Optical Phase Measurement Using a Deterministic Source of Entangled Multi-photon States

• URL: http://arxiv.org/abs/2002.08715v1
• Date: Thu, 20 Feb 2020 13:04:07 GMT
• Title: Optical Phase Measurement Using a Deterministic Source of Entangled Multi-photon States
• Authors: Giora Peniakov, Zu-En Su, Ayal Beck, Dan Cogan, Or Amar, and David Gershoni
• Abstract summary: Entangled multi-photon states have been suggested for performing such measurements with precision that significantly surpasses the shot-noise limit. Here, we use a semiconductor quantum dot to generate entangled multi-photon states in a deterministic manner. This way we entangle photons one-by-one at a rate which exceeds 300 MHz.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Precision measurements of optical phases have many applications in science and technology. Entangled multi-photon states have been suggested for performing such measurements with precision that significantly surpasses the shot-noise limit. Until recently, such states have been generated mainly using spontaneous parametric down-conversion -- a process which is intrinsically probabilistic, counteracting the advantages that the entangled photon states might have. Here, we use a semiconductor quantum dot to generate entangled multi-photon states in a deterministic manner, using periodic timed excitation of a confined spin. This way we entangle photons one-by-one at a rate which exceeds 300 MHz. We use the resulting multi-photon state to demonstrate super-resolved optical phase measurement. Our results open up a scalable way for realizing genuine quantum enhanced super-sensitive measurements in the near future.

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