7 papers
Direct Sampling of Negative Quasiprobabilities of a Squeezed State
T. Kiesel, W. Vogel, B. Hage +1
Although squeezed states are nonclassical states, so far, their nonclassicality could not be demonstrated by negative quasiprobabilities. In this work we derive pattern functions f…
Entangled Qubits in a non-Gaussian Quantum State
T. Kiesel, W. Vogel, B. Hage +1
We experimentally generate and tomographically characterize a mixed, genuinely non-Gaussian bipartite continuous-variable entangled state. By testing entanglement in 22-dim…
Preparing the bound instance of quantum entanglement
J. DiGuglielmo, A. Samblowski, B. Hage +3
Among the possibly most intriguing aspects of quantum entanglement is that it comes in "free" and "bound" instances. Bound entangled states require entangled states in preparation…
Building blocks for future detectors: Silicon test masses and 1550 nm laser light
R. Schnabel, M. Britzger, F. Brückner +10
Current interferometric gravitational wave detectors use the combination of quasi-monochromatic, continuous-wave laser light at 1064 nm and fused silica test masses at room tempera…
Coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity
J. Hallam, S. Chelkowski, A. Freise +5
Diffraction gratings have been proposed as core elements in future laser-interferometric gravitational-wave detectors. In this paper, we use a steady-state technique to derive coup…
Experimental test of nonclassicality criteria
T. Kiesel, W. Vogel, B. Hage +3
We experimentally examine the nonclassical character of a class of non-Gaussian states known as phase-diffused squeezed states. These states may show no squeezing effect at all, an…