On the purification of factor states
On the purification of factor states
复制标题
论因子状态的净化
DOI:
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复制
发表时间:
1972
期刊:
影响因子:
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通讯作者:
S. Woronowicz
中科院分区:
文献类型:
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作者:
S. Woronowicz
AbstractLet
$$mathfrak{A}$$
be aC*-algebra and
$$mathfrak{A}^ circ $$
be an opposite algebra. Notions of exact andj-positive states of
$$mathfrak{A}^ circ $$
⊗
$$mathfrak{A}$$
are introduced. It is shown, that any factor state ω of
$$mathfrak{A}$$
can be extended to a pure exactj-positive state
$$ ilde omega $$
of
$$mathfrak{A}^ circ $$
⊗
$$mathfrak{A}$$
. The correspondence ω→
$$ ilde omega $$
generalizes the notion of the purifications map introduced by Powers and Størmer. The factor states ω1 and ω2 are quasi-equivalent if and only if their purifications
$$ ilde omega _1 $$
and
$$ ilde omega _2 $$
are equivalent.