Quantum control of photonic entanglement with a single sub-wavelength structure

Abstract

Quantum entanglement is the basic resource for most quantum information schemes. A fundamental problem of using photonic states as carriers of quantum information is that they interact weakly with matter and that the interaction volume is typically limited by the wavelength of light. The use of metallic structures in quantum plasmonics has the potential to alleviate these problems. Here, we present the first results showing that a single subwavelength plasmonic nanoaperture can controllably modify the quantum state of light. In particular, we experimentally demonstrate that two-photon entanglement can be either completely preserved or completely lost after the interaction with the nanoaperture solely depending on the relative phase between the quantum states. We achieve this effect by using a specially engineered two photon state to match the properties of the nanoaperture. The effect is fundamentally mediated by quantum interference which occurs at scales smaller than the wavelength of light. This connection between nano-photonics and quantum optics not only demonstrates an unprecedented control over light-matter interaction in the quantum limit, but also probes the fundamental limits of the phenomenon of quantum interference.

References in corpus (9)

• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
• Quantum information transfer using photons
• Experimental Scattershot Boson Sampling
• Universal Quantum Computation in Waveguide QED using Decoherence Free Subspaces
• Coalescence and anti-coalescence of surface plasmons on a lossy beamsplitter
• Angular momentum-induced circular dichroism in non-chiral nanostructures
• Quantum optical realization of arbitrary linear transformations allowing for loss and gain
• Deterministic Sub-wavelength Control of Light Confinement in Nanostructures

Cited by in corpus (10)

• Air-core fiber distribution of hybrid vector vortex-polarization entangled states
• Tunable two-photon quantum interference of structured light
• Observation of the Modification of Quantum Statistics of Plasmonic Systems
• Nonlinear Nanoresonators for Bell State Generation
• Symmetry-protection of multiphoton states of light
• Entanglement generation via diffraction
• Many-Body Entanglement in Solid-State Emitters
• A Tensor Product Space for Studying the Interaction of Bipartite States of Light with Nanostructures
• Preservation and destruction of the purity of two-photon states in the interaction with a nanoscatterer
• Bandwidth control of the biphoton wavefunction exploiting spatio-temporal correlations