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关于量子信息从黑洞中逃逸的两篇PRL

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yinzhangqi

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关于量子信息从黑洞中逃逸的两篇PRL



一篇是:
Phys. Rev. Lett. 96 061302

Almost Certain Escape from Black Holes in Final State Projection Models

Seth Lloyd
MIT Mechanical Engineering, Cambridge, Massachusetts 02139, USA

(Received 27 June 2004; published 14 February 2006)

Recent models of the black-hole final state suggest that quantum information can escape from a black hole by a process akin to teleportation. These models rely on a controversial process called final-state projection. This Letter discusses the self-consistency of the final-state projection hypothesis and investigates escape from black holes for arbitrary final states and for generic interactions between matter and Hawking radiation. Quantum information escapes with fidelity [approximate](8/3pi)2: only half a bit of quantum information is lost on average, independent of the number of bits that escape from the hole.

这篇论文在physicsweb上有专门的新闻报道:
http://physicsweb.org/articles/news/10/3/1/1?rss=2.0

另外一篇是:
Phys. Rev. Lett. 96 081302 (2006)

Locking Information in Black Holes

John A. Smolin and Jonathan Oppenheim

We show that a central presumption in the debate over black-hole information loss is incorrect. Ensuring that information not escape during evaporation does not require that it all remain trapped until the final stage of the process. Using the recent quantum information-theoretic result of locking, we show that the amount of information that must remain can be very small, even as the amount already radiated is negligible. Information need not be additive: A small system can lock a large amount of information, making it inaccessible. Only if the set of initial states is restricted can information leak.

看起来似乎很有趣。如果我理解正确的话,从标题上看这两篇文献似乎得出了互相矛盾的结论。


我的blog:http://zqyin.wordpress.com


发表时间:2006-03-02, 09:12:44  作者资料

萍踪浪迹

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Re: 关于量子信息从黑洞中逃逸的两篇PRL



是不是和Hawking的前后矛盾有关?


漫漫长夜不知晓 日落云寒苦终宵
痴心未悟拈花笑 梦魂飞度同心桥


发表时间:2006-03-02, 09:23:24  作者资料

地衣

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Re: 关于量子信息从黑洞中逃逸的两篇PRL



yinzhangqi,你是一个信息源。能否把你手边比较好有论文或者综述的网站列一些在这里?


君愁我亦愁


发表时间:2006-03-02, 21:57:58  作者资料

yinzhangqi

发表文章数: 206
武功等级: 逍遥拳
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Re: 关于量子信息从黑洞中逃逸的两篇PRL



关于量子信息综述,可以看看孙昌璞教授的个人主页:http://power.itp.ac.cn/~suncp/quantum.htm
这里是量子计算文献库:http://kh.bu.edu/qcl/


我的blog:http://zqyin.wordpress.com


发表时间:2006-03-03, 03:05:36  作者资料

yinzhangqi

发表文章数: 206
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Re: 关于量子信息从黑洞中逃逸的两篇PRL



轩轩是不是可以给我们讲讲这两篇论文到底得出什么结论?是不是相互矛盾?


我的blog:http://zqyin.wordpress.com


发表时间:2006-03-03, 03:08:29  作者资料

轩轩

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Re: 关于量子信息从黑洞中逃逸的两篇PRL



to yinzhangqi
Although i am very inrested in these two papers,i am by far not familiar with blackhole and the related information loss problem .
these days i am busy doing loop quantum cosmology .
如果黑洞辐射的不是纯粹的黑体谱,那么这个谱肯定是带有信息的. 但我不知道任何细节.


《相对论通俗演义》

i will love you till the null infinity.


发表时间:2006-03-03, 05:21:16  作者资料

孙伊

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Re: 关于量子信息从黑洞中逃逸的两篇PRL



“only half a bit of quantum information is lost on average, independent of the number of bits that escape from the hole”
只有半个bit的信息丢失,而且跟逃逸的信息bit数无关?意思是每个黑洞平均丢失半个bit的信息,黑洞数量越多(哪怕都是Plank质量的微型黑洞),丢失的信息越多?


↑↑↑↑↑↑↑↑偶瞎猜的,错了请不要骂偶,多谢!↑↑↑↑↑↑↑↑


发表时间:2006-03-05, 03:33:27  作者资料