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Stephen Hawking at 70: Exclusive interview – opinion – 04 January 2012 – New Scientist

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Einstein referred to the cosmological constant as his “biggest blunder”.  What was yours?

I used to think that information was destroyed in black holes. But the AdS/CFT correspondence led me to change my mind. This was my biggest blunder, or at least my biggest blunder in science.

NS: Black holes consume everything, including information, that strays too close. But in 1975, together with the Israeli physicist Jakob Bekenstein, Hawking showed that black holes slowly emit radiation, causing them to evaporate and eventually disappear. So what happens to the information they swallow? Hawking argued for decades that it was destroyed – a major challenge to ideas of continuity, and cause and effect. In 1997, however, theorist Juan Maldacena developed a mathematical shortcut, the “Anti-de-Sitter/conformal field theory correspondence”, or AdS/CFT. This links events within a contorted space-time geometry, such as in a black hole, with simpler physics at that space’s boundary.

In 2004, Hawking used this to show how a black hole’s information leaks back into our universe through quantum-mechanical perturbations at its boundary, or event horizon. The recantation cost Hawking a bet made with fellow theorist John Preskill a decade earlier.


Footer: Autoposted dengan [ email ] dari [ sunu’s posterous ]


Catatan: Pelajaran nyata yang bagus bagi para ilmuwan agar tidak merasa paling hebat dan sok pintar 😛 . Seorang sekaliber Stephen Hawking bahkan mau mengakui kebenaran relatif yang diajukan orang lain, bahkan dengan konsekuensi harus membatalkan (menarik kembali) argumentasinya yang terdahulu.

Itu sikap seorang ilmuwan hebat sekaliber Stephen Hawking. Siapa saya, siapa anda, siapa kita? Sudahkah kita diakui dunia internasional sehebat Stephen Hawking? Mari berpikir ulang 🙂

Written by sunupradana

January 6, 2012 at 4:35 pm

Posted in Pendidikan, Science

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