The main research objective of our group is to investigate quantum effects of nano- and microscale systems and their implications for the foundations and applications of quantum physics. Our goal is to gain access to a completely new parameter regime for experimental physics with respect to both size and complexity.


Petition "Wissenschaft ist Zukunft" ├╝bergeben

Im Zuge eines Gesprächstermins bei Staatssekretär Jochen Danninger wurden die mehr als 50.000 Unterstützungserklärungen der Petition "Wissenschaft ist Zukunft" im Finanzministerium an die Politik übergeben.



Bringing bonded mirrors out of the laboratory and into the light

Quantum physicists at the University of Vienna present yet another example that fundamental research can create unexpected technological innovations. The start-up “Crystalline Mirror Solutions,” or CMS, is focused on the manufacturing of high-performance mirrors for optical precision measurement.


Cooling by measurement

Observing a physical quantity without disturbing it is a key capability for the control of individual quantum systems. Such back-action-evading or quantum non-demolition measurements were first introduced in the 1970s for gravitational wave detection, and now such techniques are an indispensable tool throughout quantum science.

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Cavity cooling of levitated nanoparticles

The coupling of a levitated massive particle and an optical cavity field promises access to a unique parameter regime both for macroscopic quantum experiments and for high-precision force sensing. We report a demonstration of such controlled interactions by cavity cooling the center-of-mass motion of an optically trapped submicron particle. This paves the way for a light–matter interface that can enable room-temperature quantum experiments with mesoscopic mechanical systems.


Production of Squeezed Light Using a Silicon Micromechanical System

One of the many counterintuitive and bizarre insights of quantum mechanics is that even in a vacuum - what many of us think of as an empty void - all is not completely still. Low levels of noise, known as quantum fluctuations, are always present. Always, that is, unless you can pull off a quantum trick. And that's just what a team led by researchers at the California Institute of Technology (Caltech), in collaboration with Prof. Markus Aspelmeyer, has done. The group has engineered a miniature silicon system that produces a type of light that is quieter at certain frequencies - meaning it has fewer quantum fluctuations - than what is usually present in a vacuum.

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Latest publications 


Silicon optomechanical crystal resonator at millikelvin temperatures

S. M. Meenehan, J. D. Cohen, S. Gröblacher, J. T. Hill, A. H. Safavi-Naeini, M. Aspelmeyer, and O. Painter

Phys. Rev. A 90, 011803(R), (2014)


Tensile strained InxGa1-xP membranes for cavity optomechanics

G. D. Cole, P.-L. Yu, C. Gärtner, K. Siquans, R. Moghadas Nia, J. Schmöle, J. Hoelscher-Obermaier, T. P. Purdy, W. Wieczorek, C. A. Regal, M. Aspelmeyer

Appl. Phys. Lett. 104, 201908 (2014)


Reduction of residual amplitude modulation to 1×10-6 for frequency-modulation and cavity-based laser stabilization

W. Zhang, M. J. Martin, C. Benko, J. L. Hall, J. Ye, C. Hagemann, T. Legero, U. Sterr, F. Riehle, G. D. Cole, M. Aspelmeyer

Optics Letters, vol. 39, no. 7, pp. 1980-1983, 2014


Macroscopic optomechanics from displaced single-photon entanglement

P.Sekatski, M.Aspelmeyer, N.Sangouard

Physical Review Letters 112, 080502 (2014)


How cold can you get in space? Quantum Physics at cryogenic temperatures in space

G.Hechenblaikner, F.Hufgard, J.Burkhardt, N.Kiesel, U.Johann, M.Aspelmeyer, R.Kaltenbaek

New Journal of Physics, Vol. 16, 013058 (2014)


Time-Continuous Bell Measurements

S.Hofer, D. Vasilyev, M. Aspelmeyer, K. Hammerer

Phys. Rev. Lett. 111, 170404 (2013)


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