Entanglement = Stability?

“The first rule is that this qubit can slide smoothly and continuously between the two states in its superposition. This is sufficient to distinguish quantum theory from classical physics, where such effortless reversible transitions are not possible, but does not rule out a weirder theory.

The second rule is that whatever superposition state the qubit is in, you can only ever extract one bit of information from it- you can only measure it in one state at once.

The third rule applies only to composite systems of two or more qubits. Knowing the probabilities that the individual qubits are in a particular state plus the probabilities of correlations between them tells you the state of the whole system. This encapsulates the property of entanglement between remote quantum states that experiments show holds in the real world.

Only a theory precisely as correlated as quantum theory can obey all the axioms and produce the kind of entanglement observed in nature. Less correlated theories don’t create entanglement at all, while weirder theories produce a situation where, for example, you might measure the state of all the qubits in a system, know the correlations between them, and still not be able to say what state the whole system is in. ‘Entanglement is the unique feature, and it comes out of the three axioms,’ says Brukner.”

Is quantum theory weird enough for the real world? – New Scientist


~ by theobservereffect on August 24, 2010.

2 Responses to “Entanglement = Stability?”

  1. Hi, I’ve been in the blogosphere for about two months, saw your post, and wanted to drop by and say hi.

    I have been working on my theory for about 5 years and it applies the concept of the Planckian quantum to everything from dark energy to dark matter to water to carbon to RNA, protein, DNA, and so on. It was such a powerful heuristic!

    Basically, the theory demonstrates that wave-particle duality is a consequence of the particle oscillating between excited and ground states – but it cannot exist in both states at the same time – while moving in the path of a gyre. The gyric path of the particle manifests itself as the waveform. I haven’t arrived at an explanation of the electron and photon at my blog yet; right now I’m treating genetic phenomena. I welcome comments and constructive criticism.



  2. […] the observer effect I love science. In particular, I love quantum physics. The work of Bell, Bohr, Schrodinger, Heisenberg, Dirac, Bohm, DeBroglie, Feynman, Wheeler, DeWitt, Von Neumann, Wigner, Penrose, Everett (and others) excites and inspires me. Their experiments raise an open question regarding the nature of existence; their findings allude to the role of consciousness in the construct of reality. Quantum theory proves that it is the act of observation itself that causes a wave function to collapse out of either/or uncertainty into what we experience as a particular reality… My “reality.” Your “reality.” Everybody’s “reality.” […]

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