106 citations · 358 across the 8 of their papers we have counts for
8 papers
Complete nonclassicality test with a photon-number resolving detector
T. Kiesel, W. Vogel
We present a method for the experimental measurement of nonclassicality witnesses and demonstrate its application. Our proposal only requires the coherent displacement of the initi…
Universal nonclassicality witnesses for harmonic oscillators
T. Kiesel, W. Vogel
It is shown that a nonclassicality witness, whose expectation value can be measured for all quantum states, can be constructed from every nonclassicality filter. This finding leads…
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…
Nonclassicality Quasiprobability of Single-Photon Added Thermal States
T. Kiesel, W. Vogel, M. Bellini +1
We report the experimental reconstruction of a nonclassicality quasiprobability for a single-photon added thermal state. This quantity has significant negativities, which is necess…
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…
Nonclassicality filters and quasiprobabilities
T. Kiesel, W. Vogel
Necessary and sufficient conditions for the nonclassicality of bosonic quantum states are formulated by introducing nonclassicality filters and nonclassicality quasiprobability dis…