Optical integration of a real-valued function by measurement of a Stokes parameter

Lemos, Gabriela Barreto; Ribeiro, P. H. Souto; Walborn, S. P.

doi:10.1364/josaa.31.000704

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…Significantly, the intrinsic polarisation dependent birefringence due to the liquid crystals has not been fully utilised for hybrid entanglement generation. So far, the polarisation dependent response of liquid crystal SLMs has been characterised as a quantum channel [36] and have been explored in order to implement optical computations [37,38] and spatially resolved photon-coincidence measurements [39,40].…”

Section: Introductionmentioning

confidence: 99%

An all-digital approach for versatile hybrid entanglement generation

Nape¹,

Oliveira²,

Slabbert³

et al. 2022

J. Opt.

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Hybrid entangled states present non-local correlations between photons with independent degrees of freedom and are currently gaining much interest. In particular, hybrid entanglement between polarisation and spatial modes of two photons are promising candidates for future heterogeneous quantum channels, but their versatility is limited by current generation methods that rely on static elements. Here, we present a technique that exploits polarisation and spatial mode dependent phase modulation in an all-digital approach using spatial light modulators. We show that we can tailor hybrid entangled states using spatial modes with Cylindrical and Cartesian symmetry, making our approach flexible, dynamic, and adaptable.

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Section: Introductionmentioning

confidence: 99%

An all-digital approach for versatile hybrid entanglement generation

Nape¹,

Oliveira²,

Slabbert³

et al. 2022

J. Opt.

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“…[8] the effects of a chaotic wave front on a polarization qubit was investigated, while in Ref. [22] an * gabriela.barreto.lemos@univie.ac.at optical integration method was demonstrated. In a very recent article [23], entanglement between transverse spatial variables of a pair of twin photons was detected through polarization measures.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a spatial light modulator as a polarization quantum channel

et al. 2014

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Spatial light modulators are versatile devices employed in a vast range of applications to modify the transverse phase or amplitude profile of an incident light beam. Most experiments are designed to use a specific polarization which renders optimal sensitivity for phase or amplitude modulation. Here we take a different approach and apply the formalism of quantum information to characterize how a phase modulator affects a general polarization state. In this context, the spatial modulators can be exploited as a resource to couple the polarization and the transverse spatial degrees of freedom. Using a quasimonochromatic single-photon beam obtained from a pair of twin photons generated by spontaneous parametric down conversion, we performed quantum process tomography in order to obtain a general analytic model for a quantum channel that describes the action of the device on the polarization qubits. We illustrate the application of these concepts by demonstrating the implementation of a controllable phase flip channel. This scheme can be applied in a straightforward manner to characterize the resulting polarization states of different types of phase or amplitude modulators and motivates the combined use of polarization and spatial degrees of freedom in innovative applications.

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“…Considering both the polarization and spatial degrees of freedom, the action of the SLM can be described by the operator where I is the identity. Using this coupling, quantum logic gates between polarization and spatial parity qubits have been implemented 32 , a qubit coupled to a chaotic quantum harmonic oscillator has been studied 33 , a single photon and classical channels have been multiplexed in a few-mode fiber 34 , spatial moments have been measured directly 35 , and an optical integration algorithm has been performed 36 . In Ref.…”

mentioning

confidence: 99%

“…The imperfect fidelity is due primarily to a slight decoherence of the polarization induced by the SLM. This decoherence can have a detrimental effect on quantum logic gates, and needs to be corrected in some situations 36 .…”

mentioning

confidence: 99%

Measuring spatial correlations of photon pairs by automated raster scanning with spatial light modulators

Paul

Hor-Meyll

Ribeiro

et al. 2014

Sci Rep

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We demonstrate the use of a phase-only spatial light modulator for the measurement of transverse spatial distributions of coincidence counts between twin photon beams, in a fully automated fashion. This is accomplished by means of the polarization dependence of the modulator, which allows the conversion of a phase pattern into an amplitude pattern. We also present a correction procedure, that accounts for unwanted coincidence counts due to polarization decoherence effects.

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Optical integration of a real-valued function by measurement of a Stokes parameter

Cited by 6 publications

References 22 publications

An all-digital approach for versatile hybrid entanglement generation

An all-digital approach for versatile hybrid entanglement generation

Characterization of a spatial light modulator as a polarization quantum channel

Measuring spatial correlations of photon pairs by automated raster scanning with spatial light modulators

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