Publications
Robustness of optimally controlled unitary quantum gates
A unitary quantum gate is the basic functioning element of a quantum computer. Summary of results: (1) Robustness of a general n-qubit gate = 1 - F {proportional_to} 2{sup n}; (2) Robustness of a universal gate with complete isolation of one-and two-qubit subgates = 1 - F {proportional_to} n; and (3) Robustness of a universal gate with small unwanted couplings between the qubits is unclear.