Generation of Bell, NOON and W states via atom interferometry

Islam, Rameez-ul; Khosa, Ashfaq H.; Saif, Farhan

doi:10.1088/0953-4075/41/3/035505

Cited by 35 publications

(47 citation statements)

References 69 publications

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“…1. The order of the Bragg diffraction j 0 describes the number of interactions of the atom with the cavity field and is always an even integer because during one Rabi cycle the momentum imparted to the atom, along the cavity axis, through its interaction with the field is either zero or 2hk [24,25], Thus the momenta acquired by the atom in first-, second-, and third-order Bragg diffraction from the cavity field will be (| Q 0) = l^k ),|G -2) = l-fik)), (|Go) = |2 /lk ),|e _ 4> = \-2 h k )), and (IGo) = |3/ik),|G-6) = |-3fik>), respectively, as a conse quence of the so-called Bragg resonances [27], Such an interaction of a two-level atom with quantized center-of-mass motion is governed by the interaction picture Hamiltonian, written under the dipole and rotating wave approximations as [22,23,25] -Q2 M c H i = ~ + -<r, + hfj. co s{kx)(a cr+ +<5'cr_).…”

Section: Atom Optics Based On Cavity-qed-assisted Bragg Diffractimentioning

confidence: 99%

“…We, in the present article, suggest a very simple scheme based on off-resonant atom-field interactions of two-level atoms in the Mach-Zehnder-Bragg interferometric scenario to implement QDCE through spatially separated atomic de Broglie waves that explicitly highlights the wave-particle dilemma in its conventional and more realistic sense. It is worth noting here that atomic Bragg diffraction has already been utilized to address various quantum-information tasks [21][22][23][24][25] as well as the foundational issues related to the concept of complementarity [10].…”

Section: Introductionmentioning

confidence: 99%

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Wheeler's delayed-choice experiment: A proposal for the Bragg-regime cavity-QED implementation

et al. 2015

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Wheeler's delayed-choice experiment highlights strange features of quantum theory such as pre-sensing of the experimental setup by the quantum object and the role of time. A recent proposal for such an experiment with an interferometer having a quantum beam splitter (QBS) [R. Ionicioiu and D. R. Terno, Phys. Rev. Lett. 107, 230406 (2011)] and its subsequent experimental implementations through photonics and NMR have produced results including the modification in the concept of complementarity. Here we propose a matter-wave Mach-Zehnder-Bragg cavity-QED interferometric setup with final QBS engineered through a cavity field that is taken initially in the superposition of zero and one photon. The setup operates through first-order off-resonant Bragg diffraction of the neutral atoms from the cavity fields with the matter wave's particle (wave) nature marked through the absence (presence) of a photon in the final cavity. The proposal, addressing the issue through atomic de Broglie waves, can be executed within the present cavity-QED experimental scenario with appreciable success probability and fidelity.

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Section: Atom Optics Based On Cavity-qed-assisted Bragg Diffractimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wheeler's delayed-choice experiment: A proposal for the Bragg-regime cavity-QED implementation

et al. 2015

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“…Interaction picture Hamiltonian describing the off-resonant interactions of a two-level atom with the cavity field under dipole and rotating wave approximation may be written as [22][23][24][25],Ĥ…”

Section: Bragg Diffraction and Engineering Of Basic Statesmentioning

confidence: 99%

“…However, almost all of this research is so for limited to only generation of either the cavity field states or the atomic internal states. Quantized atomic external momentum states present another attractive and viable candidate or alternative in this respect as many proposals exist to utilize this unique degree of freedom for quantum information processing [22][23][24][25][26][27][28]. All these suggestions, however, solely rely on quantized atom-field interactions in the cavity QED setups without invoking the use of beam splitter for state preparation and manipulation.…”

mentioning

confidence: 99%

Beam Splitter-Mediated Quantum Information Processing Employing Momentum States of the Neutral Atoms

2014

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We propose various schemes for the generation and manipulation of a variety of atomic external transverse momentum states. The fundamental ingredient of all such states is a simple bipartite cavity field-atomic momentum entangled state generated through second order, off-resonant Bragg diffraction of the neutral two-level atoms. Further multipartite entangled state engineering and manipulation including Bell, GHZ, Dicke and W-state production, remote state-assisted entanglement swapping, and teleportation of a cavity field superposition as well as the entanglement onto atomic momentum states are carried out by simultaneously projecting the cavity field(s) over symmetric beam splitter(s). It is further discussed that generation and manipulation of such decoherence resistant momentum states is quite feasible under prevailing experimental research scenario in cavity QED.Keywords Quantum informatics · Engineering entanglements · Cavity QED · Atom optics IntroductionQuantum information processing [1], a field that mostly relies on nonlocal features of entangled states [2, 3], aims to clarify philosophical foundations of the quantum theory [4] apart from its demonstrated technological impact like foolproof security (for comprehensive theoretical and experimental reviews on cryptography see [5,6]) and communicational speed up [7]. Diverse physical systems including photonics, Nuclear Magnetic Resonance (NMR), ions traps, quantum dots, Superconducting Quantum Interference Device (SQUID) and cavity Quantum Electrodynamics (QED) have been utilized to address the quantum information tasks [8] with cavity QED based on atom-field interaction being one of the pioneer and prominent system in this regard [9][10][11]. Cavity QED based technology has T. Abbas ( )

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“…Different schemes are proposed to engineer different types of entanglement such as Bell state, Noon state, Werner state, Cluster state, and graph state [5][6][7][8]. Entanglement engineering between two electromagnetic cavities, multimodes of single cavity [9,10] and atomic internal [11][12][13][14] and external degrees of freedom using Bragg diffraction regime [15] are also suggested.…”

Section: Introductionmentioning

confidence: 99%