A macroscopic object passively cooled into its quantum ground state of motion: beyond single-mode cooling
arXiv:2104.09541 · doi:10.1038/s41467-021-26457-8
Abstract
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 of quantum objects have led to the advent of promising quantum technologies [2, 3]. However, the macroscopic world is manifestly classical, and the nature of the quantum-to-classical crossover remains one of the most challenging open question of Science to date. In this respect, moving objects play a specific role [4, 5]. Pioneering experiments over the last few years have begun exploring quantum behaviour of micron-sized mechanical systems,either by passively cooling single GHz modes, or by adapting laser cooling techniques developed in atomic physics to cool specific modes far below the temperature of their surroundings [6-11]. Here instead we describe a very different approach, passive cooling of a micromechanical system down to 500 microK, reducing the average number of quanta in the fundamental vibrational mode at 15 MHz to just 0.3 (with even lower values expected for higher harmonics); the challenge being to be still able to detect the motion without disturbing the system noticeably. With such an approach higher harmonics and the surrounding environment are also cooled, leading to potentially much longer mechanical coherence times, and enabling experiments questioning mechanical wave-function collapse [12], potentially from the gravitational background [13, 14], and quantum thermodynamics [15]. Beyond the average behaviour, here we also report on the fluctuations of the fundamental vibrational mode of the device in-equilibrium with the cryostat. These reveal a surprisingly complex interplay with the local environment and allow characteristics of two distinct thermodynamic baths to be probed.
arXiv commentWith S.I
References in corpus (37)
- Cavity Optomechanics
- Laser cooling of a nanomechanical oscillator into its quantum ground state
- Sideband Cooling Micromechanical Motion to the Quantum Ground State
- Introduction to Quantum Noise, Measurement and Amplification
- Models of Wave-function Collapse, Underlying Theories, and Experimental Tests
- Towards quantum superpositions of a mirror
- Quantum Thermodynamics
- Radiation-pressure cooling and optomechanical instability of a micro-mirror
- Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode
- Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
- Remote quantum entanglement between two micromechanical oscillators
- Entangled massive mechanical oscillators
- Propagating phonons coupled to an artificial atom
- Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits
- Nanomechanical motion measured with precision beyond the standard quantum limit
- GW150914: First results from the search for binary black hole coalescence with Advanced LIGO
- Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
- Phononic bandgap nano-acoustic cavity with ultralong phonon lifetime
- Tunable photonic heat transport in a quantum heat valve
- Minimization of phonon-tunneling dissipation in mechanical resonators
- Evidence for interacting two-level systems from the 1/f noise of a superconducting resonator
- Mechanically Detecting and Avoiding the Quantum Fluctuations of a Microwave Field
- Optically detecting the quantization of collective atomic motion
- Quantum-Limited Position Detection and Amplification: A Linear Response Perspective
- Large cooperativity and microkelvin cooling with a three-dimensional optomechanical cavity
- High-Q Nanomechanics via Destructive Interference of Elastic Waves
- Probing the quantum coherence of a nanomechanical resonator using a superconducting qubit: I. Echo scheme
- Environmental Decoherence versus Intrinsic Decoherence
- Evidence of universality in the dynamical response of micromechanical diamond resonators at millikelvin temperatures
- Two-Level System Damping in a Quasi-One-Dimensional Optomechanical Resonator
- On-chip thermometry for microwave optomechanics implemented in a nuclear demagnetization cryostat
- Non-linear Frequency Transduction of Nano-mechanical Brownian Motion
- Nanoscale Quantum Calorimetry with Electronic Temperature Fluctuations
- Measuring frequency fluctuations in nonlinear nanomechanical resonators
- Beyond linear coupling in microwave optomechanics
- Evidence for the role of normal-state electrons in nanoelectromechanical damping mechanisms at very low temperatures
- Spectral effects of dispersive mode coupling in driven mesoscopic systems
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- Simultaneous ground-state cooling of two mechanical modes of a levitated nanoparticle
- Mesoscopic physics of nanomechanical systems
- Quantum gravitational decoherence from fluctuating minimal length and deformation parameter at the Planck scale
- Analogue black-white hole solitons in travelling wave parametric amplifiers with superconducting nonlinear asymmetric inductive elements
- Thermal transport in nanoelectronic devices cooled by on-chip magnetic refrigeration
- Magnetic cooling and vibration isolation of a sub-kHz mechanical resonator
- Can the displacemon device test objective collapse models?
- A Novel Architecture for room temperature microwave optomechanical experiments
- Construction of Continuous Magnetic Cooling Apparatus with Zinc Soldered PrNi Nuclear Stages
- On the link between mechanics and thermal properties: mechanothermics