Metrology with PT -Symmetric Cavities: Enhanced Sensitivity near the PT -Phase Transition

Zhong Peng Liu; Jing Zhang; Şahin Kaya Özdemir; Bo Peng; Hui Jing; Xin You Lü; Chun Wen Li; Lan Yang; Franco Nori; Yu Xi Liu

doi:10.1103/PhysRevLett.117.110802

Metrology with PT -Symmetric Cavities: Enhanced Sensitivity near the PT -Phase Transition

Zhong Peng Liu, Jing Zhang, Şahin Kaya Özdemir, Bo Peng, Hui Jing, Xin You Lü, Chun Wen Li, Lan Yang, Franco Nori, Yu Xi Liu

Research output: Contribution to journal › Article › peer-review

367 Scopus citations

Abstract

We propose and analyze a new approach based on parity-time (PT) symmetric microcavities with balanced gain and loss to enhance the performance of cavity-assisted metrology. We identify the conditions under which PT-symmetric microcavities allow us to improve sensitivity beyond what is achievable in loss-only systems. We discuss the application of PT-symmetric microcavities to the detection of mechanical motion, and show that the sensitivity is significantly enhanced near the transition point from unbroken- to broken-PT regimes. Our results open a new direction for PT-symmetric physical systems and it may find use in ultrahigh precision metrology and sensing.

Original language	English
Article number	110802
Journal	Physical Review Letters
Volume	117
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.117.110802
State	Published - Sep 7 2016

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10.1103/PhysRevLett.117.110802

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title = "Metrology with PT -Symmetric Cavities: Enhanced Sensitivity near the PT -Phase Transition",

abstract = "We propose and analyze a new approach based on parity-time (PT) symmetric microcavities with balanced gain and loss to enhance the performance of cavity-assisted metrology. We identify the conditions under which PT-symmetric microcavities allow us to improve sensitivity beyond what is achievable in loss-only systems. We discuss the application of PT-symmetric microcavities to the detection of mechanical motion, and show that the sensitivity is significantly enhanced near the transition point from unbroken- to broken-PT regimes. Our results open a new direction for PT-symmetric physical systems and it may find use in ultrahigh precision metrology and sensing.",

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AU - Özdemir, Şahin Kaya

AU - Peng, Bo

AU - Jing, Hui

AU - Lü, Xin You

AU - Li, Chun Wen

AU - Yang, Lan

AU - Nori, Franco

AU - Liu, Yu Xi

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AB - We propose and analyze a new approach based on parity-time (PT) symmetric microcavities with balanced gain and loss to enhance the performance of cavity-assisted metrology. We identify the conditions under which PT-symmetric microcavities allow us to improve sensitivity beyond what is achievable in loss-only systems. We discuss the application of PT-symmetric microcavities to the detection of mechanical motion, and show that the sensitivity is significantly enhanced near the transition point from unbroken- to broken-PT regimes. Our results open a new direction for PT-symmetric physical systems and it may find use in ultrahigh precision metrology and sensing.

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Metrology with PT -Symmetric Cavities: Enhanced Sensitivity near the PT -Phase Transition

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