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Yelin, Susanne

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Yelin

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Susanne

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Yelin, Susanne

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2010 - 20205

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Author's Publications: search.filters.isAuthorOfPublication.d4cb1da6-a680-4726-a10e-f575c9a06cdb

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    Quantum Metasurfaces with Atom Arrays
    (Springer Science and Business Media LLC, 2020-03-30) Bekenstein, Rivka; Pikovski, Igor; Pichler, Hannes; Shahmoon, E.; Yelin, Susanne; Lukin, M. D.
    Metasurfaces mold the flow of classical light waves by engineering sub-wavelength patterns from dielectric or metallic thin films. We introduce and analyze a method in which quantum operator-valued reflectivity can be used to control both spatio-temporal and quantum properties of transmitted and reflected light. Such quantum metasurfaces are realized by entangling the macroscopic response of atomically thin atom arrays to light. We show that such a system allows for parallel quantum operations between atoms and photons as well as for the generation of highly entangled photonic states such as photonic GHZ and three-dimensional cluster states suitable for quantum information processing. We analyze the influence of imperfections as well as specific implementations based on atom arrays excited into Rydberg states
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    Dissipative phase transition in a central spin system
    (American Physical Society (APS), 2012) Kessler, E. M.; Giedke, G.; Imamoglu, A.; Yelin, Susanne; Lukin, Mikhail; Cirac, J. I.
    We investigate dissipative phase transitions in an open central spin system. In our model the central spin interacts coherently with the surrounding many-particle spin environment and is subject to coherent driving and dissipation. We develop analytical tools based on a self-consistent Holstein-Primakoff approximation that enable us to determine the complete phase diagram associated with the steady states of this system. It includes first and second-order phase transitions, as well as regions of bistability, spin squeezing and altered spin pumping dynamics. Prospects of observing these phenomena in systems such as electron spins in quantum dots or NV centers coupled to lattice nuclear spins are briefly discussed.
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    Optical Superradiance from Nuclear Spin Environment of Single-Photon Emitters
    (American Physical Society (APS), 2010) Kessler, Eric; Yelin, Susanne; Lukin, Mikhail; Cirac, J. I.; Giedke, G.
    We show that superradiant optical emission can be observed from the polarized nuclear spin ensemble surrounding a single-photon emitter such as a single quantum dot or nitrogen-vacancy center. The superradiant light is emitted under optical pumping conditions and would be observable with realistic experimental parameters.
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    Quantum interference between independent reservoirs in open quantum systems
    (American Physical Society (APS), 2014) Chan, Ching-Kit; Lin, Guin-Dar; Yelin, Susanne; Lukin, Mikhail
    When a quantum system interacts with multiple reservoirs, the environmental effects are usually treated in an additive manner. We show that this assumption breaks down for non-Markovian environments that have finite memory times. Specifically, we demonstrate that quantum interferences between independent environments can qualitatively modify the dynamics of the physical system. We illustrate this effect with a two-level system coupled to two structured photonic reservoirs, discuss its origin using a nonequilibrium diagrammatic technique, and show an example when the application of this interference can result in an improved dark state preparation in a Λ system.
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    Nuclear Spin Cooling Using Overhauser-Field Selective Coherent Population Trapping
    (American Physical Society, 2010) Issler, Mena; Kessler, Eric M.; Giedke, Geza; Yelin, Susanne; Cirac, Ignacio; Lukin, Mikhail; Imamoglu, Atac
    We show that a quantum interference effect in optical absorption from two electronic spin states of a solid-state emitter can be used to prepare the surrounding environment of nuclear spins in well-defined states, thereby suppressing electronic spin dephasing. The coupled electron-nuclei system evolves into a coherent population trapping state by optical-excitation-induced nuclear-spin diffusion for a broad range of initial optical detunings. The spectroscopic signature of this evolution where the single-electron strongly modifies its environment is a drastic broadening of the dark resonance in optical absorption experiments. The large difference in electronic and nuclear time scales allows us to verify the preparation of nuclear spins in the desired state.