The Schr dinger wave functional and S-branes

Abstract

In this paper we will consider the minisuperspace approach to S-branes dynamics in the Schrödinger picture description. Time-evolution of vacuum wave functional for quantum field theory on S-brane is studied. Open string pair production is calculated. The analysis of density matrix for mixed states is also performed. * On leave from Masaryk University, Brno

The Schrödinger Wave Functional and Closed String Rolling Tachyon

“…In the completely the same way as in [44] we obtain that the density of the number of particle created with momentum k is equal to…”

“…We would like to calculate the vacuum expectation value of N(k, t) . The calculation of N(k, t) is completely the same as in case of S-brane dynamics [44] where it was shown that…”

“…As companion to this approach we apply Schrödinger picture description of the quantum field theory defined by (2.3). The similar approach was recently used for minisuperspace description of S-branes in [44] 4 .…”

“…As in [42] we would like to determine the rate of the particle production in the rolling tachyon background. In the same way as in [44] we introduce an operator of number of particles with momentum k…”

Note on D-brane effective action in the linear dilaton background

“…The study of time-dependent open string tachyons [1,2,3,4,5,6,7] was very intensive in recent two years and also leads to the discovery of new dualities and reinterpretation some old ones, especially relation between two dimensional string theories and matrix models [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,26,35].…”