Saltatory Relaxation of the Cosmological Constant
We modify and extend an earlier proposal by Brown and Teitelboim to relax the effective cosmological term by nucleation of branes coupled to a three-index gauge potential. Microscopic considerations from string/M theory suggest two major innovations in the framework. First, the dependence of brane p...
| Hauptverfasser: | , , , |
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| Format: | Journal article |
| Sprache: | English |
| Veröffentlicht: |
2000
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| _version_ | 1826271279548727296 |
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| author | Feng, J March-Russell, J Sethi, S Wilczek, F |
| author_facet | Feng, J March-Russell, J Sethi, S Wilczek, F |
| author_sort | Feng, J |
| collection | OXFORD |
| description | We modify and extend an earlier proposal by Brown and Teitelboim to relax the effective cosmological term by nucleation of branes coupled to a three-index gauge potential. Microscopic considerations from string/M theory suggest two major innovations in the framework. First, the dependence of brane properties on the compactification of extra dimensions may generate a very small quantized unit for jumps in the effective cosmological term. Second, internal degrees of freedom for multiply coincident branes may enhance tunneling rates by exponentially large density of states factors. These new features essentially alter the relaxation dynamics. By requiring stability on the scale of the lifetime of the universe, rather than absolute stability, we derive a non-trivial relation between the supersymmetry breaking scale and the value of the cosmological term. It is plausibly, though not certainly, satisfied in Nature. |
| first_indexed | 2024-03-06T21:54:11Z |
| format | Journal article |
| id | oxford-uuid:4c54efb5-a7f8-480a-be3f-88691147c947 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:54:11Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:4c54efb5-a7f8-480a-be3f-88691147c9472022-03-26T15:48:54ZSaltatory Relaxation of the Cosmological ConstantJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4c54efb5-a7f8-480a-be3f-88691147c947EnglishSymplectic Elements at Oxford2000Feng, JMarch-Russell, JSethi, SWilczek, FWe modify and extend an earlier proposal by Brown and Teitelboim to relax the effective cosmological term by nucleation of branes coupled to a three-index gauge potential. Microscopic considerations from string/M theory suggest two major innovations in the framework. First, the dependence of brane properties on the compactification of extra dimensions may generate a very small quantized unit for jumps in the effective cosmological term. Second, internal degrees of freedom for multiply coincident branes may enhance tunneling rates by exponentially large density of states factors. These new features essentially alter the relaxation dynamics. By requiring stability on the scale of the lifetime of the universe, rather than absolute stability, we derive a non-trivial relation between the supersymmetry breaking scale and the value of the cosmological term. It is plausibly, though not certainly, satisfied in Nature. |
| spellingShingle | Feng, J March-Russell, J Sethi, S Wilczek, F Saltatory Relaxation of the Cosmological Constant |
| title | Saltatory Relaxation of the Cosmological Constant |
| title_full | Saltatory Relaxation of the Cosmological Constant |
| title_fullStr | Saltatory Relaxation of the Cosmological Constant |
| title_full_unstemmed | Saltatory Relaxation of the Cosmological Constant |
| title_short | Saltatory Relaxation of the Cosmological Constant |
| title_sort | saltatory relaxation of the cosmological constant |
| work_keys_str_mv | AT fengj saltatoryrelaxationofthecosmologicalconstant AT marchrussellj saltatoryrelaxationofthecosmologicalconstant AT sethis saltatoryrelaxationofthecosmologicalconstant AT wilczekf saltatoryrelaxationofthecosmologicalconstant |