Quantum behaviour near a spacelike boundary in the c=1 matrix model

Details Quantum behaviour near a spacelike boundary in the c=1 matrix model Quantum behaviour near a spacelike boundary in the c=1 matrix model

2007-11-19

arxiv.org/abs/0711.2680v2

Phys.Rev.D78:026003,2008

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 2 figures, minor corrections

Scientific paper

10.1103/PhysRevD.78.026003

Certain time dependent configurations in the c=1 matrix model correspond to string theory backgrounds which have spacelike boundaries and appear geodesically incomplete. We investigate quantum mechanical properties of a class of such configurations in the matrix model, in terms of fermionic eigenvalues. We describe Hamiltonian evolution of the eigenvalue density using several different time variables, some of which are infinite and some of which are finite in extent. We derive unitary transformations relating these different descriptions, and use those to calculate fermion correlators in the time dependent background. Using the chiral formalism, we write the time dependent configurations as a state in the original matrix model Hilbert space.

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