Chirality in Quantum Computation with Spin Cluster Qubits
  We study corrections to the Heisenberg interaction between several lateral, single-electron quantum dots. We show, using exact diagonalization, that three-body chiral terms couple triangular configurations to external sources of flux rather strongly. The chiral corrections impact single qubit encodings utilizing loops of three or more Heisenberg coupled quantum dots. 
V.W. Scarola, K. Park and S. Das Sarma