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High-Q magnetic levitation and control of superconducting microspheres at millikelvin temperatures
Joachim Hofer, Rudolf Gross, Gerard Higgins +11
We report the levitation of a superconducting lead-tin sphere with 100 micrometer diameter (corresponding to a mass of 5.6 micrograms) in a static magnetic trap formed by two coils…
Dissipative phase transitions in optomechanical systems
Fatemeh Bibak, Uroš Delić, Markus Aspelmeyer +1
We show that optomechanical quantum systems can undergo dissipative phase transitions within the limit of small nonlinear interaction and strong external drive. In such a defined t…
Fast Quantum Interference of a Nanoparticle via Optical Potential Control
Lukas Neumeier, Mario A. Ciampini, Oriol Romero-Isart +2
We introduce and theoretically analyze a scheme to prepare and detect non-Gaussian quantum states of an optically levitated particle via the interaction with a light pulse that gen…
Force-Gradient Sensing and Entanglement via Feedback Cooling of Interacting Nanoparticles
Henning Rudolph, Uroš Delić, Markus Aspelmeyer +2
We show theoretically that feedback-cooling of two levitated, interacting nanoparticles enables differential sensing of forces and the observation of stationary entanglement. The f…
How to avoid the appearance of a classical world in gravity experiments
Markus Aspelmeyer
Quantum states of gravitational source masses can lead to experimental outcomes that are inconsistent with the predictions of a purely classical field theory of gravity. Environmen…
Squeezed light from a levitated nanoparticle at room temperature
Lorenzo Magrini, Victor A. Camarena-Chávez, Constanze Bach +2
Quantum measurements of mechanical systems can produce optical squeezing via ponderomotive forces. Its observation requires high environmental isolation and efficient detection, ty…