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Tiecke, Tobias

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Tiecke

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Tobias

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Tiecke, Tobias

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2012 - 20144

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Author's Publications: search.filters.isAuthorOfPublication.abcd33d1-2439-450e-8513-3f4ef05463eb

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Now showing 1 - 4 of 4
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    Coherence and Raman Sideband Cooling of a Single Atom in an Optical Tweezer
    (American Physical Society, 2013) Thompson, Jeffrey Douglas; Tiecke, Tobias; Zibrov, Alexander; Vuletić, V.; Lukin, Mikhail
    We investigate quantum control of a single atom in a tightly focused optical tweezer trap. We show that inevitable spatially varying polarization gives rise to significant internal-state decoherence but that this effect can be mitigated by an appropriately chosen magnetic bias field. This enables Raman sideband cooling of a single atom close to its three-dimensional ground state (vibrational quantum numbers \(\bar n_x=\bar n_y=0.01, \bar n_z=8)\) even for a trap beam waist as small as \(\omega=900  nm\). The small atomic wave packet with \(\delta x=\delta y=24  nm\) and \(\delta z=270  nm\) represents a promising starting point for future hybrid quantum systems where atoms are placed in close proximity to surfaces.
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    Coupling a Single Trapped Atom to a Nanoscale Optical Cavity
    (American Association for the Advancement of Science (AAAS), 2013) Thompson, Jeffrey Douglas; Tiecke, Tobias; de Leon, Nathalie Pulmones; Feist, J.; Akimov, Alexey; Gullans, Michael John; Zibrov, Alexander; Vuletic, V.; Lukin, Mikhail
    Hybrid quantum devices, in which dissimilar quantum systems are combined in order to attain qualities not available with either system alone, may enable far-reaching control in quantum measurement, sensing, and information processing. A paradigmatic example is trapped ultracold atoms, which offer excellent quantum coherent properties, coupled to nanoscale solid-state systems, which allow for strong interactions. We demonstrate a deterministic interface between a single trapped rubidium atom and a nanoscale photonic crystal cavity. Precise control over the atom's position allows us to probe the cavity near-field with a resolution below the diffraction limit and to observe large atom-photon coupling. This approach may enable the realization of integrated, strongly coupled quantum nano-optical circuits.
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    Nanoplasmonic Lattices for Ultracold Atoms
    (American Physical Society (APS), 2012) Gullans, M.; Tiecke, Tobias; Chang, D. E.; Feist, J.; Thompson, J. D.; Cirac, J. I.; Zoller, P.; Lukin, Mikhail
    We propose to use subwavelength confinement of light associated with the near field of plasmonic systems to create nanoscale optical lattices for ultracold atoms. Our approach combines the unique coherence properties of isolated atoms with the subwavelength manipulation and strong light-matter interaction associated with nanoplasmonic systems. It allows one to considerably increase the energy scales in the realization of Hubbard models and to engineer effective long-range interactions in coherent and dissipative many-body dynamics. Realistic imperfections and potential applications are discussed.
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    Nanophotonic quantum phase switch with a single atom
    (Nature Publishing Group, 2014) Tiecke, Tobias; Thompson, Jeffrey Douglas; de Leon, Nathalie Pulmones; Liu, Li; Vuletić, V.; Lukin, Mikhail
    By analogy to transistors in classical electronic circuits, quantum optical switches are important elements of quantum circuits and quantum networks1, 2, 3. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system4, such a switch may enable applications such as long-distance quantum communication5, distributed quantum information processing2 and metrology6, and the exploration of novel quantum states of matter7. Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system in which a single atom switches the phase of a photon and a single photon modifies the atom’s phase. We experimentally demonstrate an atom-induced optical phase shift8 that is nonlinear at the two-photon level9, a photon number router that separates individual photons and photon pairs into different output modes10, and a single-photon switch in which a single ‘gate’ photon controls the propagation of a subsequent probe field11, 12. These techniques pave the way to integrated quantum nanophotonic networks involving multiple atomic nodes connected by guided light.