Slashdot Mirror

← Back to Stories (view on slashdot.org)

Three Electrons Entangled

Posted by chrisd on from the happy-particles-of-fate dept.

An anonymous reader writes "Science Blog reports on Michigan researchers who have managed to entangle three electrons at once. "The quantum entanglement of three electrons, using an ultrafast optical pulse and a quantum well of a magnetic semiconductor material, has been demonstrated in a laboratory at the University of Michigan, marking another step toward the realization of a practical quantum computer. While several experiments in recent years have succeeded in entangling pairs of particles, few researchers have managed to correlate three or more particles in a predictable fashion.""

7 of 44 comments (clear)

  1. Algorithms? by astroboscope · · Score: 3, Interesting

    Can anyone outline some algorithms that use 3 way entanglement?

    --
    If we were ants living on a Rubik's cube, differential geometry would be a little more confusing.
    1. Re:Algorithms? by diggitzz · · Score: 2, Interesting

      A 3-D Shor's Algorithm, perhaps?

      --
      -=[You cannot consistently judge this statement to be true.]=-
  2. Q-Crypto by Ratso+Baggins · · Score: 2, Interesting

    Does this mean (theoretically) you could entangle a third photon to an already entangled pair and then strip it off - of course without harming the originally entangeled pair?

    --

    --
    "we live in a post-ideological world..." - Billy Bragg.

    1. Re:Q-Crypto by QEDog · · Score: 4, Interesting

      No. Since the three of them are entangled, they all collapse together when one is measured. The important thing about this article is that you need many entangled electrons to make most complicated calculations, the same way you want many logic gates connected to each other in a computer.

      --
      "There is no teacher but the enemy."-Mazer Rackham
  3. Re:Quantum Teleportation? by wowbagger · · Score: 3, Interesting

    The first particle isn't destroyed in quantum teleportation. What is destroyed is the quantum state of they particle - what spin/polarization it had.

    To put it very loosely - in quantum teleportation, the original object would be scrambled. But it would still exist as mass.

    --
    www.eFax.com are spammers
  4. So would this mean ... by GreatOgre · · Score: 2, Interesting

    more focus on ternary (I think that's right) computing?

  5. Don't get too excited by exp(pi*sqrt(163)) · · Score: 3, Interesting

    What they have done is carry out a particular entangling. Getting a bunch of particles entangled is otherwise a commonplace occurence. Any bunch of particles that interact non-trivially is entangled. It's the non-entangled states that are the exception!

    --
    Doesn't it make you feel good to know that our freedoms are protected by politicans, lawyers and journalists.