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The ability to reliably prepare non-classical states will play a major role in the realization of quantum technology. NOON states, belonging to the class of Schroedinger cat states, have emerged as a leading candidate for several…

Quantum Physics · Physics 2022-05-04 Daniel S. Grun , Karin W. Wittmann , Leandro H. Ymai , Jon Links , Angela Foerster

Maximally entangled photon pairs with a spatial degree of freedom is a potential way for realizing high-capacity quantum computing and communication. However, methods to generate such entangled states with high quality, high brightness, and…

We propose an experimentally feasible scheme for generating a two $2\times4\times4$ dimensional photons hyperentangled state, entangled in polarization, frequency and spatial mode. This scheme is mainly based on a parametric down-conversion…

Quantum Physics · Physics 2013-04-30 Hong-Bo Xu , Kun Du , Cong-Feng Qiao

We propose a cavity-QED-based scheme of generating entanglement between atoms. The scheme is scalable to an arbitrary number of atoms, and can be used to generate a variety of multipartite entangled states such as the…

Quantum Physics · Physics 2008-03-21 Jaehak Lee , Jiyong Park , Sang Min Lee , Hai-Woong Lee , Ashfaq H. Khosa

We consider photonic arrays made from quantum emitters in optically coupled microcavities as a platform for entanglement generation. These offer a large degree of tunability with the possibility of site-selective optical excitation.…

Quantum Physics · Physics 2023-03-24 Marc Bostelmann , Steffen Wilksen , Frederik Lohof , Christopher Gies

In this paper we present a scheme for generation of two-photon EPR and W states in the cavity QED context. The scheme requires only one three-level Rydberg atom and two or three cavities. The atom is sent to interact with cavities…

Quantum Physics · Physics 2015-05-18 W. B. Cardoso , W. C. Qiang , A. T. Avelar , B. Baseia

The generation of entanglement between three identical coupled cavities, each containing a single three-level atom, is studied when the cavities exchange two coherent photons and are in the N=2, 4, and 6 manifolds, where $N$ represents the…

Quantum Physics · Physics 2019-08-06 Moorad Alexanian

We present a new mechanism that harnesses extremely weak Kerr-type nonlinearities in a single driven cavity to deterministically generate single photon Fock states, and more general photon-blockaded states. Our method is effective even for…

Quantum Physics · Physics 2023-08-15 Andrew Lingenfelter , David Roberts , A. A. Clerk

Entangled photon states attract tremendous interest as the most vivid manifestation of nonlocality of quantum mechanics and also for emerging applications in quantum information. Here we propose a mechanism of generation of…

Mesoscale and Nanoscale Physics · Physics 2013-02-22 Mikhail Tokman , Xianghan Yao , Alexey Belyanin

We study the generation of superpositions of N00N states by overlapping few-photon-subtracted squeezed vacuum states and coherent states on a 50/50 beam splitter. Assuming parameters that are feasible with current technology results in…

Quantum Physics · Physics 2016-07-06 Falk Töppel , Maria V. Chekhova , Gerd Leuchs

We report on the experimental generation of an entangled state with a spectrally pure heralded single-photon state and a weak coherent state. By choosing group-velocity matching in the nonlinear crystal, our system for producing entangled…

Photons in a nonlinear medium can repel or attract each other, resulting in a strongly correlated quantum many-body system. Typically, such strongly correlated states of light arise from the extreme nonlinearity granted by quantum emitters…

We propose to produce entanglement by measuring the transmission of an optical cavity. Conditioned on the detection of a reflected photon, pairs of atoms in the cavity are prepared in maximally entangled states. The success probability…

Quantum Physics · Physics 2009-11-07 Anders S. Sorensen , Klaus Molmer

Single-photons of well-defined polarisation that are deterministically generated in a single spatio-temporal field mode are the key to the creation of multi-partite entangled states in photonic networks. Here, we present a novel scheme to…

Quantum Physics · Physics 2015-06-26 T. Wilk , H. P. Specht , S. C. Webster , G. Rempe , A. Kuhn

Path-entangled N-photon states can be obtained through the coalescence of indistinguishable photons inside linear networks. They are key resources for quantum enhanced metrology, quantum imaging, as well as quantum computation based on…

We report an experiment to generate maximally entangled states of D-dimensional quantum systems, qudits, by using transverse spatial correlations of two parametric down-converted photons. Apertures with D-slits in the arms of the twin…

Quantum Physics · Physics 2009-11-10 Leonardo Neves , G. Lima , J. G. Aguirre Gómez , C. H. Monken , C. Saavedra , S. Pádua

We study the generation of Greenberger-Horne-Zeilinger (GHZ) states of three path-encoded photons. Inspired by the seminal work of Bouwmeester et al. [1] on polarization-entangled GHZ states, we find a corresponding path representation for…

Quantum Physics · Physics 2017-11-15 N. Bergamasco , M. Menotti , J. E. Sipe , M. Liscidini

We describe an assembly of N Cooper-pair boxes (CPB) contained in a single mode cavity. In the dispersive regime, the correlation between the cavity field and each Cooper-pair box results in an effective interaction between CPBs that can be…

Superconductivity · Physics 2007-05-23 Alexandre Guillaume , Jonathan P. Dowling

WaveguideQEDoffers the possibility of generating strong coherent atomic interactions either through appropriate atomic configurations in the dissipative regime or in the bandgap regime. In this work, we show how to harness these…

Quantum Physics · Physics 2017-04-11 V Paulisch , A González-Tudela , H J Kimble , J I Cirac

It has been shown that there are not only transverse but also longitudinal couplings between microwave fields and a superconducting qubit with broken inversion symmetry of the potential energy. Using multiphoton processes induced by…

Quantum Physics · Physics 2016-11-22 Yan-Jun Zhao , Chang-Qing Wang , Xiaobo Zhu , Yu-xi Liu
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