Wormhole entanglement solves black hole paradox
2013 06 27

By Jacob Aron | NewScientist

Wormholes – tunnels through space-time that connect black holes – may be a consequence of the bizarre quantum property called entanglement. The redefinition would resolve a pressing paradox that you might be burned instead of crushed, should you fall into a black hole.


Knowing which hazard sign to erect outside a black hole isn’t exactly an everyday problem. For theoretical physicists, though, it reveals an inconsistency between quantum mechanics and general relativity. Solving this conundrum might lead to the sought-after quantum theory of gravity.

Relativity says if you fall into a black hole, you would die via "spaghettification" – a gradual stretching by ever-more intense gravitational forces. But last year, when Joseph Polchinski at the University of California in Santa Barbara and colleagues explored the quantum implications of black holes, they hit a problem. Black holes emit photons via something called Hawking radiation, and these are "entangled" with the interior of the black hole and also with each other. This breaks a quantum rule that particles can’t be entangled with two things at once.

To preserve quantum monogamy, Polchinski suggested last year that the black hole-photon entanglement breaks down. That causes a wall of energy at the black hole’s event horizon that wrecks relativity because anyone falling in would burn up rather turn to spaghetti. Welcome to the black hole firewall paradox.

Possible solutions abound but now two physics heavyweights, Juan Maldacena of the Institute for Advance Study in Princeton, and Leonard Susskind of Stanford University, California, have come up with the most audacious one yet: a new kind of wormhole that means the entanglement needn’t be broken in the first place.

First, the pair showed that these space-time tunnels, usually described by the maths of general relativity, also emerge from quantum theory, if two black holes are entangled. It’s as if the wormhole is the physical manifestation of entanglement.

The pair then extended this idea to a single black hole and its Hawking radiation, resulting in a new kind of wormhole (see diagram). Crucially, they suggest that this wormhole, which links a black hole and its Hawking radiation, may not be a problem for quantum monogamy in the way that normal entanglement is. As a result, the firewall needn’t appear, preserving relativity (arxiv.org/abs/1306.0533).

Patrick Hayden of McGill University in Montreal, Canada, finds the idea of wormholes from entangled black hole pairs convincing, but says more work is needed for the case of the black hole and a photon. Polchinski, meanwhile, is cautiously optimistic: "It certainly injects new ideas. But there is a lot that still needs to be filled in."

[...]

Read the full article at: newscientist.com









Related Articles
Super-Giant Black Hole Baffles Scientists
Countdown to a black hole show
Supermassive Black Hole Eats Star, Spews Bright Gamma-Ray Flares
Super-Civilizations Might Live off Black Holes
Satellite Photographs ’Black Hole’ on Earth
That’s a Big One! Black hole is most massive known
We may exist inside a black hole, scientist says
BBC Horizon 2005: The Hawking Paradox (Big Bang)


Latest News from our Front Page

Israel proposes natural gas pipeline to Southern Europe
2014-12-16 12:39
Israel is pushing for the European Union (EU) to approve the construction of a pipeline running from the Middle Eastern country to supply Cyprus, Greece and Italy with natural gas. The proposed EastMed pipeline will carry gas from the Tamar and Leviathan gas fields located in the Mediterranean Sea, to Southern Europe. As the Times of Israel reported in an ...
As Robots Grow Smarter, American Workers Struggle to Keep Up
2014 12 16
A machine that administers sedatives recently began treating patients at a Seattle hospital. At a Silicon Valley hotel, a bellhop robot delivers items to people’s rooms. Last spring, a software algorithm wrote a breaking news article about an earthquake that The Los Angeles Times published. Although fears that technology will displace jobs are at least as old as the Luddites, there ...
Lockheed Martin, Boeing to explore deep space together with Russia
2014 12 16
Russian Space Corporation Energiya and Lockheed Martin plan adapting the newest US manned spaceship Orion for dockings with Russian spaceships, Vladimir Solntsev, the president of the corporation said in an interview published by Izvestia daily. “The space ships should be adapted to one another and common sense prompts us we should be able to dock them,” he believes. “It’s important to ...
Anti-White UN says Sweden has “Afrophobia”
2014 12 16
United Nations Human Rights Inspectors who made an official 5-day visit to Sweden said the country has “a heightened xenophobic and racist attitude against migrants and refugee communities with African descent” “Afro-Swedes and Africans with whom we met expressed their experiences of multiple forms of discrimination based on their skin color, race, religion and sex,” The inspectors said Sweden needs “to develop ...
Energy depletion in a human being
2014 12 16
Energy. As in: energy depletion. Without energy, the individual feels trapped. In that state, he seeks to conform, fit in, survive long enough to die of old age. Body and mind deploy various feedback mechanisms to inform a person about his “available supply of energy,” and when these signals are taken as absolute truth, trouble comes. “I can sense my energy is dwindling. So ...
More News »