| | | | | | | webmail : intra-extra| Accès VPN| Accès IST| Contact | English
Univ. Paris-Saclay

Sujet de stage / Master 2 Internship

Back to the internship list


Vacuum friction on colliding atomic and subatomic structures

Contact: Bercegol Herve, , herve.bercegol@cea.fr, +33 1 69 08 74 37
Summary:
The goal of this internship is to calculate the dynamical effect of the Dirac sea on atomic collisions, by due consideration of the underlying dynamics of electrons and protons.
Possibility of continuation in PhD: Oui
Deadline for application:15/04/2021

Full description:
The quantum vacuum is populated with fluctuating, lowest energy states of particles and fields, a typically quantum, rather fascinating feature . There are a few experimental demonstrations of consequences of vacuum fluctuations on static material structures, like the Lamb shift and the Casimir effect. When material systems evolve dynamically, a friction force is theoretically predicted, the so-called Dynamic Casimir Effect.
We have been investigating these phenomena as a possible cause of the second law of thermodynamics. Rotating pairs of atoms experience a torque from the zero-point electromagnetic field of the vacuum, calculated for identical as well as for dissimilar atoms . The material system exchanges angular momentum with the underlying vacuum.
This is reminiscent of the spin of the electron, which appears as intimately linked to the interaction of the particle with the vacuum fields: the zero-point electromagnetic field and Dirac field of electron-positron pairs. The goal of this internship is to calculate the dynamical effect of the Dirac sea on atomic collisions, by due consideration of the underlying dynamics of electrons and nuclei, protons to begin with.
Technics/methods used during the internship:
QED theory and calculation methods

Laboratory
Tutor of the internship

 

Retour en haut