Side Stepping Heisenberg’s Uncertainty Principle isn’t easy
Improving the sensitivity of measuring equipment such as LIGO’s massive laser interferometer involves attempting to ‘sidestep’ the uncertainty principle. But, new research shows, that is going to be even harder than we had believed.
Two different quantum optomechanical systems used to demonstrate novel dynamics in backaction-evading measurements. Left (yellow): silicon nanobeam supporting both an optical and a 5 GHz mechanical mode, operated in a helium-3 cryostat at 4 Kelvin and probed using a laser sent in an optical fibre. Right (purple): microwave superconducting circuit coupled to a 6 MHz mechanically-compliant capacitor, operated in a dilution refrigerator at 15 milli-Kelvin. (I. Shomroni, EPFL.)
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