Recent technological developments like nanoapparatus, Bose-Einstein condensates and devices for quantum information, are requiring more detailed mathematical models capable to describe them. In addition, it becomes important to have a rigorous description o f the decoherence phenomenon, whose role is to depress the quantum features of such devices. In our project we propose to study the scaling limits best fitting two relevant regimes for quantum systems: the Bose-Einstein condensate and the and quot;low-density of scatterers and quot; regime. In particular, we aim to approach the problems of rigorous deriving the two effective equations related to such regimes, the Gross-Pitaevskii and the Linear Quantum Boltzmann, respectively.
The insertion of decoherence would be made by coupling the system of interest with an environment modelled as a large number of light particles. The main achievement would be to give a rigorous and unified treatment of the two quantum regimes starting from the fundamental Schroedinger equation. In this direction, during the last five years several results have been obtained separately by the applicant, the scientist in charge, and other groups.
We distinguish between short and long-term objectives. The former count: improvement of the already existing derivation of the Gross-Pitaevskii hierarchy; study of the motion of a one-dimensional particle in the presence of a large number of scatterers; analysis, in this context, of a particular non Markovian limit. The latter are: full derivation of the Gross-Pitaevskii equation in one, two and three dimensions; full derivation of an effective equation for the one-dimensional low-density limit; estimate of the decoherence effect.
Field of science
- /natural sciences/physical sciences/condensed matter physics/bose-einstein condensates
- /natural sciences/mathematics/applied mathematics/mathematical model
Call for proposal
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