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Showing 1–9 of 9 results
Advanced filters: Author: Falk Eilenberger Clear advanced filters

  • Spontaneous parametric down-conversion in thin films should allow to realise extremely compact entangled photon sources. Here, the authors generate entangled photon pairs from a 3R-MoS2 flake, characterize them via quantum state tomography, and show how to tune between different Bell state outputs by changing the pump polarization.

    • Maximilian A. Weissflog
    • Anna Fedotova
    • Falk Eilenberger
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • The authors investigate spin-valley polarization in hybrid systems of Au nanoparticles and monolayer MoS2 and observe a nearly complete quenching of the far-field circular polarization state of emission from MoS2 at the position of the nanoparticle. This highlights the need to consider an ensemble, rather than just a single rotating dipole emitter, for precise predictions of polarization responses in these hybrid systems.

    • Tobias Bucher
    • Zlata Fedorova
    • Isabelle Staude
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • Multi-parameter metrology requires collective measurements on more than one copy of the same quantum state. Now, an optimal scheme for the estimation of qubit rotations has been demonstrated on superconducting and trapped-ion platforms.

    • Lorcán O. Conlon
    • Tobias Vogl
    • Syed M. Assad
    ResearchOpen Access
    Nature Physics
    Volume: 19, P: 351-357

  • Here, the authors show brightening of dark excitons by strong coupling between cavity photons and high energy, spin-allowed, bright excitons in monolayer WSe2. In this regime, the commonly observed photoluminescence quenching stemming from the fast relaxation to the dark ground state is prevented.

    • Hangyong Shan
    • Ivan Iorsh
    • Christian Schneider
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Here, the authors show that the interaction between microcavity photons and excitons in an atomically thin WSe2 results in a hybridized regime of strong light-matter coupling. Coherence build-up is accompanied by a threshold-like behaviour of the emitted light intensity, which is a fingerprint of a polariton laser effect.

    • Hangyong Shan
    • Lukas Lackner
    • Carlos Antón-Solanas
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Non-orthogonal quantum states cannot be perfectly distinguished - a fact of central importance in quantum mechanics, from both a fundamental and practical viewpoint. The authors introduce an approach to this problem, using entangled measurements to distinguish quantum states better than what is possible with direct measurements.

    • Lorcán O. Conlon
    • Falk Eilenberger
    • Syed M. Assad
    ResearchOpen Access
    Communications Physics
    Volume: 6, P: 1-8