Observation of non-Markovian micromechanical Brownian motion

Autor(en)

Simon Gröblacher, A. Trubarov, N. Prigge, G. D. Cole, M. Aspelmeyer, J. Eisert

Abstrakt

All physical systems are to some extent open and interacting with their environment. This insight, basic as it may seem, gives rise to the necessity of protecting quantum systems from decoherence in quantum technologies and is at the heart of the emergence of classical properties in quantum physics. The precise decoherence mechanisms, however, are often unknown for a given system. In this work, we make use of an opto-mechanical resonator to obtain key information about spectral densities of its condensed-matter heat bath. In sharp contrast to what is commonly assumed in high-temperature quantum Brownian motion describing the dynamics of the mechanical degree of freedom, based on a statistical analysis of the emitted light, it is shown that this spectral density is highly non-Ohmic, reflected by non-Markovian dynamics, which we quantify. We conclude by elaborating on further applications of opto-mechanical systems in open system identification.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Freie Universität Berlin (FU), Delft University of Technology

Journal

Nature Communications

Band

6

Anzahl der Seiten

6

ISSN

2041-1723

Publikationsdatum

07-2015

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

ASJC Scopus Sachgebiete

General, Allgemeine Physik und Astronomie, Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/87189d38-9c28-481a-8294-f1f9f190c569