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Holographic Dual of PT Symmetric BCFT
Ryota Maeda, Nanami Nakamura, Tadashi Takayanagi·June 17, 2026
hep-thcond-mat.stat-mechQuantum Physics
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Abstract
We present a holographic dual of a two dimensional conformal field theory with non-hermitian but Parity-Time (PT) symmetric boundary conditions, by applying the AdS/BCFT duality and by introducing an imaginary valued scalar field localized on an end-of-the-world brane. We find that as we increase the strength of the non-hermitian PT symmetric interactions, the system experiences a spontaneous PT symmetry breaking. We also consider its Wick rotated setup as a new quantum quenched state and show that its growth of entanglement entropy can be larger than the standard results obtained from standard Cardy states.