Maxime Hugues

Publications (3)7.4 Total impact

• Article: Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source.

  Clemens Matthiesen, Martin Geller, Carsten H H Schulte, Claire Le Gall, Jack Hansom, Zhengyong Li, Maxime Hugues, Edmund Clarke, Mete Atatüre
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  ABSTRACT: Resonance fluorescence in the Heitler regime provides access to single photons with coherence well beyond the Fourier transform limit of the transition, and holds the promise to circumvent environment-induced dephasing common to all solid-state systems. Here we demonstrate that the coherently generated single photons from a single self-assembled InAs quantum dot display mutual coherence with the excitation laser on a timescale exceeding 3 s. Exploiting this degree of mutual coherence, we synthesize near-arbitrary coherent photon waveforms by shaping the excitation laser field. In contrast to post-emission filtering, our technique avoids both photon loss and degradation of the single-photon nature for all synthesized waveforms. By engineering pulsed waveforms of single photons, we further demonstrate that separate photons generated coherently by the same laser field are fundamentally indistinguishable, lending themselves to the creation of distant entanglement through quantum interference.
  Nature Communications 03/2013; 4:1600. · 7.40 Impact Factor
• Article: Phase-locked flying qubits with synthesized waveforms

  Clemens Matthiesen, Martin Geller, Carsten H. H. Schulte, Claire Le Gall, Jack Hansom, Zhengyong Li, Maxime Hugues, Edmund Clarke, Mete Atatüre
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  ABSTRACT: Significant progress has been reported within quantum information science for quantum-dot spins as stationary qubits including long spin coherence times and ultrafast optical manipulation capabilities. A successful realization of a solid-state quantum network relies on quantum-optical coupling of distributed spins. The quality of photons as flying qubits, however, remained systematically below par due to detrimental effects of the solid-state environment on the photon generation process casting a major challenge on this roadmap today. Recently, the coherent component of resonance fluorescence has been observed from a single quantum dot promising a fully coherent single photon scattering channel for interfacing spins and photons with suppressed environment effects. Here, we first demonstrate that the coherently generated single photons display mutual coherence with the excitation laser on a timescale exceeding 3 seconds. Exploiting this degree of mutual coherence we synthesize near-arbitrary single photon wavepackets by controlling the waveform of the excitation laser field. Fundamentally differing from post-emission filtering, our technique circumvents both photon loss and degradation of the single photon nature for all synthesized waveforms. We further demonstrate that separate photons generated coherently by the same laser field are fundamentally indistinguishable. Photons generated from spin-selective transitions will allow the realization of a high-fidelity spin-photon interface, as well as a distributed quantum network comprising even disparate nodes.
  08/2012;
• Article: Interfacing a quantum dot spin with a photonic circuit

  Isaac J. Luxmoore, Nicholas A. Wasley, Andrew J. Ramsay, Arthur C. T. Thijssen, Ruth Oulton, Maxime Hugues, Sachin Kasture, Achanta V. Gopal, A. Mark Fox, Maurice S. Skolnick
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  ABSTRACT: A scalable optical quantum information processor is likely to be a waveguide circuit with integrated sources, detectors, and either deterministic quantum-logic or quantum memory elements. With microsecond coherence times, ultrafast coherent control, and lifetime-limited transitions, semiconductor quantum-dot spins are a natural choice for the static qubits. However their integration with flying photonic qubits requires an on-chip spin-photon interface, which presents a fundamental problem: the spin-state is measured and controlled via circularly-polarised photons, but waveguides support only linear polarisation. We demonstrate here a solution based on two orthogonal photonic nanowires, in which the spin-state is mapped to a path-encoded photon, thus providing a blue-print for a scalable spin-photon network. Furthermore, for some devices we observe that the circular polarisation state is directly mapped to orthogonal nanowires. This result, which is physically surprising for a non-chiral structure, is shown to be related to the nano-positioning of the quantum-dot with respect to the photonic circuit.
  06/2012;