Creation and Detection of Vector Vortex Modes for Classical and Quantum Communication

Ndagano, Bienvenu; Nape, Isaac; Cox, Mitchell A.; Rosales‐Guzmán, Carmelo; Forbes, Andrew

doi:10.1109/jlt.2017.2766760

Cited by 257 publications

(137 citation statements)

References 118 publications

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“…Although the scheme we present is filter based, i.e. filtering states one at a time, the experiment can be performed robustly and more efficiently using a deterministic detector for spin-orbit coupled states, sorting the modes in position [23]. This ensures high detection rates.…”

Section: Discussionmentioning

confidence: 99%

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

et al. 2018

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Using spatial modes for quantum key distribution (QKD) has become highly topical due to their infinite dimensionality, promising high information capacity per photon. However, spatial distortions reduce the feasible secret key rates and compromise the security of a quantum channel. In an extreme form such a distortion might be a physical obstacle, impeding line-ofsight for free-space channels. Here, by controlling the radial degree of freedom of a photon's spatial mode, we are able to demonstrate hybrid high-dimensional QKD through obstacles with self-reconstructing single photons. We construct high-dimensional mutually unbiased bases using spin-orbit hybrid states that are radially modulated with a non-diffracting Bessel-Gaussian (BG) profile, and show secure transmission through partially obstructed quantum links. Using a prepare-measure protocol we report higher quantum state self-reconstruction and information retention for the non-diffracting BG modes as compared to Laguerre-Gaussian modes, obtaining a quantum bit error rate (QBER) that is up to 3× lower. This work highlights the importance of controlling the radial mode of single photons in quantum information processing and communication as well as the advantages of QKD with hybrid states.

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Section: Discussionmentioning

confidence: 99%

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

et al. 2018

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“…Due to their distinctive polarization distributions, VV beams have shown unique features, making them appealing for different research purposes, e.g. microscopy [54], optical trapping [55,56], metrology [57,58], nanophotonics [59] and communication [60][61][62][63][64][65][66][67]. Formally, the state |R, (|L, ) describes a photon with uniform right (left) circular polarization carrying of OAM, and a VV beam can be conveniently described by a non-separable superposition of polarization-OAM eigenmodes.…”

Section: Vector Vortex Beam and Hybrid Entanglement Generationmentioning

confidence: 99%

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

et al. 2019

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Entanglement distribution between distant parties is one of the most important and challenging tasks in quantum communication. Distribution of photonic entangled states using optical fiber links is a fundamental building block towards quantum networks. Among the different degrees of freedom, orbital angular momentum (OAM) is one of the most promising due to its natural capability to encode high dimensional quantum states. In this article, we experimentally demonstrate fiber distribution of hybrid polarization-vector vortex entangled photon pairs. To this end, we exploit a recently developed air-core fiber which supports OAM modes. High fidelity distribution of the entangled states is demonstrated by performing quantum state tomography in the polarization-OAM Hilbert space after fiber propagation, and by violations of Bell inequalities and multipartite entanglement tests. The present results open new scenarios for quantum applications where correlated complex states can be transmitted by exploiting the vectorial nature of light.

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“…The following represents the four polarization states in Dirac notation and Jones vector . Equation is a linear polarization, which is a state representation of right and left circular polarization.

(〉|, LP) = (〉|, RH) + ∣ (〉, LH) .

…”

Section: Introductionmentioning

confidence: 99%

Transmission of classically entangled beams through mouse brain tissue

Mamani

Shi

Ahmed

et al. 2018

Journal of Biophotonics

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Light transmission of Laguerre-Gaussian vector vortex beams in different local regions in mouse brain tissue is investigated. Transmittance is measured in the ballistic and diffusive regions with various polarizations states and orbital angular momentums (OAM). The transmission change observed with structured light other than linear polarization is attributed to chiroptical phenomena from the chiral brain media and the handedness of the light. For instance, classically entangled beams showed higher transmittance and constant value dependency on OAM modes than linear modes did. Also, circular polarization beam transmittance showed strong increase with topical charge OAM ( ℓ), which could be attributed to chiroptical effect.

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Creation and Detection of Vector Vortex Modes for Classical and Quantum Communication

Cited by 257 publications

References 118 publications

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states

Air-core fiber distribution of hybrid vector vortex-polarization entangled states

Transmission of classically entangled beams through mouse brain tissue

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