Wavefunction collapse driven by non-Hermitian disturbance
Martínez Romeral, Jorge (Universitat Autònoma de Barcelona. Departament de Física)
Foa Torres, Luis E.F. (Universidad de Chile. Departamento de Física)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Date:	2024
Abstract:	In the context of the measurement problem, we propose to model the interaction between a quantum particle and an 'apparatus' through a non-Hermitian Hamiltonian term. We simulate the time evolution of a normalized quantum state split into two spin components (via a Stern-Gerlach experiment) and that undergoes a wavefunction collapse driven by a non-Hermitian Hatano-Nelson Hamiltonian. We further analyze how the strength and other parameters of the non-Hermitian perturbation influence the time-to-collapse of the wave function obtained under a Schödinger-type evolution. We finally discuss a thought experiment where manipulation of the apparatus could challenge standard quantum mechanics predictions.
Grants:	Agencia Estatal de Investigación CEX2021-001214-S
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Carta ; recerca ; Versió publicada
Subject:	Quantum mechanics ; Meassurement problem ; Non-hermitian physics
Published in:	Journal of Physics Communications, Vol. 8, Issue 7 (July 2024) , art. 71001, ISSN 2399-6528

DOI: 10.1088/2399-6528/ad5b37

7 p, 1.1 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles