Scientific Results

Probing deformed commutators with macroscopic harmonic oscillators

Year: 2015

Authors: Bawaj M., Biancofiore C., Bonaldi M., Bonfigli F., Borrielli A., Di Giuseppe G., Marconi L., Marino F., Natali R., Pontin A., Prodi G.A., Serra E., Vitali D., Marin F.

Autors Affiliation: Physics Division, School of Science and Technology, University of Camerino, via Madonna delle Carceri 9, Camerino (MC) I-62032, Italy;
INFN, Sezione di Perugia, Via A. Pascoli, Perugia I-06123, Italy;
Nanoscience-Trento-FBK Division, Institute of Materials for Electronics and Magnetism, Povo (TN) I-38123, Italy;
Istituto Nazionale di Fisica Nucleare (INFN), Trento Institute for Fundamental Physics and Application, Povo (TN) I-38123, Italy;
Dipartimento di Fisica e Astronomia, Universita` di Firenze, Via Sansone 1, Sesto Fiorentino (FI) I-50019, Italy;
INFN, Sezione di Firenze, Via Sansone 1, Sesto Fiorentino (FI) I-50019, Italy;
CNR-Istituto Nazionale di Ottica, Largo E. Fermi 6, Firenze I-50125, Italy;
Dipartimento di Fisica, Universita` di Trento, Povo (TN) I-38123, Italy;
Centre for Materials and Microsystem, Fondazione Bruno Kessler, Povo (TN) I-38123, Italy;
Department of Microelectronics and Computer/ECTM/DIMES Technology Centre, Delft University of Technology, Feldmanweg 17, 2628 CT Delft, PO Box 5053, Delft 2600 GB, The Netherlands;
European Laboratory for Non-Linear Spectroscopy (LENS), Via Carrara 1, Sesto Fiorentino (FI) I-50019, Italy.

Abstract: A minimal observable length is a common feature of theories that aim to merge quantum physics and gravity. Quantum mechanically, this concept is associated with a nonzero minimal uncertainty in position measurements, which is encoded in deformed commutation relations. In spite of increasing theoretical interest, the subject suffers from the complete lack of dedicated experiments and bounds to the deformation parameters have just been extrapolated from indirect measurements. As recently proposed, low-energy mechanical oscillators could allow to reveal the effect of a modified commutator. Here we analyze the free evolution of high-quality factor micro-and nano-oscillators, spanning a wide range of masses around the Planck mass m(P) (approximate to 22 mu g). The direct check against a model of deformed dynamics substantially lowers the previous limits on the parameters quantifying the commutator deformation.

Journal/Review: NATURE COMMUNICATIONS

Volume: 6      Pages from: 7503-1  to: 7503-7

KeyWords: Quantum Gravity Phenomenology; Optomechanics;
DOI: 10.1038/ncomms8503

Citations: 55
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