Working Group 4
The working group 4 (WG4) of this COST Action is focused on the investigation of cooperative effects, correlations, and many-body physics tailored by strongly confined fields in nanophotonic and plasmonic systems. Topics include:
Photonic Quantum Simulation: engineering strongly coupled photonic many-body systems,
analytic and numerical techniques for treating driven-dissipative many-body systems, plasmonic and nanophotonic lattices, …
Atom-Light Interactions in 1D: superradiance and self-ordering in 1D, efficient coupling of atoms, molecules, defect centers and quantum dots to plasmonic and photonic waveguides, physics of epsilon-near-zero (ENZ) and chiral waveguides, …
Collective Effects & Phase Transitions: Dicke and self-organization phase transitions, cavity QED with atomic or spin ensembles, strong and ultra-strong coupling effects in cavity QED, …
Quantum Plasmonics: strong plasmonic nonlinearities, plasmonic lattices and graphene plasmonics, efficient molecule-plasmon coupling and energy transfer, quantum statistics of plasmonic excitations, …
Nano-Optomechanics: strong coupling optomechanics in nano-OM systems, OM generation of nonclassical states and entanglement for photons and phonons, graphene-based OM systems, …
The goal of WG4 is to connect theorists and experimental researchers working at the interface between quantum optics and many-body physics and to stimulate interdisciplinary collaborations through meetings, training schools and short term scientific missions (STSM).
Objective | Photonic Quantum Simulation |
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Theoretical approaches | – schemes for engineering strongly coupled photonic many-body systems,effective gauge fields, non-trivial topologies – new numerical methods for driven-dissipative many-body systems: MPS (1D), corner-space renormalization (2D) – ultrastrong coupling theory for atom-waveguide systems – theory of plasmonic condensates |
Experimental approaches | – plasmonic lattice systems |
Goals | – optimized / flexible numerical methods for open quantum many-body systems – optical/plasmonic lattice systems with non-linearities exceeding losses |
Objective | Atom-Light Interactions in 1D |
Theoretical approaches | – theory of self-ordering in driven 1 D atom-waveguide systems – new proposal for superradiance/correlated decay between SiV centres in diamond waveguides – realistic predictions for photon transport in slow-light waveguides – strong light-matter interactions in slow-light waveguides |
Experimental approaches | -QD-pillar systems and free-space lensing for efficient emitter-photon coupling – design of chiral photonic crystal waveguides with unidirectional coupling – epsilon-near-zero (ENZ) medium for unconventional (position independent) dipole-dipole interactions – bright single molecule emitters and SiV – long-distance coupling of two separated quantum dots in 2D photonic crystal structures |
Goals | – combining chiral or ENZ waveguides with QDs or other emitters – coupling of molecules to hybrid (plasmonic/dielectric)waveguides |
Objective | Collective Effects & Phase Transitions |
Theoretical approaches | – Dicke phase transition and self-organization in cavatiy QED, relaxation dynamics and prethermalization – QPT and universal dynamics in the single atom Rabi model – cavity protection effects and decoherence control of atomic/spin ensemble quantum memories – Green’s tensor approach to model superradiance of many random emitters coupled to plasmonic resonances – hydrodynamical models for quantum plasmas in semiconductors |
Experimental approaches | |
Goals | – super-radiation and control of coherence with ENZ mediums |
Objective | Quantum Plasmonics |
Theoretical approaches | – non-linear effects in organic “plasmonics” – exciton compensation of Coulomb blocking the current through conduction nanjunctions – modeling of plasmons in nano-graphene sheets – pseudoparticle nonequilibrium Green function formalism for exact treating the coupling between plasmons and excitons |
Experimental approaches | – plasmon induced non-linearities in nanostructured graphene – plasmonic lattices – demonstration of particle-wave duality for plasmons – strong coupling between SPP and molecules – plasmon chemistry – plasmon assisted energy transfer |
Goals | – increase life plasmon lifetime – enhanced plasmonic non-linearites using near-field effects |
Objective | Nano-Optomechanics |
Theoretical approaches | – conditioned preparation of non-classical mechanical states and entanglement for weakly coupled OM systems – modeling of mechanical properties of carbon nanotubes |
Experimental approaches | – Near-field dissipative coupling of graphene resonators to single emitters |
Goals | – demonstrate coherent near-field optomechanical coupling with graphene |