C. W. Helstrom, Quantum Detection and Estimation Theory. Mathematics in Science and Engineering, vol. 123, New York: Academic Press, 1976.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... b ) 1.26) With these two basic facts, we can lay out the structure of a general quantum measurement. The most general action that can be performed on a quantum system to generate a set of outcomes is [26] 1. to allow the system to be placed in contact with an auxiliary system or ancilla [27] prepared in a standard state, 2. to have the two evolve unitarily so as to become correlated or entangled, and then 3. to perform a repeatable measurement on the ancilla. One might have thought that a measurement on the composite system as a whole in the last stage of this could lead to a more ....

....Generally only bounds for these quantities may be found. This Chapter is devoted to eshing out what is known about the quantum measures of distinguishability. 3.2 The Quantum Error Probability 3.2. 1 Single Sample Case An interesting particular case of the general quantum decision problem [27] is connected to the one introduced in Section 2.2. A given quantum mechanical system is secretly prepared either in the (pure or mixed) state 0 or in the state 1 . These two possibilities are described by the prior probabilities 0 and 1 respectively. It is an observer s task to ....

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C. W. Helstrom, Quantum Detection and Estimation Theory. Mathematics in Science and Engineering, vol. 123, New York: Academic Press, 1976.

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HELSTROM, C. W., Quantum Detection and Estimation Theory, Mathematics in Science and Engineering, vol. 123, Academic Press, 1976.

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