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Published in 2018 at "Transactions of the American Mathematical Society"
DOI: 10.1090/tran/7461
Abstract: In this work we study the following three space problem for operator spaces: if X is an operator space with base space isomorphic to a Hilbert space and X contains a completely isomorphic copy of…
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Keywords:
space;
operator spaces;
completely isomorphic;
twisting operator ... See more keywords
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Published in 2025 at "Physical review letters"
DOI: 10.1103/29j7-ltfn
Abstract: We propose a general necessary condition for a spin chain with SO(3) spin-rotation symmetry to be gapped. Specifically, we prove that the ground state(s) of an SO(3)-symmetric gapped spin chain must be spin singlet(s), and…
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Keywords:
gapless phases;
phases twisting;
identification gapless;
twisting operator ... See more keywords