I suppose that in QM the uncertain measurement is founded on using Light and photons. We can't make light "stable" ! A photon is always moving!
Can we find AQP (Artificial Quantum Particles) with definable and steerable Quantum States?
I suppose actually that Quantum Information Theory is not able to get realised by principal.
not definitively....Quantum Elements which can be used in definitive and predefined way.
I think Fermi-Ions may be a first amount, because they obey the Pauli-Principal.
Check out the paper "anti-photon" (http://link.springer.com/article/10.1007/BF01135846#page-1). (if you'd like access to this, send me a message and I can get it to you; otherwise there is an arxiv article reviewing and extending it here http://arxiv.org/pdf/1009.5119.pdf)
If you analyze the foundation of quantum electrodynamics & the mechanism of the quantum mechanical description of a "photon," you'll find out that its pseudoparticle definition is by nature very strange. It's not a particle that "exists" per say but rather a concept invented to describe the period of time in between electron energy eigenstate transformations in the time-dependent many-body Schrodinger equation. In field theory, this is the same, it's just much easier to see.
Once you start thinking of photons in terms of the quantum excitations of the EM field existing only to perform energy eigenstate transformations of other charged particles, it becomes a lot easier to see why it's difficult to create quantum optics. There are a lot of electrons in optical media, and coherence of quantum states is highly dependent on the entanglement entropy introduced by the number of superpositioned states in the optical media involved.
- "Can we find AQP (Artificial Quantum Particles) with definable and steerable Quantum States?"
Sort of, yes. We can track the process of wavefunction collapse via the mechanisms of individual electron absorption/emission processes, which are really potential absorption/emission processes, and detail the introduced entanglement on our quantum state. We can then describe the motion of these "entanglons" through the optical media, and thus present a full picture of why a particle's (photon's) wavefunction "collapses."
Note that this is all a long way from completion! http://arxiv.org/abs/1401.5387 discusses the propagation of state-correspondence in magnon movement. I have not seen much further research on the subject, but it's a topic I'm starting to explore. Feynman's work (QED) is useful, but it does not fully describe the number of superpositioned states which are introduced; there is a significant amount of "noise" which appears experimentally due to oddities in field theory & how infinite dimensional integrals are hard to solve; we introduce simplifications to the path integral.
I hope this helps. There is a lot of upcoming work in quantum computing & quantum information which I believe will give rise to a new era in computing technology; it is, however, going to be difficult to get there!
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