Dynamical backaction in nanoscale superfluid electromechanics
Abstract
Nanofluidic acoustic resonators employing superfluid 4He can be used to study quantized vortices from collective behavior in two-dimensional superfluid turbulence down to few individual vortices created by rotation. In order to improve sensitivity to the level needed for probing individual quantized vortices, readout mechanisms employing optomechanical or optomechanics-inspired approaches seem to be promising in this regard. In this work, we develop an electromechanical system, which couples a 4th sound acoustic resonance to a superconducting LC tank circuit in a sideband-resolved regime. Using this system, we demonstrate electromechanically induced transparency (EMIT), optical spring effect and optomechanical sideband damping and amplification. Furthermore, by rotating the cryostat, we demonstrate sensitivity to quantized vortices, which can become trapped and released in avalanche-like process inside the nanofluidic volume.
Related
- Dynamical superfluid and Bose-insulator phases in quantized microcavity lattices
- Classical and Loop Quantum Cosmology of Interacting Dark Energy: A Dynamical System Analysis with Superfluid Dark Matter and Dust Matter
- Improving precision scaling via backaction-evading continuous measurement in a driven-dissipative Kerr parametric oscillator
- Learning Midcircuit Measurement Backaction from Three Repeated Measurements
- Demonstrating the thermal noise limit in a backaction-free bulk acoustic wave resonator chain for gravitational wave detection
BibTeX
@misc{talir2026dynamical,
title = {{Dynamical backaction in nanoscale superfluid electromechanics}},
author = {Marek Talíř and Filip Novotný and Balázs Szalai and Nasiruddin Mondal and Emil Varga},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.29405},
eprint = {2608.29405},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.29405},
}
RIS
TY - UNPB
TI - Dynamical backaction in nanoscale superfluid electromechanics
AU - Marek Talíř
AU - Filip Novotný
AU - Balázs Szalai
AU - Nasiruddin Mondal
AU - Emil Varga
PY - 2026
DA - 2026/08/29
PB - arXiv
DO - 10.48550/arxiv.2608.29405
UR - https://arxiv.org/abs/2608.29405
AB - Nanofluidic acoustic resonators employing superfluid ^4He can be used to study quantized vortices from collective behavior in two-dimensional superfluid turbulence down to few individual vortices created by rotation. In order to improve sensitivity to the level needed for probing individual quantized vortices, readout mechanisms employing optomechanical or optomechanics-inspired approaches seem to be promising in this regard. In this work, we develop an electromechanical system, which couples a 4^th sound acoustic resonance to a superconducting LC tank circuit in a sideband-resolved regime. Using this system, we demonstrate electromechanically induced transparency (EMIT), optical spring effect and optomechanical sideband damping and amplification. Furthermore, by rotating the cryostat, we demonstrate sensitivity to quantized vortices, which can become trapped and released in avalanche-like process inside the nanofluidic volume.
ER -