Robert Jonsson

Literatur 1: Das Vakuum kommt zu Kräften: Der Casimir-Effekt, Physik in unserer Zeit 36 (2005) 2, 85. 2: On the attraction between two perfectly conducting plates, Proc. Kon. Ned. Akad. Wetenschap 51 (1948) 7, 793. 3: Measurements of attractive forces between flat plates, Physica 24 (1958) 751. 4: Demonstration of the Casimir Force in the 0.6 to 6 μm Range, Phys. Rev. Lett. 78 (1997) 5. 5, : Precision Measurement of the Casimir Force from 0.1 to 0.9 μm, Phys. Rev. Lett. 81 (1998) 4549.

A black hole evaporates by Hawking radiation. Each mode of that radiation is thermal. If the total state is nevertheless to be pure, modes must be entangled. Estimating the minimum size of this entanglement has been an important outstanding issue. We develop a new theory of constrained random symplectic transformations, based on the assumptions that the total state is pure and Gaussian with given marginals.

Abstract An important feature of Schwarzschild spacetime is the presence of orbiting null geodesics and caustics. Their presence implies strong gravitational lensing effects for matter and radiation, i.e., for excitations of quantum fields. Here, we raise the question whether the lensing manifests itself also in the vacuum of quantum fields, namely by lensing the distribution of vacuum entanglement.