Large systems can be controllably entangled and limitlessly measured

Rachel J. Berkowitz

Two oscillating membranes demonstrate correlations forbidden by classical physics.

Vladimir S. Malinovsky

Florian Mintert, Andre R. R. Carvalho, Marek Kuś +1 more

I. Rotter

The meaning of time in an open quantum system is considered under the assumption that both, system and environment, are quantum mechanical objects. The Hamilton operator of the system is non-Hermitian. Its imaginary part is the time operator. As a rule, time and energy vary continuously when controlled by a parameter. At high level density, where many states avoid crossing, a dynamical phase transition takes place in the system under the influence of the environment. It causes a dynamical stabilization of the system what can be seen in many different experimental data. Due to this effect, time is bounded from below: the decay widths (inverse proportional to the lifetimes of the states) do not increase limitless. The dynamical stabilization is an irreversible process.

Vlatko Vedral

LI Hui-ling

Studies have shown, in the limitless space, condition F=F~+ is the necessary but insufficient condition of the operator F∧,which is corresponding to the matrix F,being a Hermitian operator.Only when F=F~+ is satisfied and the surface term is zero, the operator F∧ is a Hermitian operator.