منابع مشابه
Discrete and Canonical Quantum Variables
Quantum mechanics, and in particular the language of quantum mechanics, is deeply entangled with the way physics is done on its many branches. Therefore, the interpretation of the formalism might have a crucial role on areas where both theoretical and experimental efforts are highly developed. Nuclear physics, with its need to take into account so many different effects – which are better under...
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The relationship of quantum mechanics and gravity has been a problematic one since the early attempts to quantize the theory of general relativity. There are a plethora of prima facie difficulties (see [1] for a summary) that one faces even before laying down any specific approach to the subject. This has discouraged many people away from the field. On the other hand, it is not healthy to just ...
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Quantum canonical transformations of the second kind and the non-Hermitian realizations of the basic canonical commutation relations are investigated with a special interest in the generalization of the conventional ladder operators. The opeator ordering problem is shown to be resolved when the non-Hermitian realizations for the canonical variables which can not be measured simultaneously with ...
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Often the random vector variable, X, being encountered, for example, in atmospheric, biological, economic and environmental and other research, is of a large dimension but admits of meaningful grouping(s) into two or more mutually exclusive and exhaustive subvectors. Dimension reduction techniques are then sought to obtain “representative” new variables for each group to be formed by taking sui...
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Sampling rate conversion (SRC) is one of important issues in modern sampling theory. It can be realized by up-sampling, filtering, and down-sampling operations, which need large complexity. Although some efficient algorithms have been presented to do the sampling rate conversion, they all need to compute the N-point original signal to obtain the up-sampling or the down-sampling signal in the tim...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2003
ISSN: 0103-9733
DOI: 10.1590/s0103-97332003000200016