Naslov
Is zero-point energy physical? A toy model for Casimir-like effect

Autori
Nikolić, Hrvoje

Izvornik
Annals of physics (0003-4916) 383 (2017); 181-195

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
zero-point energy ; vacuum ; Casimir effect ; van der Waals force

Sažetak
Zero-point energy is generally known to be unphysical. Casimir effect, however, is often presented as a counterexample, giving rise to a conceptual confusion. To resolve the confusion we study foundational aspects of Casimir effect at a qualitative level, but also at a quantitative level within a simple toy model with only 3 degrees of freedom. In particular, we point out that Casimir vacuum is not a state without photons, and not a ground state for a Hamiltonian that can describe Casimir force. Instead, Casimir vacuum can be related to the photon vacuum by a non-trivial Bogoliubov transformation, and it is a ground state only for an effective Hamiltonian describing Casimir plates at a fixed distance. At the fundamental microscopic level, Casimir force is best viewed as a manifestation of van der Waals forces.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA