Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Orbital angular momentum for quantum information processing

Vincenzo D’Ambrosio, Eleonora Nagali, Lorenzo Marrucci, Fabio Sciarrino

Published Apr 11, 2012• 12 citations
Publisher

Abstract

The orbital angular momentum carried by single photons represents a promising resource in the quantum information field. In this paper we report some recent results regarding the adoption of higher dimensional quantum states encoded in the polarization and orbital angular momentum for quantum information and cryptographic processing.
DOI
10.1117/12.924842

Related papers

Engineering of photonic orbital angular momentum quantum states for quantum information processing

Eleonora Nagali, Lorenzo Marrucci, Enrico Santamato +1 more

Among all degrees of freedom offered by single photons, the orbital angular momentum (OAM) has a great potential in the quantum information field, as it provides a natural choice for implementing single-photon qudits, the units of quantum information in a higher dimensional space. This can be an important practical advantage, as it enables higher security in quantum cryptographic protocols, as well as implications in fundamental quantum mechanics theory. Moreover, the combined use of different degrees of freedom of a photon, such as OAM and spin, enables the implementation of entirely new quantum tasks.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•May 1, 2011•0 citations

Polarization control of single photon quantum orbital angular momentum states

Eleonora Nagali, Fabio Sciarrino, F. De Martini +4 more

The orbital angular momentum of photons, being defined in an infinite-dimensional discrete Hilbert space, offers a promising resource for high-dimensional quantum information protocols in quantum optics. The biggest obstacle to its wider use is presently represented by the limited set of tools available for its control and manipulation. Here, we introduce and test experimentally a series of simple optical schemes for the coherent transfer of quantum information from the polarization to the orbital angular momentum of single photons and vice versa. All our schemes exploit a newly developed optical device, the so-called "q-plate", which enables the manipulation of the photon orbital angular momentum driven by the polarization degree of freedom. By stacking several q-plates in a suitable sequence, one can also have access to higher-order angular momentum subspaces. In particular, we demonstrate the control of the orbital angular momentum m degree of freedom within the subspaces of |m| = 2h and |m| = 4h per photon.

arXiv:0902.0740•Optics Express•Oct 2, 2009•75 citations

Fundamental tests on higher quantum dimensionality by exploiting the photonic orbital angular momentum

Eleonora Nagali, Vincenzo D’Ambrosio, Lorenzo Marrucci +1 more

The orbital angular momentum carried by single photons represents a promising resource in the quantum information field. In this paper we report a series of optical schemes adopted for the manipulation of quantum states encoded in the orbital angular momentum exploiting the q-plate device. We further demonstrate the capability of generating hybrid entangled states as well as quantum states in dimension higher than two. Indeed we present the manipulation of ququart states encoded in the polarization and orbital angular momentum, which have been adopted for new quantum cryptographic protocols

AIP conference proceedings•Jan 1, 2012•0 citations

Quantum storage of orbital angular momentum entanglement in cold atomic ensembles

Bao‐Sen Shi, Dong-Sheng Ding, Wei Zhang

Abstract Electromagnetic waves have both spin momentum and orbital angular momentum (OAM). Light carrying OAM has broad applications in micro-particle manipulation, high-precision optical metrology, and potential high-capacity optical communications. In the concept of quantum information, a photon encoded with information in its OAM degree of freedom enables quantum networks to carry much more information and increase their channel capacity greatly compared with those of current technology because of the inherent infinite dimensions for OAM. Quantum memories are indispensable to construct quantum networks. Storing OAM states has attracted considerable attention recently, and many important advances in this direction have been achieved during the past few years. Here we review recent experimental realizations of quantum memories using OAM states, including OAM qubits and qutrits at true single photon level, OAM states entangled in a two-dimensional or a high-dimensional space, hyperentanglement and hybrid entanglement consisting of OAM and other degree of freedom in a physical system. We believe that all achievements described here are very helpful to study quantum information encoded in a high-dimensional space.

