Quantum correlations from a room-temperature optomechanical cavity Article Swipe
Related Concepts
Quantum
Physics
Thermometer
Action (physics)
Quantum fluctuation
Quantum mechanics
Thermal fluctuations
Thomas Purdy
,
Karen E. Grutter
,
Kartik Srinivasan
,
Jacob M. Taylor
·
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.1126/science.aag1407
· OA: W2701137507
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.1126/science.aag1407
· OA: W2701137507
Quantum effects in ambient conditions Quantum back action—the “reaction” of a quantum mechanical object to being measured—is normally observed at cryogenic temperatures, where it is easier to distinguish from thermal motion. Purdy et al. managed to tease out the effects of quantum back action at room temperature by using a mechanical oscillator and probing it with light (see the Perspective by Harris). The fluctuations of the force produced by the light probe caused correlated changes to the motion of the oscillator and the properties of the transmitted light. These correlations revealed the effects of the back action, which allows the system to be used as a quantum thermometer. Science , this issue p. 1265 ; see also p. 1232
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