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The control of the dynamics of quantum states in nanoscale structures has become a major research challenge during the last few years, partly due to the potential applications in quantum computation and information technologies. Several condensed matter systems have been proposed as qubits for quantum computation (i.e. SQUIDs, quantum dots, SMMs…). Recent advances have especially been achieved with SQUIDs and quantum dots, where a controlled manipulation of the quantum states of these systems has been demonstrated (i.e. quantum coherent oscillations in single and multi-qubit entanglement states). The effort of the SMMs community is aimed in this direction.
An important component of our research plans will attempt to develop the appropriate experimental techniques to study and manipulate the quantum dynamics of the magnetization in SMMs. An essential tool for the study of quantum dynamics of the magnetization in SMMs is the ability to use radiation of a frequency that coincides with the energy separation between the spin states under study. In SMMs this frequency lies in the range of microwave radiation and can be artificially generated and conducted toward the sample with the appropriate instrumentation and experimental setup. For this we will develop an hybrid experimental technique of measurement which will combine high sensitivity magnetization measurements and high frequency microwave excitation at ultra-low temperatures (T ~15 mK).
Our main objective is to carry out spin-echo experiments to estimate the decoherence time of SMMs and the effect of the environmental degrees of freedom on coherent spin states of the molecules
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