One- and two-dimensionalN-qubit systems in capacitively coupled quantum dots

Tetsufumi Tanamoto
2001 Physical Review A. Atomic, Molecular, and Optical Physics  
Coulomb blockade effects in capacitively coupled quantum dots can be utilized for constructing an N-qubit system with antiferromagnetic Ising interactions. Starting from the tunneling Hamiltonian, we theoretically show that the Hamiltonian for a weakly coupled quantum-dot array is reduced to that for nuclear magnetic resonance (NMR) spectroscopy. Quantum operations are carried out by applying only electrical pulse sequences. Thus various error-correction methods developed in NMR spectroscopy
more » ... NMR quantum computers are applicable without using magnetic fields. A possible measurement scheme in an N-qubit system is quantitatively discussed.
doi:10.1103/physreva.64.062306 fatcat:rlbgs546m5hgvnycojy2vbmbc4