Feedback Cooling of a One-Electron Oscillator
2003; American Physical Society; Volume: 90; Issue: 4 Linguagem: Inglês
10.1103/physrevlett.90.043001
ISSN1092-0145
AutoresBrian D’Urso, Brian Odom, G. Gabrielse,
Tópico(s)Quantum Information and Cryptography
ResumoA one-electron oscillator is cooled from 5.2 K to 850 mK using electronic feedback. Novel quantum jump thermometry reveals a Boltzmann distribution of oscillator energies and directly measures the corresponding temperature. The ratio of electron temperature and damping rate (also directly measured) is observed to be a fluctuation-dissipation invariant, independent of feedback gain, as predicted for noiseless feedback. The sharply reduced linewidth that results from feedback cooling illustrates the likely importance for improved fundamental measurements and symmetry tests.
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