Strange non-chaotic dynamics in a forced quantum system

Bhartiya, A. (Speaker)

Department of Quantum Dynamics and Classical Dynamics

Activity: Talk or presentation › Poster presentation › science-to-science

Description

We explore this question using the quantum analog of a classical impact oscillator, which consists of a forced spring-mass-damper system, with a wall it may collide against. The classical impact oscillator is known to undergo a sudden transition to chaos when the mass grazes the wall. We numerically compute the evolution of the wave function in the equivalent quantum system and investigate the dynamical
signatures. The entropy of the probability density and the L1 norm are used to generate real-valued time series, which are then subjected to diagnostic tests. Even though closed quantum systems with unitary evolution are incapable of showing chaotic behavior, we observe the characteristic features of strange nonchaotic dynamics in the forced system.

Period	27 Aug 2023 → 03 Sept 2023
Held at	École de Physique des Houches, France
Degree of Recognition	International

Fields of science

103 Physics, Astronomy

Documents & Links

The understanding of ultrafast photochemical reactions in complex molecular systems, exemplified by light harvesting in photosynthetic pigment-protein complexes and by the generation of excitons and free charges in optoelectronic materials, poses a formidable challenge. In order to unravel these photoinduced nonequilibrium phenomena, a multidisciplinary research effort is required, combining the most recent developments in ultrafast spectroscopies and molecular-level theory and computation.