Simple perturbatively traversable wormholes from bulk fermions
Abstract A new class of traversable wormholes was recently constructed which relies only on local bulk dynamics rather than an explicit coupling between distinct boundaries. Here we begin with a four-dimensional Weyl fermion field of any mass m propagating on a classical background defined by a Z2 q...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-11-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP11(2019)037 |
| _version_ | 1811294699858690048 |
|---|---|
| author | Donald Marolf Sean McBride |
| author_facet | Donald Marolf Sean McBride |
| author_sort | Donald Marolf |
| collection | DOAJ |
| description | Abstract A new class of traversable wormholes was recently constructed which relies only on local bulk dynamics rather than an explicit coupling between distinct boundaries. Here we begin with a four-dimensional Weyl fermion field of any mass m propagating on a classical background defined by a Z2 quotient of (rotating) BTZ × S 1. This setup allows one to compute the fermion stress-energy tensor exactly. For appropriate boundary conditions around a non-contractible curve, perturbative back-reaction at any m renders the associated wormhole traversable and suggests it can become eternally traversable at the limit where the background becomes extremal. A key technical step is the proper formulation of the method of images for fermions in curved spacetime. We find the stress- energy of spinor fields to have important kinematic differences from that of scalar fields, typically causing the sign of the integrated null stress-energy (and thus in many cases the sign of the time delay/advance) to vary around the throat of the wormhole. Similar effects may arise for higher-spin fields. |
| first_indexed | 2024-04-13T05:21:20Z |
| format | Article |
| id | doaj.art-bbb123deab904d1dba2a0eae0f1c60c9 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-13T05:21:20Z |
| publishDate | 2019-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-bbb123deab904d1dba2a0eae0f1c60c92022-12-22T03:00:45ZengSpringerOpenJournal of High Energy Physics1029-84792019-11-0120191113110.1007/JHEP11(2019)037Simple perturbatively traversable wormholes from bulk fermionsDonald Marolf0Sean McBride1Department of Physics, University of CaliforniaDepartment of Physics, University of CaliforniaAbstract A new class of traversable wormholes was recently constructed which relies only on local bulk dynamics rather than an explicit coupling between distinct boundaries. Here we begin with a four-dimensional Weyl fermion field of any mass m propagating on a classical background defined by a Z2 quotient of (rotating) BTZ × S 1. This setup allows one to compute the fermion stress-energy tensor exactly. For appropriate boundary conditions around a non-contractible curve, perturbative back-reaction at any m renders the associated wormhole traversable and suggests it can become eternally traversable at the limit where the background becomes extremal. A key technical step is the proper formulation of the method of images for fermions in curved spacetime. We find the stress- energy of spinor fields to have important kinematic differences from that of scalar fields, typically causing the sign of the integrated null stress-energy (and thus in many cases the sign of the time delay/advance) to vary around the throat of the wormhole. Similar effects may arise for higher-spin fields.http://link.springer.com/article/10.1007/JHEP11(2019)037Black HolesGauge-gravity correspondence |
| spellingShingle | Donald Marolf Sean McBride Simple perturbatively traversable wormholes from bulk fermions Journal of High Energy Physics Black Holes Gauge-gravity correspondence |
| title | Simple perturbatively traversable wormholes from bulk fermions |
| title_full | Simple perturbatively traversable wormholes from bulk fermions |
| title_fullStr | Simple perturbatively traversable wormholes from bulk fermions |
| title_full_unstemmed | Simple perturbatively traversable wormholes from bulk fermions |
| title_short | Simple perturbatively traversable wormholes from bulk fermions |
| title_sort | simple perturbatively traversable wormholes from bulk fermions |
| topic | Black Holes Gauge-gravity correspondence |
| url | http://link.springer.com/article/10.1007/JHEP11(2019)037 |
| work_keys_str_mv | AT donaldmarolf simpleperturbativelytraversablewormholesfrombulkfermions AT seanmcbride simpleperturbativelytraversablewormholesfrombulkfermions |