228 citations · 724 across the 35 of their papers we have counts for
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math.OA2019★ 6 cited
A classification of pure states on quantum spin chains satisfying the split property with on-site finite group symmetries
Yoshiko Ogata
We consider a set of pure split states on a quantum spin chain which are invariant under the on-site action of a finite group . For each ele…
math.OA2013★ 2 cited
Normal states of type III factors
Yasuyuki Kawahigashi, Yoshiko Ogata, Erling Størmer
Let M be a factor of type III with separable predual and with normal states phi_1,...,phi_k, omega with omega faithful. Let A be a finite dimensional C*-subalgebra of M. Then it is…
math.OA2011★ 1 cited
Approximating macroscopic observables in quantum spin systems with commuting matrices
Yoshiko Ogata
Macroscopic observables in a quantum spin system are given by sequences of spatial means of local elements …