Tachyon EFT near its minimum is mapped via collective field theory to a coherent-state subsector of Klein-Gordon theory, indicating quantum-level equivalence between open and closed string descriptions of unstable D-brane decay.
Minahan,Rolling the tachyon in super bsft,Journal of High Energy Physics2002 (2002) 030–030
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Mapping Tachyon effective field theory to a subsector of Klein-Gordon theory
Tachyon EFT near its minimum is mapped via collective field theory to a coherent-state subsector of Klein-Gordon theory, indicating quantum-level equivalence between open and closed string descriptions of unstable D-brane decay.