Geometric phase in vacuum condensates, application to Unruh effect and to quantum thermometer

7th International Workshop DICE2014 Spacetime – Matter – Quantum Mechanics

物理学;力学

Capolupo, Antonio^1

Dipartimento di Fisica, E.R.Caianiello Universitá di Salerno, INFN Gruppo Collegato di Salerno, Fisciano (SA)

84084, Italy^1

关键词: Application range;    Bose-Einstein condensates;    Dynamical Casimir effect;    Geometric phase;    Particle creation;    Quantum field theory;    Two-level atom;    Vacuum condensates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/626/1/012060/pdf
DOI  :  10.1088/1742-6596/626/1/012060

学科分类：力学，机械学

来源: IOP

【 摘 要 】

We report on the recent results revealing the presence of the geometric phase in all the systems characterized by particle creation from vacuum and vacuum condensates. This fact makes the geometric phase a useful tool in the study and the understanding of disparate phenomena. Its possible application ranges from the dynamical Casimir effect to the Hawking effect, from quantum field theory in curved space to the study of CP and CPT symmetries, from the graphen physics to superconductivity and to the Bose Einstein condensate. Here, we consider the possibility of the detection of the Unruh effect and of the fabrication of a very precise quantum thermometer. We analyze the Mukunda-Simon phase for a two level atom system and consider two case: 1) atoms accelerated in electromagnetic field, and 2) atoms interacting with thermal states. The Mukunda-Simon phase generalizes the Berry phase to the case of non-cyclic and non-adiabatic evolutions; therefore it represents a more useful instrument in experimental implementations with respect to the Berry phase.