23/10/2012, 11:00 — 12:00 — Sala P3.10, Pavilhão de Matemática
Vladimír Bužek, Slovak Academy of Sciences
On the origin of (statistical) temperature in quantum Universe
In my talk we will show 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 (e.g. the Ising Hamiltonian). The q-Universe is assumed
to be in a pure state of its Hamiltonian. Iwill 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 eigenbasis of the sub-system can be very
well approximated by the Boltzmann distribution.
![Hiperligação para a sessão link](/img/link.png)
Apoiado por: Phys-Info (IT), SQIG (IT), CeFEMA e CAMGSD, com financiamento de FCT, FEDER and EU FP7, especificamente via o Doctoral Programme in the Physics and Mathematics of Information (DP-PMI), os projectos estratégicos FCT PEst-OE/EEI/LA0008/2013 e UID/EEA/50008/2013, o projecto IT QuSim, o projecto CRUP-CPU CQVibes, a Acção de Coordenação FP7 QUTE-EUROPE (600788) e os projectos FP7 Landauer (GA 318287) e PAPETS (323901).
![Instituto de Telecomunicações Instituto de Telecomunicações](/seminars/qci/img/it.png)
![CAMGSD](/img/logo_CAMGSD_new.svg)
![FCT](/img/2017_FCT_H_cor.svg)
![7th Framework Programme](/img/7thFP_small_trans.png)