Pseudospin Quantum Computation in Semiconductor Nanostructures

V. W. Scarola, K. Park, S. Das Sarma

Published 2003-04-09, updated 2003-10-13Version 2

We theoretically show that spontaneously interlayer-coherent bilayer quantum Hall droplets should allow robust and fault-tolerant pseudospin quantum computation in semiconductor nanostructures with voltage-tuned external gates providing qubit control and a quantum Ising Hamiltonian providing qubit entanglement. Using a spin-boson model we estimate decoherence to be small $(\sim 10^{-5})$.