Ethan Kleinbaum
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View article: Single phonon detection for dark matter via quantum evaporation and sensing of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>He</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Single phonon detection for dark matter via quantum evaporation and sensing of Open
Dark matter is five times more abundant than ordinary visible matter in our Universe. While laboratory searches hunting for dark matter have traditionally focused on the electroweak scale, theories of low mass hidden sectors motivate new d…
Single Phonon Detection for Dark Matter via Quantum Evaporation and Sensing of $^3$Helium Open
Dark matter is five times more abundant than ordinary visible matter in our Universe. While laboratory searches hunting for dark matter have traditionally focused on the electroweak scale, theories of low mass hidden sectors motivate new d…
Disorder broadening of even-denominator fractional quantum Hall states in the presence of a short-range alloy potential Open
We study energy gaps of the $\\nu=7/2$ and $\\nu=5/2$ fractional quantum Hall\nstates in a series of two-dimensional electron gases containing alloy disorder.\nWe found that gaps at these two filling factors have the same suppression rate\…
Thermopower-Based Hot Electron Thermometry of Helium Surface States at 1.6 K Open
We have developed a method to probe the temperature of surface state electrons (SSE) above a superfluid helium-4 surface using the Seebeck effect. In contrast to previously used SSE thermometry, this technique does not require detailed kno…
SKIFFS: Superconducting Kinetic Inductance Field-Frequency Sensors for sensitive magnetometry in moderate background magnetic fields Open
We describe sensitive magnetometry using lumped-element resonators fabricated from a superconducting thin film of NbTiN. Taking advantage of the large kinetic inductance of the superconductor, we demonstrate a continuous resonance frequenc…
Thermopower-based hot electron thermometry of helium surface states at 1.6 K Open
We have developed a method to probe the temperature of surface state electrons (SSE) above a superfluid Helium-4 surface using the Seebeck effect. In contrast to previously used SSE thermometry, this technique does not require detailed kno…
Finite-temperature behavior in the second Landau level of the two-dimensional electron gas Open
Reports of weak local minima in the magnetoresistance at $\nu=2+3/5$, $2+3/7$, $2+4/9$, $2+5/9$, $2+5/7$, and $2+5/8$ in the second Landau level of the electron gas in GaAs/AlGaAs left open the possibility of fractional quantum Hall states…
Probing Symmetry and Disorder Effects in the Fractional Quantum Hall States of the Second Landau Level Open
Electrons confined to two dimensions, cooled to cryogenic temperatures, and placed in a strong perpendicular magnetic field exhibit a set of ground states referred to as the fractional quantum Hall states (FQHS). The FQHSs forming in the r…