What you know you can't explain, but you feel it. You've felt it your entire life, that there's something wrong with the world. You don't know what it is, but it's there, like a splinter in your mind, driving you mad.
What you know you can't explain, but you feel it. You've felt it your entire life, that there's something wrong with the world. You don't know what it is, but it's there, like a splinter in your mind, driving you mad.
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Tools /
MpLocalExpectationThis tool calculates the local expectation value of an operator <O(i)> for a range of lattice sites. Matrix Product Toolkit version HEAD-0.7.4.0 (subversion tree rev 802) Compiled on Dec 10 2007 at 11:47:35 usage: mp-localexpectation <lattice> <psi> <operator> <first> <last> The operator must be defined in the SiteBlock of the model, and is therefore limited to a local quantity. The 'first' and 'last' indices are raw indices of the n'^th' A-matrix, NOT the coordinates defined by the lattice. This tool is roughly equivalent to running mp-expectation in a loop: for i in `seq $first $last` ; do mp-expectation psi "$operator($i)" ; done but it is much more efficient, requiring only a single sweep to obtain all values. ExamplesTo obtain the local particle density N at each of the first 40 sites of a particle model, use mp-localexpectation lattice psi N 1 40 See also |