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Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 20: Quantum Optics III

Q 20.4: Talk

Monday, March 5, 2018, 17:00–17:15, K 0.016

Non-classical states of light with smooth P-functionFrançois Damanet1,2, •Jonas Kübler3, John Martin2, and Daniel Braun31Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom — 2Institut de Physique Nucléaire, Atomique et de Spectroscopie, CESAM, Université de Liège, Bâtiment B15, B - 4000 Liége, Belgium — 3Institut für theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany

In quantum optics, the most fundamental criterion to judge the nonclassicality of a quantum state of light is in terms of the Glauber- Sudarshan P-function. If the P-function of a state is not a valid probability density, e.g. not a positive semi-definite function, the state is considered non-classical. However, most known non-classical states have a corresponding P-function which is highly irregular. This renders working with them difficult and direct experimental reconstruction impossible.
Here we introduce a new class of non-classical states with regular smooth P-functions by "puncturing" a classical P-function with narrow negative peaks. We analytically proof their existence and determine parameter ranges where the constructed states are physical, as well as the regimes yielding anti-bunching of light. To conclude, we present some possible experimental realizations of punctured states.

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