Quantum technologies and hybrid quantum systems

Single spins in diamond belong to most promising solid state qubits. The long living spin state of single defects can be readout optically and manipulated using well established magnetic resonance technique. Furthermore, excellent coherence properties of single spins associated with defects in diamond are preserved even at room temperature. We are aiming to develop salable quantum register based on single nuclear and electron spins.  The small scale quantum register consisting of single electron and nuclear spins can be used in experiments aiming to test fundamental questions of quantum mechanics in solid state. One of the crucial advantages of defects in diamond is intrinsic coupling of spins to photons allowing their use in quantum communication protocols.

_{Related publications}

_{Neumann P, et al. 2010. Quantum register based on coupled electron spins in a room-temperature solid. Nature Physics 6: 249-253.}

_{O'Brien JL, Ladd TD, Jelezko F, Laflamme R, Nakamura Y, Monroe C. 2010. Quantum computers. Nature 464: 45-53.}

_{Wrachtrup J, Neumann P, Beck J, Steiner M, Rempp F, Fedder H, Hemmer PR, Jelezko F. 2010. Single-Shot Readout of a Single Nuclear Spin. Science 329: 542-544.}

_{Wrachtrup J, Neumann P, Mizuochi N, Rempp F, Hemmer P, Watanabe H, Yamasaki S, Jacques V, Gaebel T, Jelezko F. 2008. Multipartite entanglement among single spins in diamond. Science 320: 1326-1329.}

_{Lukin MD, Childress L, Dutt MVG, Taylor JM, Zibrov AS, Jelezko F, Wrachtrup J, Hemmer PR. 2006. Coherent dynamics of coupled electron and nuclear spin qubits in diamond. Science 314: 281-285.}

_{Lukin MD, Dutt MVG, Childress L, Jiang L, Togan E, Maze J, Jelezko F, Zibrov AS, Hemmer PR. 2007. Quantum register based on individual electronic and nuclear spin qubits in diamond. Science 316: 1312-1316.}