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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3428| Title: | Hawking-like radiation does not require a trapped region |
| Keywords: | General Relativity and Quantum Cosmology Hawking radiation Trapped regions Horizons Acoustic spacetimess |
| Publisher: | American Physical Society |
| Description: | revtex4, 4 pages, 1 figure.-- Final version of the paper available at: http://prl.aps.org/ We discuss the issue of quasi-particle production by "analogue black holes" with particular attention to the possibility of reproducing Hawking radiation in a laboratory. By constructing simple geometric acoustic models, we obtain a somewhat unexpected result: We show that in order to obtain a stationary and Planckian emission of quasi-particles, it is not necessary to create a trapped region in the acoustic spacetime (corresponding to a supersonic regime in the fluid flow). It is sufficient to set up a dynamically changing flow asymptotically approaching a sonic regime with sufficient rapidity in laboratory time. Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3428 |
| Other Identifiers: | Phys.Rev.Lett. 97 (2006) 171301 arXiv:gr-qc/0607008v1 0031-9007 http://hdl.handle.net/10261/3428 |
| Appears in Collections: | Digital Csic |
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