Partial Trace

In linear algebra and functional analysis, the partial trace is a generalization of the trace. Whereas the trace is a scalar valued function on operators, the partial trace is an operator-valued function. The partial trace has applications in quantum information and decoherence which is relevant for quantum measurement and thereby to the decoherent approaches to interpretations of quantum mechanics, including consistent histories and the relative state interpretation.

Read more about Partial Trace:  Details, Partial Trace For Operators On Hilbert Spaces, Partial Trace and Invariant Integration, Partial Trace As A Quantum Operation

Famous quotes containing the words partial and/or trace:

    The only coöperation which is commonly possible is exceedingly partial and superficial; and what little true coöperation there is, is as if it were not, being a harmony inaudible to men. If a man has faith, he will coöperate with equal faith everywhere; if he has not faith, he will continue to live like the rest of the world, whatever company he is joined to.
    Henry David Thoreau (1817–1862)

    Some wood-daemon
    has lightened your steps.
    I can find no trace of you
    in the larch-cones and the underbrush.
    Hilda Doolittle (1886–1961)