Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 32: Quantum Information: Atoms and Ions II
Q 32.2: Vortrag
Mittwoch, 10. März 2010, 14:15–14:30, E 214
Coupling of individual electron spins in a room temperature solid — •Philipp Neumann, Roman Kolesov, Boris Naydenov, Johannes Beck, Florian Rempp, Matthias Steiner, Fedor Jelezko, and Jörg Wrachtrup — 3. Physikalisches Institut, Universität Stuttgart, Germany
Building quantum information devices goes far beyond the coherent control of single quantum systems. The challenge for every physical realization of such devices lies at the coherent coupling of their individual constituents that enables generation of nonlocal quantum states. This has been demonstrated for a variety of systems one of them being the Nitrogen-Vacancy (NV) defect center in diamond.1,2 This artificial atom represents an electron spin qubit at room temperature. Together with surrounding nuclear spins in the diamond lattice quantum registers of up to 4 spin qubits have been realized.3 Another way of scaling up this spin system is the direct magnetic dipolar coupling of closely spaced NV centers. Here we show recent results of such coupling of two NV centers. Conditional two-qubit gates are realized and the interaction is used to determine the relative position of the two centers in the diamond lattice with an uncertainty of one unit cell.
1 M.V.G. Dutt et al., Science 316, 1312 (2007)
2 P. Neumann et al., Science 320, 1326 (2008)
3 N. Mizuochi et al., PRL 80, 041201(R) (2009)