Decoding multiway gravitational junctions in AdS in terms of holographic quantum maps
6 affiliations
- 1Universidad Andres Bello
- 2Instituto Balseiro, Centro Atómico Bariloche
- 3School of Physics and Mandelstam Institute for Theoretical Physics, University of the Witwatersrand
- 4Universidad Técnica Federico Santa María
- 5Pontificia Universidad Católica de Valparaíso
- 6Université PSL, CNRS, Sorbonne Université, Université de Paris
Abstract
A bstract : It has been shown that multiway junctions gluing n copies of locally AdS ₃ spacetimes ( n ≥ 2) can be described by n − 1 strings obeying non-linear Nambu-Goto equations coupled by Monge-Ampère like terms. Here we study how such junctions along with their stringy degrees of freedom can be interpreted in terms of an interface between n identical holographic conformal theories each defined on a semi-infinite line (wire). We study the gravitational scattering problem at the multiway junction, and show that at the linearized order the dual interfaces correspond to quantum maps which factorize into a product of a scattering matrix determined only by the tension of the dual junction and relative automorphisms of the Virasoro algebra governed by the n − 1 stringy modes. Both of these are universal in the sense that they are independent of linear modifications of the background state. These generalize earlier results for the 2-way junctions implying that the dual interface is a tunable energy transmitter. We comment on understanding the quantum map corresponding to the full non-linear gravitational problem, and study Ward identities and unitarity bounds.
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BibTeX
@article{chakraborty2026decoding,
title = {{Decoding multiway gravitational junctions in AdS in terms of holographic quantum maps}},
author = {Avik Chakraborty and Tanay Kibe and Martín Molina and Ayan Mukhopadhyay and Giuseppe Policastro},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)136},
eprint = {2604.07463},
archivePrefix = {arXiv},
url = {https://link.springer.com/10.1007/JHEP10(2026)136},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Decoding multiway gravitational junctions in AdS in terms of holographic quantum maps
AU - Avik Chakraborty
AU - Tanay Kibe
AU - Martín Molina
AU - Ayan Mukhopadhyay
AU - Giuseppe Policastro
PY - 2026
DA - 2026/10/12
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)136
UR - https://link.springer.com/10.1007/JHEP10(2026)136
AB - A bstract : It has been shown that multiway junctions gluing n copies of locally AdS ₃ spacetimes ( n ≥ 2) can be described by n − 1 strings obeying non-linear Nambu-Goto equations coupled by Monge-Ampère like terms. Here we study how such junctions along with their stringy degrees of freedom can be interpreted in terms of an interface between n identical holographic conformal theories each defined on a semi-infinite line (wire). We study the gravitational scattering problem at the multiway junction, and show that at the linearized order the dual interfaces correspond to quantum maps which factorize into a product of a scattering matrix determined only by the tension of the dual junction and relative automorphisms of the Virasoro algebra governed by the n − 1 stringy modes. Both of these are universal in the sense that they are independent of linear modifications of the background state. These generalize earlier results for the 2-way junctions implying that the dual interface is a tunable energy transmitter. We comment on understanding the quantum map corresponding to the full non-linear gravitational problem, and study Ward identities and unitarity bounds.
SN - 1029-8479
SN - 1126-6708
ER -