1,721,007 research outputs found
Three different manifestations of the quantum Zeno effect
No full textAbstract.Three different manifestations of the quantum Zeno effect are discussed, compared and shown to be physically equivalent. We look at frequent pro jective measurements, frequent unitary “kicks” and strong continuous coupling. In all these cases, the Hilbert space of the system splits into invariant “Zeno” subspaces, among which any transition is hindered
Coleman-Weinberg effect in quantum gravity
No full textThe authors describe an application of the method of the effective potential to a model theory
of gravity with independent vierbein and O (1, 3) connection. Adopting a kind of mean field
approximation, they find that a Coleman-Weinberg effects occurs: radiative corrections due
to loops of the gauge field generate an effective potential for the vierbein whose absolute
minimum corresponds to Minkowski space
- …
