Quantum register based on coupled electron spins in a room-temperature solid

被引：454

作者：

Neumann, P. ^{[1
]}

Kolesov, R. ^{[1
]}

Naydenov, B. ^{[1
]}

Beck, J. ^{[1
]}

Rempp, F. ^{[1
]}

Steiner, M. ^{[1
]}

Jacques, V. ^{[1
]}

Balasubramanian, G. ^{[1
]}

Markham, M. L. ^{[2
]}

Twitchen, D. J. ^{[2
]}

Pezzagna, S. ^{[3
]}

Meijer, J. ^{[3
]}

Twamley, J. ^{[4
]}

Jelezko, F. ^{[1
]}

Wrachtrup, J. ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Phys 3, D-70550 Stuttgart, Germany

[2] Element Six Ltd, Ascot SL5 8BP, Berks, England

[3] Ruhr Univ Bochum, Ctr Lab Ion Beam & Radionuclides, D-44780 Bochum, Germany

[4] Macquarie Univ, Ctr Quantum Comp Technol, Sydney, NSW 2109, Australia

来源：

NATURE PHYSICS | 2010年 / 6卷 / 04期

关键词：

NUCLEAR-SPIN; SINGLE SPINS; COHERENT DYNAMICS; DIAMOND; CENTERS; QUBITS; ENTANGLEMENT; DOTS;

D O I：

10.1038/NPHYS1536

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Devices that harness the laws of quantum physics hold the promise for information processing that outperforms their classical counterparts, and for unconditionally secure communication(1). However, in particular, implementations based on condensed-matter systems face the challenge of short coherence times. Carbon materials(2,3), particularly diamond(4-6), however, are suitable for hosting robust solid-state quantum registers, owing to their spin-free lattice and weak spin-orbit coupling. Here we show that quantum logic elements can be realized by exploring long-range magnetic dipolar coupling between individually addressable single electron spins associated with separate colour centres in diamond. The strong distance dependence of this coupling was used to characterize the separation of single qubits (98 +/- 3 angstrom) with an accuracy close to the value of the crystal-lattice spacing. Our demonstration of coherent control over both electron spins, conditional dynamics, selective readout as well as switchable interaction should open the way towards a viable room-temperature solid-state quantum register. As both electron spins are optically addressable, this solid-state quantum device operating at ambient conditions provides a degree of control that is at present available only for a few systems at low temperature.

引用

页码：249 / 253

页数：5

共 26 条

[1]

Balasubramanian G, 2009, NAT MATER, V8, P383, DOI [10.1038/nmat2420, 10.1038/NMAT2420]

[2]

Temporal coherence of photons emitted by single nitrogen-vacancy defect centers in diamond using optical Rabi-oscillations [J].