Generation of a highly phase sensitive polarization squeezed N-photon state by collinear parametric downconversion and coherent photon subtraction

Abstract

It is shown that a highly phase sensitive polarization squeezed (2n-1)-photon state can be generated by subtracting a diagonally polarized photon from the 2n photon component generated in collinear type II downconversion. This polarization wedge state has the interesting property that its photon number distribution in the horizontal and vertical polarizations remains sharply defined for phase shifts of up to 1/n between the circularly polarized components. Phase shifts at the Heisenberg limit are therefore observed as nearly deterministic transfers of a single photon between the horizontal and vertical polarization components.

7 pages, including 5 figures, improved explanation of interferometry (one new figure)

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Cited by in corpus (7)

• Demonstrating Heisenberg-limited unambiguous phase estimation without adaptive measurements
• All path-symmetric pure states achieve their maximal phase sensitivity in conventional two-path interferometry
• Effects of photon losses on phase estimation near the Heisenberg limit using coherent light and squeezed vacuum
• Multiphoton Quantum-State Engineering using Conditional Measurements
• Quantum enhancement of N-photon phase sensitivity by interferometric addition of down-converted photon pairs to weak coherent light
• Quantum-enhanced phase estimation using optical spin squeezing
• Multiphoton processes via conditional measurements in the two-field interaction