Quantum soliton evaporation

Leone Di Mauro Villari, Daniele Faccio, Fabio Biancalana, Claudio Conti

Research output: Contribution to journalArticle

2 Citations (Scopus)
12 Downloads (Pure)

Abstract

Quantum evaporation may occur in a variety of systems such as superfluids, Bose-Einstein condensates, and gravitational black holes (Hawking radiation). However, to date all predictions are based on semiclassical models, e.g., the Einstein equations and classical space-time metric for a black hole and only the fluctuations are quantized. Here we use a fully quantized dynamical equation, the quantum nonlinear Schrödinger equation, to study the evolution of quantum solitons. As a result of quantum fluctuations in the center-of-mass position, the expectation value of the quantum soliton width increases and concomitantly evaporates through the emission of frequency-entangled photon pairs. The frequency of this emission decreases as the soliton evaporates due to the soliton spreading. In the final phase, the soliton mean field collapses irreversibly into a state with zero mean amplitude. These results may provide insight to quantum evaporation in other systems where a full quantum description is still to be developed and highlights that even classically stable systems may also be subject to quantum evaporation.

Original languageEnglish
Article number043859
JournalPhysical Review A
Volume98
Issue number4
DOIs
Publication statusPublished - 31 Oct 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Di Mauro Villari, L., Faccio, D., Biancalana, F., & Conti, C. (2018). Quantum soliton evaporation. Physical Review A, 98(4), [043859]. https://doi.org/10.1103/PhysRevA.98.043859