Andrew Fefferman
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View article: Quantitative calibration of a traveling-wave parametric amplifier applied to an optomechanical platform
Quantitative calibration of a traveling-wave parametric amplifier applied to an optomechanical platform Open
In the last decade, the microwave quantum electronics toolbox has been enriched with quantum limited detection devices such as Traveling Wave Parametric Amplifiers (TWPAs). The extreme sensitivity they provide is not only mandatory for som…
View article: Aluminum Goalpost Nano-mechanical Devices at Low Temperatures
Aluminum Goalpost Nano-mechanical Devices at Low Temperatures Open
View article: Aluminum goalpost nano-mechanical devices at low temperatures
Aluminum goalpost nano-mechanical devices at low temperatures Open
Mechanical objects have been widely used at low temperatures for decades, for various applications; from quantum fluids sensing with vibrating wires or tuning forks, to torsional oscillators for the study of mechanical properties of glasse…
View article: Self-sustained optomechanical state destruction triggered by the Kerr nonlinearity
Self-sustained optomechanical state destruction triggered by the Kerr nonlinearity Open
Cavity optomechanics implements a unique platform where moving objects can be probed by quantum fields, either laser light or microwave signals. With a pump tone driving at a frequency above the cavity resonance, self-sustained oscillation…
View article: Aluminum nuclear demagnetization refrigerator for powerful continuous\n cooling
Aluminum nuclear demagnetization refrigerator for powerful continuous\n cooling Open
Many laboratories routinely cool samples to 10 mK, but relatively few can\ncool condensed matter below 1 mK. Easy access to the microkelvin range would\npropel fields such as quantum sensors and quantum materials. Such temperatures\nare ac…
View article: Progress Toward Detection of Individual TLS in Nanomechanical Resonators
Progress Toward Detection of Individual TLS in Nanomechanical Resonators Open
View article: Self-sustained optomechanical state destruction triggered by the Kerr nonlinearity
Self-sustained optomechanical state destruction triggered by the Kerr nonlinearity Open
Cavity optomechanics implements a unique platform where moving objects can be probed by quantum fields, either laser light or microwave signals. With a pump tone driving at a frequency above the cavity resonance, self-sustained oscillation…
View article: Nano-beam clamping revisited
Nano-beam clamping revisited Open
Within recent years, the field of nano-mechanics has diversified in a variety of applications, ranging from quantum information processing to biological molecules recognition. Among the diversity of devices produced these days, the simples…
View article: Nanomechanical damping via electron-assisted relaxation of two-level systems
Nanomechanical damping via electron-assisted relaxation of two-level systems Open
We report on measurements of dissipation and frequency noise at millikelvin temperatures of nanomechanical devices covered with aluminum. A clear excess damping is observed after switching the metallic layer from superconducting to the nor…
View article: Thermodynamics of a single mesoscopic phononic mode
Thermodynamics of a single mesoscopic phononic mode Open
In recent decades, the laws of thermodynamics have been pushed down to smaller and smaller scales, within the theoretical field of stochastic thermodynamics and state-of-the-art experiments performed on microfabricated mesoscopic systems. …
View article: Nano-beam clamping revisited
Nano-beam clamping revisited Open
Within recent years, the field of nano-mechanics has diversified in a variety of applications, ranging from quantum information processing to biological molecules recognition. Among the diversity of devices produced these days, the simples…
View article: Thermodynamics of a Single Mesoscopic Phononic Mode
Thermodynamics of a Single Mesoscopic Phononic Mode Open
In recent decades, the laws of thermodynamics have been pushed down to smaller and smaller scales, within the field of stochastic thermodynamics and state-of-art experiments performed on mesoscopic systems. These measurements concern elect…
View article: Fully Suspended Nano-beams for Quantum Fluids
Fully Suspended Nano-beams for Quantum Fluids Open
View article: Superconducting aluminum heat switch with 3 n<b>Ω</b> equivalent resistance
Superconducting aluminum heat switch with 3 n<b>Ω</b> equivalent resistance Open
Superconducting heat switches with extremely low normal state resistances are needed for constructing continuous nuclear demagnetization refrigerators with high cooling power. Aluminum is a suitable superconductor for the heat switch becau…
View article: Microwave Optomechanically Induced Transparency and Absorption Between 250 and 450 mK
Microwave Optomechanically Induced Transparency and Absorption Between 250 and 450 mK Open
View article: A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling
A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling Open
