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  1. Jun 2020
    1. tunnel splitting

      What exactly is tunnel splitting? The essay mentions this various times without clearly explaining what it is, and whenever I search it up online multiple things are said about it.

      From what I could understand, quantum spin tunnel splitting makes it so that the magnetization of a system can "switch between states with opposite magnetization that are separated by an energy barrier much larger than thermal energy". But what exactly happens during tunnel splitting? And why are there different ones mentioned in the article? [magnetization tunneling, zero-field tunnel splitting, ground-state tunnel splitting]

      I also understand that this phenomenon "defies classical physics" because of magnetization switching. How is that possible?