Crosscap States for Orientifolds of Euclidean AdS3
Abstract
Crosscap states for orientifolds of Euclidean AdS3 are constructed. We show that our crosscap states describe the same orientifolds which were obtained by the classical analysis. The spectral density of open strings in the system with orientifold can be read from the M"obius strip amplitudes and it is compared to that of the open strings stretched between branes and their mirrors. We also compute the Klein bottle amplitudes.
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