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

There are three general methods that can be used to determine formation velocities from full waveform logs. The first approach is to make use of the data from the entire waveform. This type of velocity analysis is performed either in the frequency domain (I.e. f-k analysis or the two station method) or in the time domain (I.e. velocity spectral analysis). The second approach is to identify the ...

Applications of discretized light-cone quantization (DLCQ) to (3+1)-dimensional Yukawa theory with Pauli– Villars regulators and of supersymmetric DLCQ (SDLCQ) to (2+1)-dimensional super Yang–Mills theory are discussed. The ability of these methods to provide wave functions as well as spectra is emphasized.