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Quantum melting of two-component Rydberg crystals

Lan, Z; Li, W; Lesanovsky, I; (2016) Quantum melting of two-component Rydberg crystals. Physical Review A , 94 (5) , Article 051603(R). 10.1103/PhysRevA.94.051603. Green open access

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Abstract

We investigate the quantum melting of one-dimensional crystals that are realized in an atomic lattice in which ground state atoms are laser excited to two Rydberg states. We focus on a regime where both, intra- and interstate density-density interactions as well as coherent exchange interactions contribute. We determine stable crystalline phases in the classical limit and explore their melting under quantum fluctuations introduced by the excitation laser as well as two-body exchange. We find that within a specific parameter range quantum fluctuations introduced by the laser can give rise to a devil's staircase structure which one might associate with transitions in the classical limit. The melting through exchange interactions is shown to also proceed in a steplike fashion, in the case of small crystals, due to the proliferation of Rydberg spin waves.

Type: Article
Title: Quantum melting of two-component Rydberg crystals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevA.94.051603
Publisher version: https://doi.org/10.1103/PhysRevA.94.051603
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Optics, Physics, Atomic, Molecular & Chemical, Physics, GAS, EXCITATION, BLOCKADE, SYSTEMS, REGIME, RANGE, ATOMS, MODEL
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10066560
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