Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.103604
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Funding
- ERC grant QUAMI
- ICore program of the ISF
- Israeli Nanotechnology FTA program
- Crown Photonics Center
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A quantum polarized light microscope using entangled NOON states with N = 2 and N = 3 is shown to provide phase supersensitivity beyond the standard quantum limit. We constructed such a microscope and imaged birefringent objects at a very low light level of 50 photons per pixel, where shot noise seriously hampers classical imaging. The NOON light source is formed by combining a coherent state with parametric down-converted light. We were able to show improved phase images with sensitivity close to the Heisenberg limit.
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