PRL 113, 173601 (2014)
Harnessing nonlinearities strong enough to allow two single photons to interact with one another is not only a fascinating challenge but is central to numerous advanced applications in quantum information science. Currently, all known approaches are extremely challenging although a few have led to experimental realisations with attenuated classical laser light.
Physical Review Letters 112, 143602 – Published 9 April 2014
We show how to use the radiation pressure optomechanical coupling between a mechanical oscillator and an optical cavity field to generate in a heralded way a single quantum of mechanical motion (a Fock state). Starting with the oscillator close to its ground state, a laser pumping the upper motional sideband produces correlated photon-phonon pairs via optomechanical parametric down-conversion.
Phys. Rev. Lett. 112, 036402
We analyze the low energy excitations of spin lattice systems in two dimensions at zero temperature within the framework of projected entangled pair state models. Perturbations in the bulk give rise to physical excitations located at the edge.
Nature 517, 64-67 (2015)
In transport experiments the quantum nature of matter becomes directly evident when changes in conductance occur only in discrete steps, with a size determined solely by Planck's constant h. The observations of quantized steps in the electric conductance have provided important insights into the physics of mesoscopic systems and allowed for the development of quantum electronic devices. Even though quantized conductance should not rely on the presence of electric charges, it has never been observed for neutral, massive particles.
L. Steffen, Y. Salathe, M. Oppliger, P. Kurpiers, M. Baur, C. Lang, C. Eichler, G. Puebla-Hellmann, A. Fedorov and A. Wallraff.
Nature 500, 319-322 (2013)
Demonstrations of primitive information processing elements with quantum bits (qubits) have been
implemented in many systems, but the requirements for precise quantum control, along with fast classical
feed-forward (conditioning future operations on measurement results) has proved challenging.
K. Saeedi, S. Simmons, J. Z. Salvail, P. Dluhy, H. Riemann, N. V. Abrosimov, P. Becker, H.-J. Pohl, J. L. Morten and M. L. W. Thewalt
Science 342, 830-833 (2013)
W. Chen, K.M. Beck, R. Bücker, M. Gullans, M.D. Lukin, H. Tanji-Suzuki and V. Vuletić.
Science 341, 768-770 (2013).
N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzacaro, C. W. Oates and A. D. Ludlow
Science 341 1215-1218 (2013)
Atomic clocks have been instrumental in science and technology, leading to innovations such as global
positioning, advanced communications, and tests of fundamental constant variation. Timekeeping precision
at 1 part in 1018 enables new timing applications in relativistic geodesy, enhanced Earth- and space-based
navigation and telescopy, and new tests of physics beyond the standard model.
J. Aasi, et al.
Nature Photonics 7, 613–619 (2013)
A global network of observatories is seeking to directly detect gravitational waves using precision laser
interferometry. Photon shot noise, due to the quantum nature of light, imposes a fundamental limit on the
attometre-level sensitivity of the kilometre-scale Michelson interferometers deployed for this task.
A. Reiserer, S. Ritter and G. Rempe
Science 342, 1349-1351 (2013)