Quantum Resonators Break the Thermal Rule

A SiN resonator under localized heating. Different modes have different effective temperatures depending on the spatial overlap between the local temperature and the dissipation density of the mode. CreditResearchers discovered non-uniform temperature distributions in micro-mechanical resonators, impacting their design and performance in quantum science and precision sensing., physicists use micro-mechanical resonators, which act like tuning forks, resonating at specific frequencies.

To measure a resonator’s motion, physicists use laser beams. The resonator acts like a “moving mirror,” and the laser light that bounces off carries information about its position. When compared to light that bounces off a separate fixed mirror, an interference pattern is developed, revealing the resonator’s motion to ultra-high precision.

In many observations, the more complex the mode of the resonator, the more it’s thermal energy deviates from previous theories, which suggested the temperature for every mode was identical. Shaniv continued: “We wanted to track down the reason for that and how you can achieve the optimum design for these modes.”To dive deeper into this temperature conundrum, Shaniv and Regal created specific temperature profiles for each mode.

Source: Tech Daily Report (techdailyreport.net)

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