Quantum information with even and odd states of orbital angular momentum of light

Perumangatt, Chithrabhanu; Lal, Nijil; Anwar, Ali; Reddy, Salla Gangi; Singh, R. P.

doi:10.1016/j.physleta.2017.04.002

Cited by 25 publications

(15 citation statements)

References 29 publications

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“…Phase singularities have many applications [22,[41][42][43][44][45][46][47][48][49][50][51][52][53]. However, they are not useful in some situations [54][55][56].…”

Section: Phase Singularitymentioning

confidence: 99%

“…Application of singular optics arising due to the OAM carried by vortex beams [382][383][384][385][386][387][388][389][390][391], include trapping [392][393][394][395][396][397][398][399] and rotation [210,[400][401][402][403][404][405][406][407] of microscopic particles. ese OAM states being orthogonal can be used as transmitting channels [22,52,53,[408][409][410] in free space as well as in fibers for communication. Vortex states were also tried for underwater communication [411] and free space communication [412].…”

Section: Literature Survey Of Phase and Polarization Singularitiesmentioning

confidence: 99%

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Phase Singularities to Polarization Singularities

Ruchi

Senthilkumaran

Pal

2020

International Journal of Optics

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Polarization singularities are superpositions of orbital angular momentum (OAM) states in orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the helical wavefronts of phase singularities. In phase singularities, circulating phase gradients and, in polarization singularities, circulating ϕ12 Stokes phase gradients are present. At the phase and polarization singularities, undefined quantities are the phase and ϕ12 Stokes phase, respectively. Conversion of circulating phase gradient into circulating Stokes phase gradient reveals the connection between phase (scalar) and polarization (vector) singularities. We demonstrate this by theoretically and experimentally generating polarization singularities using phase singularities. Furthermore, the relation between scalar fields and Stokes fields and the singularities in each of them is discussed. This paper is written as a tutorial-cum-review-type article keeping in mind the beginners and researchers in other areas, yet many of the concepts are given novel explanations by adopting different approaches from the available literature on this subject.

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“…Phase singularities have many applications [22,[41][42][43][44][45][46][47][48][49][50][51][52][53]. However, they are not useful in some situations [54][55][56].…”

Section: Phase Singularitymentioning

confidence: 99%

Section: Literature Survey Of Phase and Polarization Singularitiesmentioning

confidence: 99%

Phase Singularities to Polarization Singularities

Ruchi

Senthilkumaran

Pal

2020

International Journal of Optics

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“…The study of quNits is not just of academic interest. For example, quantum communication protocols have been implemented employing orbital angular momentum (OAM) states of light [17,18]. Similarly, path and time degrees of freedom using multi-port beam-splitters and pulses in different slots are also employed (see [19,20] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Error-immune quantum communication

Bala

Ravishankar²

2021

Preprint

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Environmental effects on the transmission of a state result, in general, in a change in the information carried by it. To mitigate this, many techniques such as quantum error-correcting codes, decoherence-free-subspaces [Rev Mod Phys, 88(4):041001, 2016] are employed. The basic idea underlying them is to protect/recover the state. These techniques require multi-party entanglement, whose generation is a difficult task. Further, retrieval of information would require complete tomography, which inevitably requires a large number of copies. Taking this into account, in this work, a formalism has been laid down which does not require recovery of a state. The formalism employs scaling laws to obtain quantities that remain invariant under a noisy evolution of a state. The information encoded in these invariant quantities can be transmitted in an error-immune manner. Since multiparty entanglement and error detection/correction will not be required, the proposed scheme would be cost-effective and may be reliably employed for error-free information transfer. Employing the formalism, we have obtained invariant quantities for various noisy channels of a qubit and a quNit.

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“…They each form a complete orthonormal basis with infinite dimensionality [13,16,17]. Access to higher * corresponding author, alianwarma@gmail.com dimensions in Hilbert space makes OAM of light a suitable candidate for realizing new types of secure quantum information schemes [9,18,19].…”

Section: Introductionmentioning

confidence: 99%

Selective tuning of Hilbert spaces in states encoded with spatial modes of light

Anwar,

Lal,

Prabhakar

et al. 2019

Preprint

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Quantum information with even and odd states of orbital angular momentum of light

Cited by 25 publications

References 29 publications

Phase Singularities to Polarization Singularities

Phase Singularities to Polarization Singularities

Error-immune quantum communication

Selective tuning of Hilbert spaces in states encoded with spatial modes of light

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