Portal de Periódicos da CAPES

Squeezing of Quantum Noise of Motion in a Micromechanical Resonator

2015; American Physical Society; Volume: 115; Issue: 24 Linguagem: Inglês

10.1103/physrevlett.115.243601

1092-0145

J.-M. Pirkkalainen, Erno Damskägg, M. Brandt, Francesco Massel, Mika A. Sillanpää,

Advanced MEMS and NEMS Technologies

A pair of conjugate observables, such as the quadrature amplitudes of harmonic motion, have fundamental fluctuations that are bound by the Heisenberg uncertainty relation. However, in a squeezed quantum state, fluctuations of a quantity can be reduced below the standard quantum limit, at the cost of increased fluctuations of the conjugate variable. Here we prepare a nearly macroscopic moving body, realized as a micromechanical resonator, in a squeezed quantum state. We obtain squeezing of one quadrature amplitude 1.1±0.4 dB below the standard quantum limit, thus achieving a long-standing goal of obtaining motional squeezing in a macroscopic object.