When measuring the position of a mechanical oscillator, quantum mechanics imposes a strict limit on the attainable precision: Any reduction of imprecision leads to increased quantum backaction of the measuring probe on the oscillator. This quantum limit can be circumvented, in principle allowing to indefinitely reduce imprecision, by monitoring only a single quadrature of the oscillator. Such backaction-evading measurement has been recently demonstrated in electromechanical oscillators coupled to microwave resonant circuits. Here we demonstrate this technique in a photonic crystal nanomechanical oscillator, cryogenically and optomechanically cooled to a few quanta.
|Original language||American English|
|Title of host publication||International Conference on Optical MEMS and Nanophotonics, OMN 2018 - Proceedings|
|Publisher||IEEE Computer Society|
|State||Published - 4 Sep 2018|
|Event||23rd International Conference on Optical MEMS and Nanophotonics, OMN 2018 - Lausanne, Switzerland|
Duration: 29 Jul 2018 → 2 Aug 2018
|Name||International Conference on Optical MEMS and Nanophotonics|
|Conference||23rd International Conference on Optical MEMS and Nanophotonics, OMN 2018|
|Period||29/07/18 → 2/08/18|
Bibliographical noteFunding Information:
IS acknowledges support by the European Unions Horizon 2020 research and innovation programme under Marie Skołodowka-Curie IF grant agreement No. 709147 (GeNoSOS). LQ acknowledges support by Swiss National Science Foundation under grant No. 163387. TJK acknowledges financial support from an ERC AdG (QuREM). This work was supported by the SNF, the NCCR Quantum Science and Technology (QSIT), and the European Unions Horizon 2020 research and innovation programme under grant agreement No. 732894 (FET Proactive HOT). All samples were fabricated in the Center of MicroNanoTechnology (CMi) at EPFL.
© 2018 IEEE.
- backaction evasion