Being in Two Places at the Same Time

David Andresen

Bernhard F. Rothenstein, Ioan Damian

A method of measuring time intervals by a single observer proposed by Crowell is extended to the more general case when the events separated by the time interval take place at two points characterized by the same y=y' space coordinates. We show that time dilation and time contraction can take place or even an inversion in the time succession can be detected

Joseph H. Friedman

Zeng Xiao-xiang

Entanglement time evolution of two atoms separately placed is examined in two loss cavities prepared in coherent states in the dispersive interaction limit.Disentanglement may take place in finite time even though coherence of the atomic subsystem never decays to zero.