Abstract
A molecular spin quantum computer (MSQC) is a model of QCs, in which we manipulate bus electron spins with client nuclear spins by pulse-based electron spin/magnetic resonance (ESR/MR) techniques applied to well-defined open-shell molecular entities. The spin manipulation executes quantum computation ranging over all Hilbert space, which is achieved by sets of quantum gate operations, called universal gates. The bus electron spin quantum bits (qubits) interact extensively with other electron spins and relatively localized nuclear spins as client qubits. Since the electron spins play the central role in MSQCs, MSQCs can simply be regarded as ESR-QCs. Generally compared with NMR-QC, ESR-QCs have advantages in fast gate operations, global control in client qubits, and initialization process. On the other hand, apparent disadvantages are fast decoherence and technical difficulties in current spin manipulation technology.
Published Version
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