Spin-based quantum computation in multielectron quantum dots

Abstract

In a quantum computer the hardware and software are intrinsically connected\nbecause the quantum Hamiltonian (or more precisely its time development) is the\ncode that runs the computer. We demonstrate this subtle and crucial\nrelationship by considering the example of electron-spin-based solid state\nquantum computer in semiconductor quantum dots. We show that multielectron\nquantum dots with one valence electron in the outermost shell do not behave\nsimply as an effective single spin system unless special conditions are\nsatisfied. Our work compellingly demonstrates that a delicate synergy between\ntheory and experiment (between software and hardware) is essential for\nconstructing a quantum computer.\n