Counter example to a quantum inequality
| dc.creator | Krasnikov, S. | |
| dc.date | 2004-09-01 | |
| dc.date | 2005-05-25 | |
| dc.date.accessioned | 2026-07-07T07:35:54Z | |
| dc.date.available | 2026-07-07T07:35:54Z | |
| dc.description | A `quantum inequality' (a conjectured relation between the energy density of a free quantum field and the time during which this density is observed) has recently been used to rule out some of the macroscopic wormholes and warp drives. I discuss the possibility of generalizing that result to other similar spacetimes and first show that the problem amounts to verification of a slightly different inequality. This new inequality \emph{can} replace the original one, if an additional assumption (concerning homogeneity of the `exotic matter' distribution) is made, and \emph{must} replace it if the assumption is relaxed. Then by an explicit example I show that the `new' inequality breaks down even in a simplest case (a free field in a simply connected two dimensional space). Which suggests that there is no grounds today to consider such spacetimes `unphysical'. | |
| dc.description | Sec. II is completely rewritten: the gulf is discussed between the proven QIs and those used in ruling out exotic spacetimes | |
| dc.identifier | https://arxiv.org/abs/gr-qc/0409007 | |
| dc.identifier | http://arxiv.org/abs/gr-qc/0409007 | |
| dc.identifier | Grav.Cosmol. 46 (2006) 195 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/120253 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Counter example to a quantum inequality | |
| dc.type | text |