aqora

Pulse Recycling and Weak Value Amplification for Precision Metrology

Trent Graham, Courtney L. Byard, Paul G. Kwiat +1 more

Bulletin of the American Physical SocietyJun 12, 20150 citations

Heisenberg-Limited Metrology via Weak-Value Amplification without Using Entangled Resources

Yosep Kim, Seung-Yeun Yoo, Yoon-Ho Kim

Weak-value amplification (WVA) provides a way for amplified detection of a tiny physical signal at the expense of a lower detection probability. Despite this trade-off, due to its robustness against certain types of noise, WVA has advantages over conventional measurements in precision metrology. Moreover, it has been shown that WVA-based metrology can reach the Heisenberg limit using entangled resources, but preparing macroscopic entangled resources remains challenging. Here, we demonstrate a novel WVA scheme based on iterative interactions, achieving the Heisenberg-limited precision scaling without resorting to entanglement. This indicates that the perceived advantages of the entanglement-assisted WVA are in fact due to iterative interactions between each particle of an entangled system and a meter, rather than coming from the entanglement itself. Our work opens a practical pathway for achieving the Heisenberg-limited WVA without using fragile and experimentally demanding entangled resources.Weak-value amplification (WVA) provides a way for amplified detection of a tiny physical signal at the expense of a lower detection probability. Despite this trade-off, due to its robustness against certain types of noise, WVA has advantages over conventional measurements in precision metrology. Moreover, it has been shown that WVA-based metrology can reach the Heisenberg limit using entangled resources, but preparing macroscopic entangled resources remains challenging. Here, we demonstrate a novel WVA scheme based on iterative interactions, achieving the Heisenberg-limited precision scaling without resorting to entanglement. This indicates that the perceived advantages of the entanglement-assisted WVA are in fact due to iterative interactions between each particle of an entangled system and a meter, rather than coming from the entanglement itself. Our work opens a practical pathway for achieving the Heisenberg-limited WVA without using fragile and experimentally demanding entangled resources.

arXiv:2109.03762Physical Review LettersJan 25, 202238 citations

Entanglement-free, Heisenberg-limited phase measurement

Higgins, Howard M. Wiseman, Pryde +2 more

Conference on Lasers and Electro-OpticsJan 1, 20080 citations

Heisenberg scaling of time-limited quantum metrology with realistic decoherence

Maxime Hardy, W. A. Coish

Bulletin of the American Physical SocietyFeb 28, 20120 citations

Hyperentanglement-enhanced weak value amplification with high-order correlation function

Jingzheng Huang, Qinzheng Li, Chen Fang +1 more

Abstract By exploiting hyperentanglement, we propose a new concrete scheme to realize weak value amplification, which can be implemented by N hyperentangled photons along with coincidence detection. Our scheme can optimally increase the amplification factor by a factor of N compared to the usage of N uncorrelated photons, and achieve the Heisenberg limit for the purpose of parameter estimation. We expect our study can inspire further investigation on the usage of hyperentanglement in weak measurement and quantum metrology.Abstract By exploiting hyperentanglement, we propose a new concrete scheme to realize weak value amplification, which can be implemented by N hyperentangled photons along with coincidence detection. Our scheme can optimally increase the amplification factor by a factor of N compared to the usage of N uncorrelated photons, and achieve the Heisenberg limit for the purpose of parameter estimation. We expect our study can inspire further investigation on the usage of hyperentanglement in weak measurement and quantum metrology.

arXiv:1508.01268Journal of Physics B Atomic Molecular and Optical PhysicsAug 26, 20150 citations

Qubit Quantum Metrology in the Regime of Limited Resources

Jason Saunders, Jean-François S. Van Huele

Bulletin of the American Physical SocietyMar 16, 20210 citations

Heisenberg-limited metrology via weak-value amplification without using entangled resources

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