Quantum soliton evaporation

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
36 Downloads (Pure)


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
Issue number4
Publication statusPublished - 31 Oct 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Quantum soliton evaporation'. Together they form a unique fingerprint.

Cite this