- Photon Transport in a Bose-Hubbard Chain of Superconducting Artificial Atoms
G. P. Fedorov et al., Phys. Rev. Lett. 126, 180503 (2021)
- Path-Dependent Supercooling of the
He3 Superfluid A-B Transition
Dmytro Lotnyk et al., Phys. Rev. Lett. 126, 215301 (2021)
- Superconductivity in an extreme strange metal
D. H. Nguyen et al., Nat Commun 12, 4341 (2021)
- High-Q Silicon Nitride Drum Resonators Strongly Coupled to Gates
Xin Zhou et al., Nano Lett. 21, 5738-5744 (2021)
- Measurement of the 229Th isomer energy with a magnetic micro-calorimeter
T. Sikorsky et al., Phys. Rev. Lett. 125 (2020) 142503
Operating Nanobeams in a Quantum FluidBradley, D. I. and George, R. and Guenault, A. M. and Haley, R. P. and Kafanov, S. and Noble, M. T. and Pashkin, Yu. A. and Pickett, G. R. and Poole, M. and Prance, J. R. and Sarsby, M. and Schanen, R. and Tsepelin, V. and Wilcox, T. and Zmeev, D. E.
Microelectromechanical (MEMS) and nanoelectromechanical systems (NEMS) are ideal candidates for exploring quantum fluids, since they can be manufactured reproducibly, cover the frequency range from hundreds of kilohertz up to gigahertz and usually have very low power dissipation. Their small size offers the possibility of probing the superfluid on scales comparable to, and below, the coherence length. That said, there have been hitherto no successful measurements of NEMS resonators in the liquid phases of helium. Here we report the operation of doubly-clamped aluminium nanobeams in superfluid 4He at temperatures spanning the superfluid transition. The devices are shown to be very sensitive detectors of the superfluid density and the normal fluid damping. However, a further and very important outcome of this work is the knowledge that now we have demonstrated that these devices can be successfully operated in superfluid 4He, it is straightforward to apply them in superfluid 3He which can be routinely cooled to below 100 μK. This brings us into the regime where nanomechanical devices operating at a few MHz frequencies may enter their mechanical quantum ground state.
Nature Scientific Reports 7, 4876 (2017)