Closed Strings as Imaginary D-branes Export

@article{citeulike:5455060, abstract = {Sen has recently drawn attention to an exact time-dependent Boundary Conformal Field Theory with the space-time interpretation of brane creation and annihilation. An interesting limit of this BCFT is formally equivalent to an array of D-branes located in imaginary time. This raises the question: what is the meaning of D-branes in imaginary time? The answer we propose is that D-branes in imaginary time define purely closed string backgrounds. In particular we prove that the disk scattering amplitude of m closed strings off an arbitrary configuration of imaginary branes is equivalent to a sphere amplitude with m+1 closed string insertions. The extra puncture is a specific closed string state, generically normalizable, that depends on the details of the brane configuration. We study in some detail the special case of the array of imaginary D-branes related to Sen's BCFT and comment on its space-time interpretation. We point out that a certain limit of our set-up allows to study classical black hole creation and suggests a relation between Choptuik's critical behavior and a phase-transition a` la Gregory-Laflamme. We speculate that open string field theory on imaginary D-branes is dual to string theory on the corresponding closed string background.}, archivePrefix = {arXiv}, author = {Gaiotto, Davide and Itzhaki, Nissan and Rastelli, Leonardo}, citeulike-article-id = {5455060}, citeulike-linkout-0 = {http://arxiv.org/abs/hep-th/0304192}, citeulike-linkout-1 = {http://arxiv.org/pdf/hep-th/0304192}, citeulike-linkout-2 = {http://dx.doi.org/10.1016/j.nuclphysb.2004.03.017}, day = {26}, doi = {10.1016/j.nuclphysb.2004.03.017}, eprint = {hep-th/0304192}, keywords = {boundary-states, cft, d-branes}, month = {Jan}, posted-at = {2009-08-17 22:44:12}, priority = {2}, title = {Closed Strings as Imaginary D-branes}, url = {http://dx.doi.org/10.1016/j.nuclphysb.2004.03.017}, year = {2004} }

TY - JOUR ID - citeulike:5455060 L3 - citeulike-article-id:5455060 N2 - Sen has recently drawn attention to an exact time-dependent Boundary Conformal Field Theory with the space-time interpretation of brane creation and annihilation. An interesting limit of this BCFT is formally equivalent to an array of D-branes located in imaginary time. This raises the question: what is the meaning of D-branes in imaginary time? The answer we propose is that D-branes in imaginary time define purely closed string backgrounds. In particular we prove that the disk scattering amplitude of m closed strings off an arbitrary configuration of imaginary branes is equivalent to a sphere amplitude with m+1 closed string insertions. The extra puncture is a specific closed string state, generically normalizable, that depends on the details of the brane configuration. We study in some detail the special case of the array of imaginary D-branes related to Sen's BCFT and comment on its space-time interpretation. We point out that a certain limit of our set-up allows to study classical black hole creation and suggests a relation between Choptuik's critical behavior and a phase-transition a` la Gregory-Laflamme. We speculate that open string field theory on imaginary D-branes is dual to string theory on the corresponding closed string background. TI - Closed Strings as Imaginary D-branes KW - boundary-states KW - cft KW - d-branes AU - Gaiotto, Davide AU - Itzhaki, Nissan AU - Rastelli, Leonardo PY - 2004/Jan/26/ UR - http://dx.doi.org/10.1016/j.nuclphysb.2004.03.017 ER -