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Quantum-enhanced distributed phase sensing with a truncated SU(1,1) interferometer

Journal Article · · Physical Review Research
 [1];  [2];  [2];  [3];  [4];  [2];  [2];  [2]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Yonsei Univ., Seoul (Korea, Republic of)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  3. Korea Institute of Science and Technology (KIST), Seoul (Korea, Republic of)
  4. Korea Institute of Science and Technology, Seoul (Korea)
In recent years, distributed quantum sensing has gained interest for a range of applications requiring networks of sensors, from global-scale clock synchronization to high energy physics. In particular, a network of entangled sensors can improve not only the sensitivity beyond the shot noise limit, but also enable a Heisenberg scaling with the number of sensors. Here, using bright entangled twin beams, we theoretically and experimentally demonstrate the detection of a linear combination of two distributed phases beyond the shot noise limit with a truncated SU(1,1) interferometer. Specifically, we show a quantum noise reduction of 1.7 ± 0.3 dB below what is possible with the corresponding classical configuration. Additionally, we theoretically extend the use of a truncated SU(1,1) interferometer to a multi-phase-distributed sensing scheme that leverages entanglement as a resource to achieve a quantum improvement in the scaling with the number of sensors in the network. Our results pave the way for developing quantum-enhanced sensor networks that can achieve an entanglement-enhanced sensitivity.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
Korea government (MSIT); National Research Foundation of Korea (NRF); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2573637
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Journal Issue: 2 Vol. 7; ISSN 2643-1564
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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