering-enhanced quantum metrology using superpositions of quantum channels
• Authors: Kuan-Yi Lee, Jhen-Dong Lin, Adam Miranowicz, Franco Nori, Huan-Yu Ku, Yueh-Nan Chen
• Abstract summary: We consider a control system that manipulates the target to pass through superpositions of either dephased or depolarized phase shifts. We implement proof-of-principle experiments for a superposition of the dephased phase shifts on a IBM Quantum computer.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum steering is an important correlation in quantum information theory. A recent work [Nat. Commun. 12, 2410 (2021)] showed that quantum steering is also beneficial to quantum metrology. Here, we extend the exploration of this steering-enhanced quantum metrology from a noiseless regime to a superposition of noisy phase shifts in quantum channels. As concrete examples, we consider a control system that manipulates the target to pass through superpositions of either dephased or depolarized phase shifts. We show that the deterioration due to the noise can be mitigated by selecting the outcome on the control system. Further, we also implement proof-of-principle experiments for a superposition of the dephased phase shifts on a IBM Quantum computer. Our experimental results agree with the noise simulations that take into account the intrinsic errors of the device.

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