Work

Quantum enhanced phase retrieval

Year: 2016

Type: article

Abstract: The retrieval of phases from intensity measurements is a key process in many fields in science, from optical microscopy to x-ray crystallography. Here we study phase retrieval of a one-dimensional multi-phase object that is illuminated by quantum states of light. We generalize the iterative Gerchberg-Saxton algorithm to photon correlation measurements on the output plane, rather than the standard intensity measurements. We report a numerical comparison of classical and quantum phase retrieval of a small one-dimensional object of discrete phases from its far-field diffraction. While the classical algorithm was ambiguous and often converged to wrong solutions, quantum light produced a unique reconstruction with smaller errors and faster convergence. We attribute these improvements to a larger Hilbert space that constrains the algorithm.

Source: Optica

DOI: 10.1364/optica.3.000193

Authors: Liat Liberman, Yonatan Israel, Eilon Poem, Yaron Silberberg

Institutions: Weizmann Institute of Science, University of Oxford

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,208

Funders: European Commission, Minerva Foundation, Israel Science Foundation, European Research Council