High-Spin Paramagnetic Ions as Qubits and Qutrits for Quantum Computations

Abstract

Paramagnetic ions having two electrons and spin S = 1 in zero magnetic field are proposed for new physical performance of elementary quantum computing operations by pulsed manipulations with electron spins. For this purpose, a new type of microwave pulses with variable phases and different polarizations are shown can be used. Such pulses are able to induce different transitions between ion spin states. Some of those transitions are described by operators similar to quantum computing operators. To describe the effects of such pulses on hig-spin ions, a new way to represent exponential operators as polynomials of the Pauli matrices is proposed.