What is it about?
This article reviews the basic concepts, fundamental physical processes and latest progress of entanglement-enhanced quantum metrology, and also looks forward to some frontier issues worthy of attention in this field based on our experience and understanding.
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Why is it important?
Quantum metrology exploits entanglement to revolutionize measurements, aims at improving the measurement precision from the standard quantum limit to the Heisenberg limit. Thanks to the tunable nonlinearities and the well-developed techniques for quantum manipulation and detection, many groundbreaking experiments have demonstrated the generation and detection of entangled states in various quantum systems such as cold atoms, trapped ions etc. The entangled states can be sensitive probes for external forces and fields, which makes them ideal for high-precision measurement and sensing. The goal of this article is to review and illustrate the theory and the experiments that have demonstrated many-body quantum entanglement for quantum metrology and the prospects for applications in entanglement-enhanced quantum sensors.
Perspectives
I hope this review makes readers who are new to quantum metrology and sensing equip with the necessary fundamental concepts and provides a comprehensive understanding of entanglement-enhanced quantum metrology for broad audiences, covering its fundamental principles, experimental realization, and wide range of potential applications.
Jiahao Huang
Read the Original
This page is a summary of: Entanglement-enhanced quantum metrology: From standard quantum limit to Heisenberg limit, Applied Physics Reviews, July 2024, American Institute of Physics,
DOI: 10.1063/5.0204102.
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