Dear all,
The group meeting is in the usual time and place of HIT E 41.1 at 16:00. There will be the Masters presentation of Emilio Onorati and a talk by our visitor Vladimír Bužek. The details of his talk are below. Cheers,
Norm
On the origin of (statistical) temperature in quantum Universe
Vladimír Bužek Research Center for Quantum Information, Slovak Academy of Sciences, Bratislava
In my talk we will argue that within a non-relativistic quantum-mechanical model of a Universe (the q-Universe) the statistical temperature emerges as a consequence of quantum entanglement. In particular, I will model the q-Universe as a system of interacting spin-1/2 particles described by a specific Hamiltonian (eg Ising Hamiltonian). The q-Universe is assumed to be in a pure state of its Hamiltonian. I will show that any (almost) sub-system of the q-Universe is in a mixed state described by a density operator such that probabilities of outcomes of measurements in the energy eigen-basis of the sub-system can be very well approximated by the Boltzmann distribution.