Two-photon tomography using on-chip quantum walks

James G. Titchener; Alexander S. Solntsev; Andrey A. Sukhorukov

doi:10.1364/OL.41.004079

Two-photon tomography using on-chip quantum walks

James G. Titchener^*, Alexander S. Solntsev, Andrey A. Sukhorukov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

We present an approach to quantum tomography based on first expanding a quantum state across extra degrees of freedom and then exploiting the introduced sparsity to perform reconstruction. We formulate its application to photonic circuits and show that measured spatial photon correlations at the output of a specially tailored discrete-continuous quantum walk can enable full reconstruction of any two-photon spatially entangled and mixed state at the input. This approach does not require any tunable elements, so it is well suited for integration with on-chip superconducting photon detectors.

Original language	English
Pages (from-to)	4079-4082
Number of pages	4
Journal	Optics Letters
Volume	41
Issue number	17
DOIs	https://doi.org/10.1364/OL.41.004079
Publication status	Published - 1 Sept 2016

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10.1364/OL.41.004079

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abstract = "We present an approach to quantum tomography based on first expanding a quantum state across extra degrees of freedom and then exploiting the introduced sparsity to perform reconstruction. We formulate its application to photonic circuits and show that measured spatial photon correlations at the output of a specially tailored discrete-continuous quantum walk can enable full reconstruction of any two-photon spatially entangled and mixed state at the input. This approach does not require any tunable elements, so it is well suited for integration with on-chip superconducting photon detectors.",

author = "Titchener, {James G.} and Solntsev, {Alexander S.} and Sukhorukov, {Andrey A.}",

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Two-photon tomography using on-chip quantum walks

Abstract

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