Quantum measurement Definition and 57 Threads

Homework Statement Have two Greenberger-Horne-Zeilinger (GHZ) states of qubits A, B, C and D, E, F as follows: \mid GHZ \rangle_{ABC} = \frac{1}{\sqrt{2}} \left( \mid 0 \rangle_{A}\mid 0 \rangle_{B}\mid 0 \rangle_{C} + \mid 1 \rangle_{A}\mid 1 \rangle_{B}\mid 1 \rangle_{C}\right) and...

Hi, all It is said that, in quantum measurement, the phase do play a wee role, but is that turth?

Does the process of genuine prediction act most readily through quantum mechanics, as opposed to psychically or psychologically? Can observers influence the environment through the action of "quantum prediction" as they do quantum measurement? Does quantum prediction rely on the statistics...

http://arxiv.org/PS_cache/quant-ph/pdf/0506/0506100.pdf Title: A New Ontological View of the Quantum Measurement Problem Authors: Xiaolei Zhang Comments: 37 pages. US Naval Research Lab memorandum report NRL/MR/7218--05-8883, paper to be presented at the Albert Einstein Century conference...

(Maybe this should go in philosophy? Feel free to move it.) I'm confused. Well, that's probably because I haven't really learned QM properly, except for the basics of Quantum Computing. But still, I'm confused. Why is measurement modeled as a projection, or a "collapse" of a...

Hi, I am reading Brian Greene's new book "The Fabric of the Cosmos". In the book, Brian Greene talks about the Quantum Measurement Problem, different interpretations of QM, decoherence, etc... Rather than attributing the collapse of the probability wave to things like conscious or human...

In my article "Neurophysiological Uncertainty" on my website http://www.quantumdream.net, I introduce a classical neuronal analog to quantum uncertainty. Here I wish to explore the relative correspondence to the observer by quantum and nonquantum systems. In the quantum system, measurement...