Physics – Quantum Physics
Scientific paper
2011-12-22
Physics
Quantum Physics
5 pages, 4 figures
Scientific paper
Successful experiments with molecules using nuclear magnetic resonance (NMR) and with trapped ions have been an important driving force for quantum information science. Scalability of NMR is hampered mainly by the use of ensembles of molecules. Also, nuclear spin resonances and J-coupling between spins are given by nature, and often are not well suited for quantum computing. Here, we report on the experimental investigation of an individual 3-spin pseudo-molecule using trapped ions with adjustable magnetically induced J-type coupling between spin states. This coupling is employed to entangle distant spins. Resonances of individual spins are well separated and are addressed with high fidelity. Quantum gates are carried out using microwave radiation in the presence of thermal excitation of the pseudo-molecule's vibrations. Demonstrating Conditional-NOT gates between non-nearest neighbors serves as a proof-of-principle of a quantum bus employing a spin chain. Thus, ion-spin molecules combine advantageous features of NMR and trapped ions, respectively.
Gloger T. F.
Johanning Michael
Khromova Anastasiya
Piltz Ch.
Scharfenberger Burkhard
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