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Título

Molecular nanomagnets as prototypes for spin-based quantum logic gates

AutorLuis, Fernando
Fecha de publicación2012
CitaciónICE-0 (2012)
ResumenIn recent years, magnetic molecular clusters have been proposed as suitable materials for the realization of the quantum computer hardware. In this work, we argue that molecular clusters containing two lanthanide (e.g. Tb) magnetic ions meet all ingredients required to implement a universal CNOT quantum logic gate. The definition of control and target qubits is based on the strong magnetic anisotropy and the magnetic inequivalence of the two ions, which has been achieved by chemically engineering dissimilar coordination spheres. The magnetic asymmetry also provides a method to realize a SWAP gate in the same cluster. Electronic paramagnetic resonance experiments confirm that CNOT and SWAP transitions are not forbidden and provide a method to determine the decohernce time scales. Although we have mainly considered Tb2, for which the magnetic asymmetry can be easily determined on account of its large angular momentum, the same molecular structure can be realized with other lanthanide ions. This flexibility enables a vast choice of quantum gate designs, which will be also discussed. Molecular clusters are also stable in solution, which opens the additional possibility of depositing them onto quantum circuits, SQUIDs or rf superconducting resonators, able to manipulate its quantum spin state. Chemically engineered molecular quantum gates can therefore open promising avenues for the realization of scalable quantum computing architectures.
DescripciónResumen del trabajo presentado al Workshop Información Cuántica en España celebrado en Madrid (España) del 17 al 19 de septiembre de 2012.
URIhttp://hdl.handle.net/10261/121972
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