Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 2: Optomechanics
Q 2.4: Talk
Monday, March 9, 2020, 11:45–12:00, a310
Quantum States of Acoustic Modes in Optomechanical System — •Daniel Reiche1,2, Kurt Busch1,2, and Ryan O. Behunin3 — 1Humboldt-Universit\"at zu Berlin, Institut f\"ur Physik, AG Theoretische Optik \& Photonik, Newtonstr. 15, 12489 Berlin, Germany — 2Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2A, 12489 Berlin, Germany — 3Department of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ 86011, USA
Photons exchanging momentum with matter for the price of creating phonons is a remarkable feature of the interface between quantum electrodynamics and solid state physics. Under certain conditions, the decay length of the acoustic mode can become much larger than the physical dimensions of the material and the phonon exists over a surprisingly large period of time. This provides an intriguing playground for exploring and manipulating the phonon's quantum state.
In this context, we analyze the quantum properties of phonons excited in a medium due to the interaction with a coherent cavity field. For negligible dissipation, we solve the time evolution of an initially coherent state exactly and can demonstrate the existence of non-classicality.