Ultrafast all-optical coherent control of single silicon vacancy colour centres in diamond

Becker, Jens; Görlitz, Johannes; Arend, Carsten; Markham, Matthew; Becher, Christoph

doi:10.1038/ncomms13512

Cited by 112 publications

(136 citation statements)

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“…Our bright and narrowband fiber-integrated diamond nanophotonic quantum node is of immediate technological significance to applications in quantum optics [12]. Combined with advances in quantum control of the diamond SiV center [57][58][59] and schemes for improved spin coherence times [55], this platform opens up new possibilities for realizing large-scale systems involving multiple emitters strongly interacting via photons [11,13].…”

Section: Discussionmentioning

confidence: 99%

Fiber-Coupled Diamond Quantum Nanophotonic Interface

et al. 2017

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-Color centers in diamond provide a promising platform for quantum optics in the solid state, with coherent optical transitions and long-lived electron and nuclear spins. Building upon recent demonstrations of nanophotonic waveguides and optical cavities in single-crystal diamond, we now demonstrate on-chip diamond nanophotonics with a high efficiency fiber-optical interface, achieving > 90% power coupling at visible wavelengths. We use this approach to demonstrate a bright source of narrowband single photons, based on a silicon-vacancy color center embedded within a waveguide-coupled diamond photonic crystal cavity. Our fiber-coupled diamond quantum nanophotonic interface results in a high flux (~ 38 kHz) of coherent single photons (near Fourier-limited at < 1 GHz bandwidth), into a single mode fiber, enabling new possibilities for realizing quantum networks that interface multiple emitters, both onchip and separated by long distances.3

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Section: Discussionmentioning

confidence: 99%

Fiber-Coupled Diamond Quantum Nanophotonic Interface

et al. 2017

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“…through moderate Purcell effect [97]. Although the SiV electronic spin has a much shorter coherence time than that of the NV center, and requires substantial magnetic field for optical addressing [98], its additional metastable orbital states can be optically controlled in ultrafast manner [99] to achieve quantum optical switching and on-chip SiV-SiV entanglement [100]. More recently, Cr- [101], Ni- [102], Ge- [103] and Xe-related [104] centers have been attracting attention for their promising optical properties.…”

Section: Bulk Diamond and Diamond-on-insulatormentioning

confidence: 99%

Material platforms for integrated quantum photonics

Bogdanov¹,

Shalaginov²,

Boltasseva³

et al. 2016

Opt. Mater. Express

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On-chip integration of quantum optical systems could be a major factor enabling photonic quantum technologies. Unlike the case of electronics, where the essential device is a transistor and the dominant material is silicon, the toolbox of elementary devices required for both classical and quantum photonic integrated circuits is vast. Therefore, many material platforms are being examined to host the future quantum photonic computers and network nodes. We discuss the pros and cons of several platforms for realizing various elementary devices, compare the current degrees of integration achieved in each platform and review several composite platform approaches. References and links 1.C. H. Bennett and G. Brassard, "Quantum cryptography: Public key distribution and coin tossing," Proc. IEEE Int. Conf. Comput. Syst. Signal Process. 175, 8 (1984). 2.N. Gisin and R. Thew, "Quantum communication," Nat. Photonics 1, 165-171 (2007). 3.H.-K. Lo, M. Curty, and K. Tamaki, "Secure quantum key distribution," Nat. Photonics 8, 595-604 (2014 553-558 (1992). 6. L. K. Grover, "A fast quantum mechanical algorithm for database search," in Proceedings of the XXVIII Annual ACM Symposium on Theory of Computing -STOC '96 (ACM Press, 1996), pp. 212-219. 7.S. J. Devitt, W. J. Munro, and K. Nemoto, "Quantum error correction for beginners," Reports Prog. Phys. 76, 76001 (2013). 8.T. D. Ladd, F. Jelezko, R. Laflamme, Y. Nakamura, C. Monroe, and J. L. O'Brien, "Quantum computers.," Nature 464, 45-53 (2010). 9.H. J. Kimble, "The quantum internet," Nature 453, 1023-1030 (2008). 10.U. L. Andersen, G. Leuchs, and C. Silberhorn, "Continuous-variable quantum information processing," Laser Photon. Rev. 4, 337 (2010). 11.C. Weedbrook, S. Pirandola, R. García-Patrón, N. J. Cerf, T. C. Ralph, J. H. Shapiro, and S. Lloyd, "Gaussian quantum information," Rev. Mod. Phys. 84, 621-669 (2012). 12.U. L. Andersen, J. S. Neergaard-Nielsen, P. Van Loock, and A. Furusawa, "Hybrid discrete-and continuous-variable quantum information," Nat. Phys. 11, 713-719 (2015). 13.E. Knill, R. Laflamme, and G. J. Milburn, "A scheme for efficient quantum computation with linear optics," Nature 409, 46-52 (2001 Zeilinger, "Experimental one-way quantum computing," Nature 434, 169-176 (2005). 17.R. Raussendorf, J. Harrington, and K. Goyal, "Topological fault-tolerance in cluster state quantum computation," New J. Phys. 9, 199-199 (2007 A 192-196 (2015 O. Benson, "Assembly of hybrid photonic architectures from nanophotonic constituents.," Nature 480,

