Feedback cooling of currents
نویسندگان
چکیده
منابع مشابه
Thermodynamics of Quantum Feedback Cooling
The ability to initialize quantum registers in pure states lies at the core of many applications of quantum technologies, from sensing to quantum information processing and computation. In this paper, we tackle the problem of increasing the polarization bias of an ensemble of two-level register spins by means of joint coherent manipulations, involving a second ensemble of ancillary spins and en...
متن کاملFeedback cooling of a nanomechanical resonator
Asa Hopkins, Kurt Jacobs, Salman Habib, and Keith Schwab T-8, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125, USA Laboratory for Physical Sciences, College Park, Maryland 20740, USA ~Received 25 February 2003; revised manuscript received 2 July 2003;...
متن کاملFeedback cooling of a one-electron oscillator.
A 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...
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We put forward an alternative view to the Bondi–driven feedback between heating and cooling of the intra-cluster medium (ICM) in cooling flow (CF) galaxies and clusters. We adopt the popular view that the heating is due to an active galactic nucleus (AGN), i.e. a central black hole accreting mass and launching jets and/or winds. We propose that the feedback occurs with the entire cool inner reg...
متن کاملFeedback cooling of a cantilever's fundamental mode below 5 mK.
We cool the fundamental mechanical mode of an ultrasoft silicon cantilever from a base temperature of 2.2 K down to 2.9+/-0.3 mK using active optomechanical feedback. The lowest observed mode temperature is consistent with limits determined by the properties of the cantilever and by the measurement noise. For high feedback gain, the driven cantilever motion is found to suppress or "squash" the ...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/337597a0