Quantum boffins send data Across Time and Space

"Researchers in Israel have pulled a
trick that makes quantum physics
seem even stranger than an episode
of Doctor Who – they've created a
pair of photons that was briefly
entangled not across space, but
across time.

The last time El Reg discussed time-
like entanglement it was being proposed
as a theoretical construct. The idea put
forward then was that by interacting with
the quantum vacuum, two photons
existing at different points in time could
become entangled.

That, however, was just a proposal for
one way that a time-like entanglement
might exist. Now, in this paper at Arxiv
(now published in Physical Review
Letters), the University of Jerusalem
researchers have demonstrated that it
can be done."

See:

http://www.theregister.co.uk/2013/06...oky_with_time/

On 4/06/2013 3:39 AM, wrote:
"Researchers in Israel have pulled a
trick that makes quantum physics
seem even stranger than an episode
of Doctor Who – they've created a
pair of photons that was briefly
entangled not across space, but
across time.

The last time El Reg discussed time-
like entanglement it was being proposed
as a theoretical construct. The idea put
forward then was that by interacting with
the quantum vacuum, two photons
existing at different points in time could
become entangled.

That, however, was just a proposal for
one way that a time-like entanglement
might exist. Now, in this paper at Arxiv
(now published in Physical Review
Letters), the University of Jerusalem
researchers have demonstrated that it
can be done."

See:

http://www.theregister.co.uk/2013/06...oky_with_time/


Given the mechanism of entanglement swapping, it was always going to be
the case that such entanglements could exist if QM was correct. But what
they haven't done is to send data. The math of entanglement doesn't even
suggest that it's possible.

Sylvia.