Electromechanical feedback control of nanoscale superflow

Abstract

Superfluid ${}^4$He is a promising material for optomechanical and electromechanical applications due to its low acoustic loss. Some of the more intriguing aspects of superfluidity -- the macroscopic coherence, topological nature of vorticity, and capability of supporting non-classical flows -- remain, however, poorly explored resources in opto- and electro-mechanical systems. Here, we present an electromechanical coupling to pure superflow inside a nanofluidic Helmholtz resonator with viscously clamped normal fluid. The system is capable of simultaneous measurement of displacement and velocity of the Helmholtz mechanical mode weakly driven by incoherent environmental noise. Additionally, we implement feedback capable of inducing self-oscillation of the non-classical acoustic mode, damping the motion below the ambient level, and tuning of the mode frequency.

arXiv comment12 pages, 5 figures

References in corpus (22)

• Analysis of radiation-pressure induced mechanical oscillation of an optical microcavity
• Feedback cooling of a cantilever's fundamental mode below 5 mK
• Introduction to quantum turbulence
• Coherent Quantum-Noise Cancellation for Optomechanical Sensors
• A general procedure for thermomechanical calibration of nano/micro-mechanical resonators
• Dynamical Backaction Magnomechanics
• Bulk crystalline optomechanics
• Approaching the motional ground state of a 10 kg object
• Laser cooling and control of excitations in superfluid helium
• Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip
• Superfluid Brillouin Optomechanics
• Quantum optomechanics in a liquid
• Cavity Optomechanics in a Levitated Helium Drop
• Stabilized Pair Density Wave via Nanoscale Confinement of Superfluid ${}^3$He
• Strong optical coupling through superfluid Brillouin lasing
• Detecting continuous gravitational waves with superfluid ${}^4$He
• Magnetic Actuation and Feedback Cooling of a Cavity Optomechanical Torque Sensor
• Ultra-Low Dissipation Superfluid Micromechanical Resonator
• Microphotonic Forces From Superfluid Flow
• Observation of bistable turbulence in quasi-two-dimensional superflow
• Photothermal optomechanics in superfluid helium coupled to a fiber-based cavity
• Quasiparticle Damping of Surface Waves in Superfluid ${}^3$He and ${}^4$He

Cited by in corpus (1)

• Surface-dominated finite size effects in nanoconfined superfluid helium