A macroscopic object passively cooled into ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling
Auteur(s) :
Cattiaux, D. [Auteur]
Ultra-basses températures [NEEL - UBT]
Golokolenov, I. [Auteur]
Ultra-basses températures [NEEL - UBT]
Kumar, S. [Auteur]
Ultra-basses températures [NEEL - UBT]
Sillanpää, M. [Auteur]
Aalto University
Mercier de Lépinay, L. [Auteur]
Aalto University
Gazizulin, R. [Auteur]
Ultra-basses températures [NEEL - UBT]
Zhou, Xin [Auteur]
Nano and Microsystems - IEMN [NAM6 - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Armour, A. [Auteur]
University of Nottingham, UK [UON]
Bourgeois, Olivier [Auteur]
Thermodynamique et biophysique des petits systèmes [NEEL - TPS]
Fefferman, A. [Auteur]
Ultra-basses températures [NEEL - UBT]
Collin, E. [Auteur]
Ultra-basses températures [NEEL - UBT]
Ultra-basses températures [NEEL - UBT]
Golokolenov, I. [Auteur]
Ultra-basses températures [NEEL - UBT]
Kumar, S. [Auteur]
Ultra-basses températures [NEEL - UBT]
Sillanpää, M. [Auteur]
Aalto University
Mercier de Lépinay, L. [Auteur]
Aalto University
Gazizulin, R. [Auteur]
Ultra-basses températures [NEEL - UBT]
Zhou, Xin [Auteur]
Nano and Microsystems - IEMN [NAM6 - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Armour, A. [Auteur]
University of Nottingham, UK [UON]
Bourgeois, Olivier [Auteur]
Thermodynamique et biophysique des petits systèmes [NEEL - TPS]
Fefferman, A. [Auteur]
Ultra-basses températures [NEEL - UBT]
Collin, E. [Auteur]
Ultra-basses températures [NEEL - UBT]
Titre de la revue :
Nature Communications
Pagination :
6182
Éditeur :
Nature Publishing Group
Date de publication :
2021-10-26
ISSN :
2041-1723
Discipline(s) HAL :
Physique [physics]/Physique [physics]/Physique Générale [physics.gen-ph]
Résumé en anglais : [en]
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. Pioneering experiments over the last few years ...
Lire la suite >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. 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 low-frequency modes far below the temperature of their surroundings. Here instead we describe a very different approach, passive cooling of a whole micromechanical system down to 500 μ K, 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, potentially from the gravitational background, and quantum thermodynamics. 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 probedLire moins >
Lire la suite >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. 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 low-frequency modes far below the temperature of their surroundings. Here instead we describe a very different approach, passive cooling of a whole micromechanical system down to 500 μ K, 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, potentially from the gravitational background, and quantum thermodynamics. 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 probedLire moins >
Langue :
Anglais
Vulgarisation :
Non
Projet Européen :
Source :
Fichiers
- https://hal.archives-ouvertes.fr/hal-03412629/document
- Accès libre
- Accéder au document
- http://arxiv.org/pdf/2104.09541
- Accès libre
- Accéder au document
- https://hal.archives-ouvertes.fr/hal-03412629/document
- Accès libre
- Accéder au document
- https://hal.archives-ouvertes.fr/hal-03412629/document
- Accès libre
- Accéder au document
- document
- Accès libre
- Accéder au document
- Ground_state_v8.pdf
- Accès libre
- Accéder au document
- 2104.09541
- Accès libre
- Accéder au document