Quantum measurements without macroscopic superpositions (2007)
Spehner, Dominique, Haake, Fritz
We study a class of quantum measurement models. A microscopic object is entangled with a macroscopic pointer such that each eigenvalue of the measured object observable is tied up with a specific...
Turek, Marko, Spehner, Dominique, Müller, Sebastian, Richter, Klaus
We present a semiclassical calculation of the generalized form factor which characterizes the fluctuations of matrix elements of the quantum operators in the eigenbasis of the Hamiltonian of a...
Spectral form factor of hyperbolic systems: leading off-diagonal approximation (2003)
The spectral fluctuations of a quantum Hamiltonian system with time-reversal symmetry are studied in the semiclassical limit by using periodic-orbit theory. It is found that, if long periodic orbits...