Interferometric Methods to Measure Orbital and Spin, or the Total Angular Momentum of a Single Photon

Leach, Jonathan; Courtial, Johannes; Skeldon, K. D.; Barnett, Stephen M.; Franke‐Arnold, Sonja; Padgett, Miles J.

doi:10.1103/physrevlett.92.013601

Cited by 329 publications

(219 citation statements)

References 21 publications

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“…The main difficulty in the practical use of this phenomenon consist in the problem of measurement the OAM value of a photon and in search of the appropriate transmission medium for such beams. Some methods have been developed, which allows to measure OAM value of a photons: the measurement method with generating hologram [9], the sorting method using the Mach-Zehnder interferometers cascade [10,11,12], the method of optical geometric transformation [13,14] and etc.…”

Section: Orbital Angular Momentum Of Photonmentioning

confidence: 99%

Symmetric encryption algorithm using “twisted” light

Burlov¹,

Gorokhov²

2017

Collection of Selected Papers of the III International Conference on Information Technology and Nanotechnology

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An algorithm for applying a "twisted" light for constructing an encryption scheme is described. Our approach is founded on famous classical symmetric permutation algorithm based on NP-full task for "Knapsack Problem" with changes taken into account the quantum origin of the information carrier. As a measuring device for selection of pure states from a mixed one, the Mach-Zehnder interferometer cascade is supposed to use, which allows sorting the parity of the mixed state of the orbital angular momentum (OAM) of photons.

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Section: Orbital Angular Momentum Of Photonmentioning

confidence: 99%

Symmetric encryption algorithm using “twisted” light

Burlov¹,

Gorokhov²

2017

Collection of Selected Papers of the III International Conference on Information Technology and Nanotechnology

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show abstract

“…Such states have been under investigation for some time in the discrete variable regime. Techniques have been established to detect the orbital angular momentum properties of single photons [9,10,11]; and discrete-variable multi-dimensional entanglement between orbital angular momentum states has been proposed [12,13] and demonstrated [14]. However, to date, non-classical orbital angular momentum states have not been investigated for the continuous variable regime, that is relevant in many applications [15,16,17,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Spatial-state Stokes-operator squeezing and entanglement for optical beams

2009

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The transverse spatial attributes of an optical beam can be decomposed into the position, momentum and orbital angular momentum observables. The position and momentum of a beam is directly related to the quadrature amplitudes, whilst the orbital angular momentum is related to the polarization and spin variables. In this paper, we study the quantum properties of these spatial variables, using a representation in the Stokes-operator basis. We propose a spatial detection scheme to measure all three spatial variables and consequently, propose a scheme for the generation of spatial Stokes operator squeezing and entanglement.

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“…Several approaches to efficiently de-multiplexing OAM states have been described in the literature. Leach et al [13] presented a technique for sorting single photons according to the parity of the OAM states. In this approach, a cascade of interferometers would be required to de-multiplex more than two OAM states.…”

Section: Introductionmentioning

confidence: 99%