Laboratory simulation of cosmic string formation in the early Universe using superfluid 3He

C Bäuerle, YM Bunkov, SN Fisher, H Godfrin… - Nature, 1996 - nature.com
TOPOLOGICAL defects in the geometry of space–time (such as cosmic strings) may have
played an important role in the evolution of the early Universe, by supplying initial density …

QUEST-DMC superfluid He detector for sub-GeV dark matter

QUEST-DMC collaboration, S Autti, A Casey… - The European Physical …, 2024 - Springer
The focus of dark matter searches to date has been on Weakly Interacting Massive Particles
(WIMPs) in the GeV/c 2-TeV/c 2 mass range. The direct, indirect and collider searches in this …

Generation and Detection of Quantum Turbulence in Superfluid

SN Fisher, AJ Hale, AM Guénault, GR Pickett - Physical Review Letters, 2001 - APS
We describe the first direct observations of turbulence in superfluid 3 He− B. The turbulence
is generated by a vibrating-wire resonator driven at velocities exceeding the pair-breaking …

Potential Dark Matter Detector? The Detection of Low Energy Neutrons by Superfluid He

DI Bradley, YM Bunkov, DJ Cousins, MP Enrico… - Physical review …, 1995 - APS
Using an existing experiment we have demonstrated in a pilot study that superfluid 3 He at
100 μK can be used as a nuclear recoil detector sensitive to neutron and γ interactions …

Direct measurement of the energy dissipated by quantum turbulence

DI Bradley, SN Fisher, AM Guénault, RP Haley… - Nature Physics, 2011 - nature.com
The lack of a general solution to the governing Navier–Stokes equations means that there is
no fundamental theory of turbulence. In the simpler case of pure quantum turbulence, the …

Fluctuations and Correlations of Pure Quantum Turbulence in Superfluid

DI Bradley, SN Fisher, AM Guénault, RP Haley… - Physical review …, 2008 - APS
We describe the first measurements of line-density fluctuations and spatial correlations of
quantum turbulence in superfluid He 3-B. All of the measurements are performed in the low …

The Damping of a Quartz Tuning Fork in Superfluid 3He-B at Low Temperatures

DI Bradley, P Crookston, SN Fisher, A Ganshin… - Journal of Low …, 2009 - Springer
We have measured the damping on a quartz tuning fork in the B-phase of superfluid 3 He at
low temperatures, below 0.3 T c. We present extensive measurements of the velocity …

Temperature scale and heat capacity of superfluid in the range

C Bäuerle, YM Bunkov, SN Fisher, H Godfrin - Physical Review B, 1998 - APS
We have recently performed accurate energy calibrations of a superfluid 3 He− B bolometer
at very low temperatures. The calibration process provides a measure of the heat capacity of …

Breaking the superfluid speed limit in a fermionic condensate

DI Bradley, SN Fisher, AM Guénault, RP Haley… - Nature Physics, 2016 - nature.com
Coherent condensates appear as emergent phenomena in many systems,,,,,,,. They share
the characteristic feature of an energy gap separating the lowest excitations from the …

Direct observation of the Andreev reflection of a beam of excitations in superfluid

MP Enrico, SN Fisher, AM Guénault, GR Pickett… - Physical review …, 1993 - APS
We describe the first direct measurement of the Andreev reflection of a beam of quasiparticle
excitations in the B phase of superfluid He 3 in the ballistic regime (T/T c≤ 0.2). The beam is …