Relative-phase and time-delay maps all over the emission cone of hyperentangled photon source

Hegazy, Salem F.; El-Azab, Jala; Badr, Y.; Obayya, S. S. A.

doi:10.1117/1.oe.56.2.026114

Cited by 14 publications

(8 citation statements)

References 22 publications

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“…Equation ( 4) thus presents closed forms for the relative-phase and time-delay maps which give theoretical predictions equivalent to those of the iterative approach given in Ref. 26 . For convenience, the components of q 1 are substituted by the free-space emission angles in xz (horizontal) and yz (vertical) planes as…”

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confidence: 88%

Extended source of indistinguishable polarization-entangled photons over wide angles of emission

Hegazy

Obayya

2020

Applied Physics Letters

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The generation of high-fidelity polarization-entangled photon pairs, to date, has been demonstrated on specific spatial modes or over relatively narrow apertures. We put forward and demonstrate an experimental scheme to extend the temporal and spatial indistinguishability of polarization-entangled photons over wide emission angles, which can be applied to cover the whole spontaneous parametric downconversion (SPDC) cone. Over such a wide angular extent, while the time-delay map is almost flat which renders the conventional compensation via a birefringent element an appropriate approach, the relative-phase map—verified as a quadratic function—necessitates a tunable compensation paradigm. Here, to do so, we employ a phase-only two-dimensional spatial light modulator (2D SLM) loaded by the complementary of the relative phase map to equalize the phase variations for one third of the noncollinear SPDC emission. After eliminating the temporal and spatial distinguishability over the 2D SLM area, a 97% polarization visibility is verified for the entangled photon pairs scattered widely across the SPDC cone.

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confidence: 88%

Extended source of indistinguishable polarization-entangled photons over wide angles of emission

Hegazy

Obayya

2020

Applied Physics Letters

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“…Phase distortion Ψpkq originates from the SPDC process used to produce pairs of photons [19,68]. To characterise it, Alice and Bob perform a quantum holographic experiment using the scheme described in Fig.…”

Section: Details On Phase Distortion Characterisationmentioning

confidence: 99%

Polarization entanglement-enabled quantum holography

et al. 2021

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Holography is a cornerstone characterisation and imaging technique that can be applied to the full electromagnetic spectrum, from X-rays to radio waves or even particles such as neutrons. The key property in all these holographic approaches is coherence that is required to extract the phase information through interference with a reference beam -without this, holography is not possible. Here we introduce a holographic imaging approach that operates on intrinsically incoherent and unpolarised beams, so that no phase information can be extracted from a classical interference measurement. Instead, the holographic information is encoded in the second order coherence of entangled states of light. Using spatial-polarisation hyper-entangled photons pairs, we remotely reconstruct phase images of complex objects. Information is encoded into the polarisation degree of the entangled state, allowing us to image through dynamic phase disorder and even in the presence of strong classical noise, with enhanced spatial resolution compared to classical coherent holographic systems. Beyond imaging, quantum holography quantifies hyper-entanglement distributed over 10 4 modes via a spatially-resolved Clauser-Horne-Shimony-Holt inequality measurement, with applications in quantum state characterisation.

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“…Phase distortion Ψpkq originates from the SPDC process used to produce pairs of photons 19,38 . To characterise it, Alice and Bob perform a quantum holographic experiment using the scheme described in Fig.…”

Section: Details On Phase Distortion Characterisationmentioning

confidence: 99%

Polarization entanglement-enabled quantum holography

Defienne¹,

Ndagano²,

Lyons³

et al. 2019

Preprint

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Holography encodes information using classical light interference with applications ranging from microscopy to data storage. Quantum entanglement enables information processing with capabilities beyond technology based on classical principles. Here we introduce a holographic imaging concept that is conditioned on the coherence, and thus the entanglement, between the qubit terms in a quantum entangled photon state. By harnessing the nonlocal properties of entanglement, we remotely reconstruct an image encoded in the phase of spatial-polarisation hyper-entangled photons. Furthermore, we demonstrate that entanglement-encoded phase images can be retrieved even through dynamic phase disorder and in the presence of strong classical noise, with practical advantages over classical holography.

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Relative-phase and time-delay maps all over the emission cone of hyperentangled photon source

Cited by 14 publications

References 22 publications

Extended source of indistinguishable polarization-entangled photons over wide angles of emission

Extended source of indistinguishable polarization-entangled photons over wide angles of emission

Polarization entanglement-enabled quantum holography

Polarization entanglement-enabled quantum holography

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