The Viterbi Algorithm and Quantum Communications

eldavojohn writes "There have been a lot of tests in using quantum mechanics to communicate across large distances. But a student & a professor at USC have proven that the Viterbi algorithm can be applied to quantum communication. In the traditional Alice sends Bob a message scenario, 'Bob can reliably spot errors, and knows which message qubits are bogus before he opens the message — crucial, because opening it destroys it; and if it is garbled, he has nothing.'"

Alice

[arizwebfoot]

So . . . when is ANYTHING Alice says not garbled?

-----
Spoken like a true married man.

Alice 3 Bob

[nategoose]

I wish Alice and Bob would just go ahead and do it already. Everybody knows they have the hots for one another.

Re:Alice

[Tenrosei]

And for that matter what is the chance Alice will just say it once?

Re:Alice

[Osurak]

And for that matter what is the chance Alice will just say it once?

Go ask Alice. I think she'll know.

Alice?

[RandoX]

Who the ---- is Alice?

Re:Alice 3 Bob

[Warll]

Everybody knows they have the hots for one another.

Kids these days. When will they learn that its not worth the risk. Safe encryption should be practised all the time, not just when you feel like it.

Re:This is for deriving information from Markov se

[Intron]

And for those of you wondering...

Markov was Chekov's evil twin on Star Trek.

Re:Alice

[B'Trey]

Go ask Alice. I think she'll know.

Well, we are talking about QM, where logic and proportion do indeed fall sloppily dead...

Entangling...

[Anonymous Coward]

So you're suggesting Bob and Alice get entangled? That's spooky... too bad we wouldn't be able to watch.

Re:This could be huge

[hansraj]

A big part of the problem with building quantum computers right now is keeping the qubits stable. The real world is constantly trying to "observe" (or interfere with) the qubits. When that happens, your quantum states break down and you lose your computation. This is a bit reason why we've only been able to build small (5-qubit) machines: it's very hard to keep things isolated and stable.

[Emphasis added]

I think the qubits' behavior is very suspicious. Surely if the qubits have nothing to hide, they shouldn't have any problems!

Re:Alice?

[Kingrames]

You can get anything you want at her restaurant, I know that much.

Re:Alice 3 Bob

[rubycodez]

oh crap, now you had to upgrade Schroodinger's cat to a fetus

Re:Alice?

[lilomar]

'Cepting Alice, of course.

Re:Alice

[neomunk]

She's the chick that Bob is seeing behind Eve's back, if I understand the situation correctly.

Re:Alice?

[Alpha Whisky]

Call yourself a nerd? Alice is Dilbert's violent cow-orker and Bob is a large green dinosaur they found behind the couch when they correctly deduced that dinosaurs didn't go extinct but just went into hiding. Sheesh, I thought everyone knew that.