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What is the difference between spin glass and spin liquid?

Do they both originate from frustration?

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They are both frustrated. The difference resides in the level of quantum fluctuation. The spin glass has no quantum fluctuation, but the spin liquid has very strong quantum fluctuation. –  Everett You May 10 '13 at 17:42
    
Why doesn't spin glass have quantum fluctuation? even in zero temperature? –  hlew May 11 '13 at 11:56
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Because they are classical spin models, or the spin is large such that the fluctuation is weak. –  Everett You May 11 '13 at 14:37

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