2,385 research outputs found
Single-photon-triggered quantum chaos
We demonstrate how to manipulate quantum chaos with a single photon in a
hybrid quantum device combining cavity QED and optomechanics. Specifically, we
show that this system changes between integrable and chaotic relying on the
photon-state of the injected field. This onset of chaos originates from the
photon-dependent chaotic threshold of the qubit-field coupling induced by the
optomechanical interaction. By deriving the Loschmidt Echo we observe clear
differences in the sensitivity to perturbations in the regular versus chaotic
regimes. We also present classical analog of this chaotic behavior, and find
good correspondence between chaotic quantum dynamics and classical physics. Our
work opens up a new route to achieve quantum manipulations, which are crucial
elements in engineering new types of on-chip quantum devices and quantum
information science.Comment: 11 pages, 4 figure
The Effects of Scraping Therapy on Local Temperature and Blood Perfusion Volume in Healthy Subjects
Objective. We aim to study the therapeutic effects of scraping by investigating the changes of temperature and local blood perfusion volume in healthy subjects after scraping stimulation, and to explore the mechanism of scraping stimulation from the points of microcirculation and energy metabolism. Methods. Twenty-three health subjects were included in this study. Local blood perfusion volume and body surface temperature was detected at 5 min before scraping stimulation, 0, 15, 30, 60 and 90 min after scraping using Laser Doppler imager and infrared thermograph. Results. Significant increase was noted in the blood perfusion volume in the scraping area within 90 minutes compared to the baseline level and non-scraping area (P < 0.001). Compared with non-scraping area, an increase of body temperature with an average of 1°C was observed after scraping stimulation (P < 0.01). Conclusion. Scraping can significantly improve the blood perfusion volume and increase the temperature in the scraping area, promoting the local blood circulation and energy metabolism
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