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math-ph2023
Thermal time as an unsharp observable
Jan van Neerven, Pierre Portal
We show that the Connes-Rovelli thermal time associated with the quantum harmonic oscillator can be described as an (unsharp) observable, that is, as a positive operator valued mea…
math-ph2005★ 2 cited
Second quantization and the L^p-spectrum of nonsymmetric Ornstein-Uhlenbeck operators
Jan van Neerven
The spectra of the second quantization and the symmetric second quantization of a strict Hilbert space contraction are computed explicitly and shown to coincide. As an application,…