Local Fluctuations in Cavity Control of Ferroelectricity
- URL: http://arxiv.org/abs/2301.01884v2
- Date: Thu, 5 Oct 2023 02:53:19 GMT
- Title: Local Fluctuations in Cavity Control of Ferroelectricity
- Authors: Jonathan B. Curtis, Marios H. Michael, Eugene Demler
- Abstract summary: We study a quantum paraelectric sandwiched between two high-quality metal mirrors.
We find that once a continuum of transverse modes are included the cavity ends up suppressing ferroelectric correlations.
Our results are based on a general formalism and are expected to be widely applicable.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Control of quantum matter through resonant electromagnetic cavities is a
promising route towards establishing control over material phases and
functionalities. Quantum paraelectric insulators -- materials which are nearly
ferroelectric -- are particularly promising candidate systems for this purpose
since they have strongly fluctuating collective modes which directly couple to
the electric field. In this work we explore this possibility in a system
comprised of a quantum paraelectric sandwiched between two high-quality metal
mirrors, realizing a Fabry-Perot type cavity. By developing a full multimode,
continuum description we are able to study the effect of the cavity in a
spatially resolved way for a variety of system sizes and temperatures.
Surprisingly, we find that once a continuum of transverse modes are included
the cavity ends up suppressing ferroelectric correlations. This effect arises
from the screening out of transverse photons at the cavity boundaries and as a
result is confined to the surface of the paraelectric sample. We also explore
the temperature dependence of this effect and find it vanishes at high
temperatures, indicating it is a purely quantum mechanical effect. We connect
our result to calculations of Casimir and Van der Waals forces, which we argue
are closely related to the dipolar fluctuations in the quantum paraelectric.
Our results are based on a general formalism and are expected to be widely
applicable, paving the way towards studies of the quantum electrodynamics of
heterostructures featuring multiple materials and phases.
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