Journal of Physics B Atomic Molecular and Optical Physics•Nov 20, 2017•29 citations

Hybrid single photon states: a resource for quantum communication and metrology

Vincenzo D’Ambrosio, Stephen Patrick Walborn, Leandro Aolita +4 more

Photon polarization is usually exploited for quantum communication tasks as well as for roll angles measurements. However, it is also possible to encode information in other degrees of freedom of single photons like path or orbital angular momentum. When two or more degrees of freedom are exploited at the same time we refer to it as hybrid encoding. Single photon hybrid states encoded in polarization and orbital angular momentum show properties that make such states a useful resource in quantum communication and in roll angle measurements. In the first case they allow two users to communicate without sharing a reference frame even in presence of turbulences, in the second one they provide a sensitivity enhancement of optical non-contact angular measurements.

Research in Optical Sciences•Jan 1, 2014•0 citations

Photon orbital angular momentum: generation, measurement and application to QKD

Miles J. Padgett, Daniel Giovannini, Martin P. J. Lavery +5 more

The information carried by a photon can be encoded in one or more of many different degrees of freedom. Beyond the two-dimensional space of polarisation (spin angular momentum) our interest lies in the unbounded yet discrete state space of Orbital Angular Momentum (OAM). We examine how photon pairs can be generated and measured over a large range of OAM states.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 19, 2012•2 citations
Among all degrees of freedom offered by single photons, the orbital angular momentum (OAM) has a great potential in the quantum information field, as it provides a natural choice for implementing single-photon qudits, the units of quantum information in a higher dimensional space. This can be an important practical advantage, as it enables higher security in quantum cryptographic protocols, as well as implications in fundamental quantum mechanics theory. Moreover, the combined use of different degrees of freedom of a photon, such as OAM and spin, enables the implementation of entirely new quantum tasks.
The orbital angular momentum of photons, being defined in an infinite-dimensional discrete Hilbert space, offers a promising resource for high-dimensional quantum information protocols in quantum optics. The biggest obstacle to its wider use is presently represented by the limited set of tools available for its control and manipulation. Here, we introduce and test experimentally a series of simple optical schemes for the coherent transfer of quantum information from the polarization to the orbital angular momentum of single photons and vice versa. All our schemes exploit a newly developed optical device, the so-called "q-plate", which enables the manipulation of the photon orbital angular momentum driven by the polarization degree of freedom. By stacking several q-plates in a suitable sequence, one can also have access to higher-order angular momentum subspaces. In particular, we demonstrate the control of the orbital angular momentum m degree of freedom within the subspaces of |m| = 2h and |m| = 4h per photon.
The orbital angular momentum carried by single photons represents a promising resource in the quantum information field. In this paper we report a series of optical schemes adopted for the manipulation of quantum states encoded in the orbital angular momentum exploiting the q-plate device. We further demonstrate the capability of generating hybrid entangled states as well as quantum states in dimension higher than two. Indeed we present the manipulation of ququart states encoded in the polarization and orbital angular momentum, which have been adopted for new quantum cryptographic protocols
Abstract Electromagnetic waves have both spin momentum and orbital angular momentum (OAM). Light carrying OAM has broad applications in micro-particle manipulation, high-precision optical metrology, and potential high-capacity optical communications. In the concept of quantum information, a photon encoded with information in its OAM degree of freedom enables quantum networks to carry much more information and increase their channel capacity greatly compared with those of current technology because of the inherent infinite dimensions for OAM. Quantum memories are indispensable to construct quantum networks. Storing OAM states has attracted considerable attention recently, and many important advances in this direction have been achieved during the past few years. Here we review recent experimental realizations of quantum memories using OAM states, including OAM qubits and qutrits at true single photon level, OAM states entangled in a two-dimensional or a high-dimensional space, hyperentanglement and hybrid entanglement consisting of OAM and other degree of freedom in a physical system. We believe that all achievements described here are very helpful to study quantum information encoded in a high-dimensional space.
Photon polarization is usually exploited for quantum communication tasks as well as for roll angles measurements. However, it is also possible to encode information in other degrees of freedom of single photons like path or orbital angular momentum. When two or more degrees of freedom are exploited at the same time we refer to it as hybrid encoding. Single photon hybrid states encoded in polarization and orbital angular momentum show properties that make such states a useful resource in quantum communication and in roll angle measurements. In the first case they allow two users to communicate without sharing a reference frame even in presence of turbulences, in the second one they provide a sensitivity enhancement of optical non-contact angular measurements.