Search Results - "Malpuech, G."
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Measurement of the quantum geometric tensor and of the anomalous Hall drift
Published in Nature (London) (20-02-2020)“…Topological physics relies on the structure of the eigenstates of the Hamiltonians. The geometry of the eigenstates is encoded in the quantum geometric tensor…”
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Effective Theory of Nonadiabatic Quantum Evolution Based on the Quantum Geometric Tensor
Published in Physical review letters (09-07-2018)“…We study the role of the quantum geometric tensor (QGT) in the evolution of two-band quantum systems. We show that all its components play an important role on…”
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Kibble-Zurek Mechanism in Topologically Nontrivial Zigzag Chains of Polariton Micropillars
Published in Physical review letters (29-01-2016)“…We consider a zigzag chain of coupled micropillar cavities, taking into account the polarization of polariton states. We show that the TE-TM splitting of…”
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Robust quantum valley Hall effect for vortices in an interacting bosonic quantum fluid
Published in Nature communications (28-09-2018)“…Topologically protected pseudospin transport, analogous to the quantum spin Hall effect, cannot be strictly implemented for photons and in general bosons…”
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Polariton Z topological insulator
Published in Physical review letters (20-03-2015)“…We demonstrate that honeycomb arrays of microcavity pillars behave as an optical-frequency two-dimensional photonic topological insulator. We show that the…”
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Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons
Published in Physical review letters (21-03-2014)“…Two-dimensional lattices of coupled micropillars etched in a planar semiconductor microcavity offer a workbench to engineer the band structure of polaritons…”
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Chirality of Topological Gap Solitons in Bosonic Dimer Chains
Published in Physical review letters (13-01-2017)“…We study gap solitons which appear in the topological gap of 1D bosonic dimer chains within the mean-field approximation. We find that such solitons have a…”
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Spin-orbit coupling and the optical spin Hall effect in photonic graphene
Published in Physical review letters (16-01-2015)“…We study the spin-orbit coupling induced by the splitting between TE and TM optical modes in a photonic honeycomb lattice. Using a tight-binding approach, we…”
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Optically controlling the emission chirality of microlasers
Published in Nature photonics (01-04-2019)“…Orbital angular momentum (OAM) carried by helical light beams is an unbounded degree of freedom that offers a promising platform in modern photonics. So far,…”
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Exciton–polaritons in van der Waals heterostructures embedded in tunable microcavities
Published in Nature communications (08-10-2015)“…Layered materials can be assembled vertically to fabricate a new class of van der Waals heterostructures a few atomic layers thick, compatible with a wide…”
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Macroscopic quantum self-trapping and Josephson oscillations of exciton polaritons
Published in Nature physics (01-05-2013)“…The Josephson effects that arise when two quantum states are coupled through a barrier are difficult to observe in optical systems because photon–photon…”
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Measuring the quantum geometric tensor in two-dimensional photonic and exciton-polariton systems
Published in Physical review. B, Condensed matter and materials physics (15-05-2018)Get full text
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Optical valley Hall effect based on transitional metal dichalcogenide cavity polaritons
Published in Physical review. B, Condensed matter and materials physics (18-10-2017)Get full text
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Topological optical isolator based on polariton graphene
Published in Applied physics letters (15-01-2018)“…We propose a scheme of a topological optical isolator based on the quantum anomalous Hall effect with strongly coupled exciton-polaritons in a patterned GaAs…”
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Spontaneous formation and optical manipulation of extended polariton condensates
Published in Nature physics (01-11-2010)“…Cavity exciton-polaritons (polaritons) are bosonic quasi-particles offering a unique solid-state system for investigating interacting condensates. Up to now,…”
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Valley coherent exciton-polaritons in a monolayer semiconductor
Published in Nature communications (15-11-2018)“…Two-dimensional transition metal dichalcogenides (TMDs) provide a unique possibility to generate and read-out excitonic valley coherence using linearly…”
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Giant effective Zeeman splitting in a monolayer semiconductor realized by spin-selective strong light–matter coupling
Published in Nature photonics (01-09-2022)“…Strong coupling between light and the fundamental excitations of a two-dimensional electron gas (2DEG) is of foundational importance both to pure physics and…”
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Spin-Orbit Coupling for Photons and Polaritons in Microstructures
Published in Physical review. X (25-03-2015)“…We use coupled micropillars etched out of a semiconductor microcavity to engineer a spin-orbit Hamiltonian for photons and polaritons in a microstructure. The…”
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Valley-addressable polaritons in atomically thin semiconductors
Published in Nature photonics (01-08-2017)“…Researchers excite valley-addressable polaritons in MoSe 2 incorporated in a photonic microcavity. Understanding of the valley pseudospin retention is revealed…”
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