Exact Results in Quantum Theory
sala 1.40, ul. Pasteura 5
2023-10-27 (14:15) 
Paweł Jakubczyk (IFT UW)
Casimir amplitudes and scaling functions for Bose gases with nonstandard dispersions
I will discuss the Casimir effect in mean-field Bose gases. Afterdemonstrating how varying the dispersion influences the Casimir effectfor realistic cases, I will analyse dispersions characterised byarbitrary power-law-type low-momentum asymptotic behavior. I will showthat the Casimir amplitudes are not well defined for the general caseand the physically relevant results are recovered by cancellation ofsingular factors.