VALLEYS IN NONCRITICAL STRING FOAM SUPPRESS QUANTUM COHERENCE
1995 ◽
Vol 10
(05)
◽
pp. 425-440
◽
Keyword(s):
As an example of our noncritical string approach to microscopic black hole dynamics, we exhibit some string contributions to the [Formula: see text] matrix relating in- and out-state density matrices that do not factorize as a product of S and S† matrices. They are associated with valley trajectories between topological defects on the string worldsheet, that appear as quantum fluctuations in the space-time foam. Through their uv renormalization scale dependences these valleys cause non-Hamiltonian time evolution and suppress off-diagonal entries in the density matrix at large times. Our approach is a realization of previous formulations of nonequilibrium quantum statistical mechanics with an arrow of time.
1993 ◽
Vol 70
(14)
◽
pp. 2134-2137
◽
2002 ◽
Vol 49
(2-3)
◽
pp. 279-293
◽
1972 ◽
Vol 4
(2-3)
◽
pp. 111-173
◽