View article: Microwave optomechanical measurement of non-metallized SiN strings at mK temperatures
Microwave optomechanical measurement of non-metallized SiN strings at mK temperatures Open
The mechanical properties of amorphous materials (glasses) at low temperatures are dominated by effects of low energy excitations that are thought to be atomic-scale tunneling two level systems (TTLS). In nanometer-scale glass samples, the…
View article: Silicon nitride drum resonators with a top-gate capacitive coupling scheme
Silicon nitride drum resonators with a top-gate capacitive coupling scheme Open
International audience
View article: High-<i>Q</i> Silicon Nitride Drum Resonators Strongly Coupled to Gates
High-<i>Q</i> Silicon Nitride Drum Resonators Strongly Coupled to Gates Open
Silicon nitride (SiN) mechanical resonators with high quality mechanical properties are attractive for fundamental research and applications. However, it is challenging to maintain these mechanical properties while achieving strong couplin…
View article: Microwave single-tone optomechanics in the classical regime
Microwave single-tone optomechanics in the classical regime Open
We report on the quantitative experimental illustration of elementary optomechanics within the classical regime. All measurements are performed in a commercial dilution refrigerator on a mesoscopic drumhead aluminium resonator strongly cou…
View article: Microwave Optomechanically Induced Transparency and Absorption
Microwave Optomechanically Induced Transparency and Absorption Open
High-quality microwave amplifiers and notch-filters can be made from microwave optomechanical systems in which a mechanical resonator is coupled to a microwave cavity by radiation pressure. These amplifiers and filters rely on optomechanic…
View article: A macroscopic object passively cooled into its quantum ground state of motion
A macroscopic object passively cooled into its quantum ground state of motion Open
The building blocks of Nature, namely atoms and elementary particles, are described by quantum mechanics. This fundamental theory is the ground on which physicists have built their major mathematical models [1]. Today, the unique features …
View article: Microwave optomechanics in the classical regime
Microwave optomechanics in the classical regime Open
We report on the quantitative experimental illustration of elementary optomechanics within the classical regime. All measurements are performed in a commercial dilution refrigerator on a mesoscopic drumhead aluminium resonator strongly cou…
View article: Nanomechanical damping via electron-assisted relaxation of two-level\n systems
Nanomechanical damping via electron-assisted relaxation of two-level\n systems Open
We report on measurements of dissipation and frequency noise at millikelvin\ntemperatures of nanomechanical devices covered with aluminum. A clear excess\ndamping is observed after switching the metallic layer from superconducting to\nthe …
View article: Geometrical nonlinearity of circular plates and membranes: An alternative method
Geometrical nonlinearity of circular plates and membranes: An alternative method Open
We apply the well-established theoretical method developed for geometrical nonlinearities of micro-/nano-mechanical clamped beams to circular drums. The calculation is performed under the same hypotheses, the extra difficulty being to anal…
View article: A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free dilution refrigerators
A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free dilution refrigerators Open
View article: Design evaluation of serial and parallel sub-mK continuous nuclear demagnetization refrigerators
Design evaluation of serial and parallel sub-mK continuous nuclear demagnetization refrigerators Open
View article: Characterization of electromechanically induced absorption and transparency in microwave optomechanical device
Characterization of electromechanically induced absorption and transparency in microwave optomechanical device Open
Microwave optomechanical circuitry is attractive for both fundamental research and quantum engineering as it gives microwave photons an ability to interact with mechanical phonons through radiation pressure [1]. In this scheme, a mechanica…
View article: A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free dilution refrigerators
A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free dilution refrigerators Open
Cryogen-free dilution refrigerators generally simplify low temperature research but some types of samples, including superconducting qubits and other nanoelectronic devices, are affected by environmental heat sources such as stray photons …
View article: A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free\n dilution refrigerators
A 10 mK hermetic cell for eliminating parasitic heating in cryogen-free\n dilution refrigerators Open
Cryogen-free dilution refrigerators generally simplify low temperature\nresearch but some types of samples, including superconducting qubits and other\nnanoelectronic devices, are affected by environmental heat sources such as\nstray photo…