ELFT HÍRADÓ

[Balog Janos <balog.janos AT wigner.mta.hu>]

MTA Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                   Vecsernyés Péter
                     (Wigner RMI)

  "An effective toy model in Mn(C) for selective measurements in
             quantum mechanics"


             címmel tartandó szemináriumára.

Kivonat:

The non-selective and selective measurements of a self-adjoint 
observable $M$ in quantum mechanics are interpreted as `jumps' of the 
state of the measured system into a decohered or pure state, 
respectively, characterized by the spectral projections of $M$. However, 
one may try to describe the measurement results as asymptotic states of 
a dynamical process, where the non-unitarity of time evolution arises as 
an effective description of the interaction of the measured system with 
the measuring device.
The dynamics we present is a two-step dynamics: the first step is the 
non-selective measurement of $M$ or $M$-decoherence, which is known to 
be described by the linear, deterministic Lindblad equation. The second 
step is a process from the resulted $M$-decohered state to an $M$-pure 
state, which is described by an effective non-linear `randomly chosen' 
toy model dynamics: the pure states arise as asymptotic fixed points, 
and their emergent probabilities are the relative volumes of their 
attractor regions.


Helye: MTA Wigner FK RMI III.ép. Tanácsterem
Ideje: 2017 szeptember 1  péntek du. 14:00 óra



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                                            Balog János