UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

NOON states via a quantum walk of bound particles

Compagno, E; Banchi, L; Gross, C; Bose, S; (2017) NOON states via a quantum walk of bound particles. PHYSICAL REVIEW A , 95 (1) , Article 012307. 10.1103/PhysRevA.95.012307. Green open access

[thumbnail of PhysRevA.95.012307.pdf]
Preview
Text
PhysRevA.95.012307.pdf - Published Version

Download (1MB) | Preview

Abstract

Tight-binding lattice models allow the creation of bound composite objects which, in the strong-interacting regime, are protected against dissociation. We show that a local impurity in the lattice potential can generate a coherent split of an incoming bound particle wave packet which consequently produces a NOON state between the endpoints. This is nontrivial because, when finite lattices are involved, edge-localization effects render challenging their use for nonclassical state generation and information transfer. We derive an effective model to describe the propagation of bound particles in a Bose–Hubbard chain. We introduce local impurities in the lattice potential to inhibit localization effects and to split the propagating bound particle, thus enabling the generation of distant NOON states. We analyze how minimal engineering transfer schemes improve the transfer fidelity and we quantify the robustness to typical decoherence effects in optical lattice implementations. Our scheme potentially has an impact on quantum-enhanced atomic interferometry in a lattice.

Type: Article
Title: NOON states via a quantum walk of bound particles
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevA.95.012307
Publisher version: http://dx.doi.org/10.1103/PhysRevA.95.012307
Additional information: © 2017 American Physical Society
Keywords: Science & Technology, Physical Sciences, Optics, Physics, Atomic, Molecular & Chemical, Physics, ENTANGLEMENT, HAMILTONIANS, DYNAMICS, LATTICE
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/1530471
Downloads since deposit
94Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item