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We present a novel method for efficient sorting of photons prepared in states of orbital angular momentum (OAM) and angular position (ANG). A log-polar optical transform is used in combination with a holographic beam-splitting method to…

Quantum Physics · Physics 2012-11-30 Malcolm N. O'Sullivan , Mohammad Mirhosseini , Mehul Malik , Robert W. Boyd

We demonstrate a general method of engineering the joint quantum state of photon pairs produced in spontaneous parametric downconversion (PDC). The method makes use of a superlattice structure of nonlinear and linear materials, in…

We suggest the generation of photon pairs in a thermally induced nonlinear periodically-poled silica fiber by spontaneous parametric down-conversion. Photons are generated directly in eigenstates of optical angular momentum. Photons in a…

Quantum Physics · Physics 2014-10-01 D. Javůrek , J. Svozilík , J. Peřina

Technology for forming stable states of dense high temperature plasma, which can be used, for example, for controlled thermo-nuclear synthesis.

General Physics · Physics 2008-04-16 S. I. Fisenko , I. S. Fisenko

Accurately controlling the quantum coherence of photons is pivotal for their applications in quantum sensing and quantum imaging. Here, we propose the utilization of quantum entanglement and local phase manipulation techniques to control…

Quantum Physics · Physics 2023-09-19 Dianzhen Cui , Xi-Lin Wang , X. X. Yi , Li-Ping Yang

We study theoretically the exchange of angular momentum between a photon beam and a plasma vortex, and demonstrate the possible excitation of photon angular momentum states in a plasma. This can be relevant to laboratory and space plasma…

Plasma Physics · Physics 2008-05-19 J. T. Mendonça , B. Thidé , J. E. S. Bergman , S. M. Mohammadi , B. Eliasson , W. Baan , H. Then

We propose and analyze a new method to produce single and entangled photons which does not require cavities. It relies on the collective enhancement of light emission as a consequence of the presence of entanglement in atomic ensembles.…

Quantum Physics · Physics 2007-05-23 D. Porras , J. I. Cirac

In this report, a novel methodology based on the static coherent states approach is introduced with the capability of calculating various strong-field laser-induced nonlinearities in full dimensional single-electron molecular systems; an…

Quantum Physics · Physics 2019-10-10 Mohammadreza Eidi , Mohsen Vafaee , Hamed Koochaki Kelardeh , Alexandra Landsman

An algebro-operator approach, called shape invariant potential method, of constructing generalized coherent states for photon-added particle system is presented. Illustration is given on Poschl-Teller potential.

Mathematical Physics · Physics 2017-04-21 Komi Sodoga , Isiaka Aremua , Mahouton Norbert Hounkonnou

Conditional addition of photons represents a crucial tool for optical quantum state engineering and it forms a fundamental building block of advanced quantum photonic devices. Here we report on experimental implementation of the conditional…

We describe a scheme that allows for the generation of any desired N-photon state on demand. Under ideal conditions, this requires only N single photon sources, laser pulses and linear optics elements. First, the sources should be…

Quantum Physics · Physics 2009-11-13 Almut Beige , Yuan Liang Lim , Christian Schoen

We propose two experimental schemes for producing coherent-state superpositions which approximate different nonclassical states conditionally in traveling optical fields. Although these setups are constructed of a small number of linear…

Quantum Physics · Physics 2018-02-21 Emese Molnar , Peter Adam , Gabor Mogyorosi , Matyas Mechler

We propose a universal scheme for the probabilistic generation of an arbitrary multimode entangled state of light with finite expansion in Fock basis. The suggested setup involves passive linear optics, single photon sources, strong…

Quantum Physics · Physics 2009-11-10 J. Fiurasek , S. Massar , N. J. Cerf

This technical note deals with the problem of asymptotically stabilizing the splay state configuration of a network of identical pulse coupled oscillators through the design of the their phase response function. The network of pulse coupled…

Systems and Control · Electrical Eng. & Systems 2021-04-14 Francesco Ferrante , Yongqiang Wang

The ability to entangle quantum systems is crucial for many applications in quantum technology, including quantum communication and quantum computing. Here, we propose a new, simple, and versatile setup for deterministically creating Bell…

Quantum Physics · Physics 2018-12-24 Vincenzo Macrì , Franco Nori , Anton Frisk Kockum

Photon pairs produced in spontaneous parametric down-conversion are naturally entangled in their transverse spatial degrees of freedom including the orbital angular momentum. Pumping a non-linear crystal with a zero order Gaussian mode…

Quantum Physics · Physics 2020-01-23 T. Häffner , G. L. Zanin , R. M. Gomes , L. C. Céleri , P. H. Souto Ribeiro

We provide a solution to the problem of determining whether a target pure state can be asymptotically prepared using dissipative Markovian dynamics under fixed locality constraints. Beside recovering existing results for a large class of…

Quantum Physics · Physics 2012-10-25 Francesco Ticozzi , Lorenza Viola

We propose a framework to analyze linear optical circuits based on an analogy with stabilizer formalism in quantum circuits, which provides efficiently computable formulas related to state discriminations. Hence, we analyze a Bell-state…

Quantum Physics · Physics 2023-01-18 Tomohiro Yamazaki , Rikizo Ikuta , Takashi Yamamoto

Spin-polarised atomic ensembles probed by light based on the Faraday interaction are a versatile platform for numerous applications in quantum metrology and quantum information processing. Here we consider an ensemble of Alkali atoms that…

Quantum Physics · Physics 2022-05-11 Alexander Roth , Klemens Hammerer , Kirill S. Tikhonov

The future of integrated quantum photonics relies heavily on the ability to engineer refined methods for preparing the quantum states needed to implement various quantum protocols. An important example of such states are quantum-correlated…

Quantum Physics · Physics 2018-02-28 Jesper B. Christensen , Jacob G. Koefoed , Karsten Rottwitt , Colin. J. McKinstrie