Using contextual subspace reduction and DMRG-biased stabilizers, a 5-qubit VQE on IBM hardware estimated the Kagome Heisenberg ground state with 0.019% relative error.
Commuting operators share a common eigenbasis, so for a symmetry S of a Hamiltonian H, meaning [H,S ] = 0, ifH|ψ⟩ =E|ψ⟩ then we must also 8 haveS|ψ⟩ =s|ψ⟩ for some eigenvalues ofS
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Simulating the Antiferromagnetic Heisenberg Model on a Spin-Frustrated Kagome Lattice with the Contextual Subspace Variational Quantum Eigensolver
Using contextual subspace reduction and DMRG-biased stabilizers, a 5-qubit VQE on IBM hardware estimated the Kagome Heisenberg ground state with 0.019% relative error.