In the ordered phase of Z2-symmetric collective spin systems, localized pointer states decohere up to 2.42 times faster than energy eigenstates because parity forces zero diagonal matrix elements for the jump operator, removing the cross-term present in the pointer basis.
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Which Coherence Decoheres? Basis-Dependent Decoherence Rates in Symmetry-Broken Collective Spin Systems
In the ordered phase of Z2-symmetric collective spin systems, localized pointer states decohere up to 2.42 times faster than energy eigenstates because parity forces zero diagonal matrix elements for the jump operator, removing the cross-term present in the pointer basis.