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“…These optical properties were recently used to show strong interactions between single photons and single SiV − centers and to probabilistically entangle two SiV − centers in a single nanophotonic device [16]. At 4 K, however, the SiV − spin coherence is limited to ∼ 100 ns due to coupling to the phonon bath, mediated by the spin-orbit interaction [17][18][19][20][21].In this Letter, we demonstrate high-fidelity coherent manipulation and single-shot readout of individual SiV − spin qubits in a dilution refrigerator. In particular, we extend the coherence time of the SiV − electronic spin by five orders of magnitude to 13 ms by operating at 100 mK [22].…”

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Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout

et al. 2017

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The negatively-charged silicon-vacancy (SiV − ) color center in diamond has recently emerged as a promising system for quantum photonics. Its symmetry-protected optical transitions enable creation of indistinguishable emitter arrays and deterministic coupling to nanophotonic devices. Despite this, the longest coherence time associated with its electronic spin achieved to date (∼ 250 ns) has been limited by coupling to acoustic phonons. We demonstrate coherent control and suppression of phonon-induced dephasing of the SiV − electronic spin coherence by five orders of magnitude by operating at temperatures below 500 mK. By aligning the magnetic field along the SiV − symmetry axis, we demonstrate spin-conserving optical transitions and single-shot readout of the SiV − spin with 89% fidelity. Coherent control of the SiV − spin with microwave fields is used to demonstrate a spin coherence time T2 of 13 ms and a spin relaxation time T1 exceeding 1 s at 100 mK. These results establish the SiV − as a promising solid-state candidate for the realization of quantum networks.Quantum networks require the ability to store quantum information in long-lived memories, to efficiently interface these memories with optical photons and to provide quantum nonlinearities required for deterministic quantum gate operations [1,2]. Even though key building blocks of quantum networks have been demonstrated in various systems [3,4], no solid-state platform has satisfied these requirements. Over the past decade, solid-state quantum emitters with stable spin degrees of freedom such as charged quantum dots and nitrogenvacancy (NV) centers in diamond have been investigated for the realization of quantum network nodes [5]. While quantum dots can be deterministically interfaced with optical photons [6], their quantum memory time is limited to the µs scale [7] due to interactions with their surrounding nuclear spin bath. In contrast, NV centers have an exceptionally long-lived quantum memory [8] but suffer from weak, spectrally unstable optical transitions [9]. Despite impressive proof-of-concept experimental demonstrations with these systems [10,11], scaling to a large number of nodes is limited by the challenge of identifying suitable quantum emitters with the combination of strong, homogeneous and coherent optical transitions and long-lived quantum memories.The negatively-charged silicon-vacancy (SiV − ) has recently been shown to have bright, narrowband optical transitions with a small inhomogeneous broadening [12,13]. The optical coherence of the SiV − is protected by its inversion symmetry [14], even in nanostructures [15]. These optical properties were recently used to show strong interactions between single photons and single SiV − centers and to probabilistically entangle two SiV − centers in a single nanophotonic device [16]. At 4 K, however, the SiV − spin coherence is limited to ∼ 100 ns due to coupling to the phonon bath, mediated by the spin-orbit interaction [17][18][19][20][21].In this Letter, we demonstrate high-fidelity coherent ...

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Ultrafast all-optical coherent control of single silicon vacancy colour centres in diamond

Cited by 112 publications

References 29 publications

Fiber-Coupled Diamond Quantum Nanophotonic Interface

Fiber-Coupled Diamond Quantum Nanophotonic Interface

Material platforms for integrated quantum photonics

Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout

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