Quantum optics seminar
Coupled oscillators listen up
Prof. Carsten Henkel
University of Potsdam
Abstract
Zoom link: https://us02web.zoom.us/j/84735878052
Abstract:
We discuss physical systems where oscillations at different frequencies are coupled. This is a very generic situation that we illustrate with a few examples, each coming with different questions. For two harmonic oscillators coupled to separate heat baths, one can generalise measures for entanglement (usually based on covariance matrices) into the frequency domain [1]. The vibrations (phonons) internal to a nano-particle can be excited and carry Welcher Weg information when such a particle is displaced by a magnetic gradient force applied to an embedded impurity spin [2]. We finally provide a listening experience to the nonlinear motion of a force microscope cantilever close to atomic contact.
[1] C. Henkel, Heat transfer and entanglement -- non-equilibrium correlation spectra of two quantum oscillators, Ann. Phys. (Berlin) 533 (2021) 2100089
[2] C. Henkel and R. Folman, Internal decoherence in nano-object interferometry due to phonons, submitted to AVS Quant. Sci. (2021)
Abstract:
We discuss physical systems where oscillations at different frequencies are coupled. This is a very generic situation that we illustrate with a few examples, each coming with different questions. For two harmonic oscillators coupled to separate heat baths, one can generalise measures for entanglement (usually based on covariance matrices) into the frequency domain [1]. The vibrations (phonons) internal to a nano-particle can be excited and carry Welcher Weg information when such a particle is displaced by a magnetic gradient force applied to an embedded impurity spin [2]. We finally provide a listening experience to the nonlinear motion of a force microscope cantilever close to atomic contact.
[1] C. Henkel, Heat transfer and entanglement -- non-equilibrium correlation spectra of two quantum oscillators, Ann. Phys. (Berlin) 533 (2021) 2100089
[2] C. Henkel and R. Folman, Internal decoherence in nano-object interferometry due to phonons, submitted to AVS Quant. Sci. (2021)