Ballistic electron waveguide adder
Michael G. Snyder, L. E. Reichl · Physical Review A · 2004
We analyze a quantum network, constructed with ballistic electron waveguides, which can add one-bit binary numbers. We consider two different adder networks, one constructed with Hadamard gates and the other constructed with $\sqrt{\mathrm{NOT}}$ gates. Reflection of electron probability at the gates causes a loss in fidelity of the overall calculation. A fidelity requirement for the implementation of individual rotation gates corresponding to a probability $p>1∕2$ of completing the addition successfully is found.