A Trilogy of Trifles for Quantum Technology
Lu J. Sham
Department of Physics, University of California San Diego

The trilogy of issues for quantum technology is the preservation of quantum superposition, the measurement of a single quantum object, and the control of the same. I hope that these trifles in the optical control of electron spin in a quantum dot may, nonetheless, be of more general use.
1.    How an electron loses its coherence and rescued by the Maxwell Angel.
2.    How a continuous weak optical measurement of an electron spin produces a random sequence of data and sheds light on the electron spin dynamics.
3.    How the precision of a small angle rotation of the spin can limit scalability and be implemented by imitating practices in classical computation.