Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Quantum pseudo-telepathy refers to how, in some specific coordination games, isolated players can do better when they have pre-shared some entangled qubits. I understand how it works in theory and wrote about it, but I'm curious if it's something we can do in practice.

How close are we to being able to do real life runs of these games, where a quantum strategy is used to win more often than possible with classical strategies? I know we don't have quantum computers with more than a few qubits now, but the game in the wikipedia article seems to only require two per player.

What if we relax some of the constraints, like just saying "you've been isolated" instead of actually separating the players/machines by large distances? Or allowing the entangled qubits to be generated on demand instead of ahead of time?

If we can't do it yet, or in the near future, what are the obstacles?

share|cite|improve this question
What's the difference between "telepathy" and good ol' violation of Bell inequalities? – Emilio Pisanty Sep 28 '13 at 16:42
@Emilio I mostly just find it to be an interesting application. More relatable than measurements agreeing more often than you'd expect, because it directly shows you can use it. In this review paper Gilles Brassard et al. mention it's a good way to demonstrate QM is correct. – Strilanc Sep 28 '13 at 17:09
I'm not saying I don't like it. But it does feel like it's a re-packaging of (possibly a specific class of) what's normally known as Bell inequality violations. – Emilio Pisanty Sep 28 '13 at 17:22

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.