Dual chiral density wave induced oscillating Casimir effect
arxiv(2024)
摘要
The Casimir effect is known to be induced from photon fields confined by a
small volume, and also its fermionic counterpart has been predicted in a wide
range of quantum systems. Here, we investigate what types of Casimir effects
can occur from quark fields in dense and thin quark matter. In particular, in
the dual chiral density wave, which is a possible ground state of dense quark
matter, we find that the Casimir energy oscillates as a function of the
thickness of matter. This oscillating Casimir effect is regarded as an analog
of that in Weyl semimetals and is attributed to the Weyl points in the momentum
space of quark fields. In addition, we show that an oscillation is also induced
from the quark Fermi sea, and the total Casimir energy is composed of multiple
oscillations.
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