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LOOP SPACE HAMILTONIAN FOR $c \le 1$ OPEN STRINGS

We construct a string field Hamiltonian describing the dynamics of open and closed strings with effective target-space dimension $c\le 1 $. In order to do so, we first derive the Dyson-Schwinger equations for the underlying large $N$ vector+matrix model and formulate them as a set of constraints satisfying decoupled Virasoro and U(1) current algebras. The Hamiltonian consists of a bulk and a boundary term having different scaling dimensions. The time parameters corresponding to the two terms are interpreted from the the point of view of the fractal geometry of the world surface.

preprint1995arXivOpen access
Ivan K. Kostov
hep-th
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Ivan K. Kostov

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