The claimed intrinsic dipole moment at FQH edges is protected only at filling factor 1/3 and absent in other representative edge systems.
In constructing the MPO, we introduce a cutoffϵand discard all terms with|Vm1,m2,m3,m4 |< ϵ, typically takingϵ= 10 −5
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Does a Fractional Quantum Hall Edge Have a Protected Intrinsic Dipole Moment?
The claimed intrinsic dipole moment at FQH edges is protected only at filling factor 1/3 and absent in other representative edge systems.