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Quantum interference between the optical Stark effect and resonant harmonic generation in WS 2
An applied field can modulate optical signals by resonance shifting via the Stark effect. The optical Stark effect uses ultrafast light in the transparency region of a material to shift resonances with speeds limited by the pulse duration or system coherence. In this Rapid Communication, we investigate the optical Stark effect in resonant optical harmonic generation using the A exciton transition of WS 2 . Multidimensional pump-harmonic-probe measurements, in which the probe is second- or third-harmonic emission, reveal not only large Stark shifts that are commensurate with the large optical susceptibilities common to WS 2 excitons, but also behaviors more complex than simple optical Stark effect treatments predict. We show how another manifestation of the Stark effect, brought forth by coherent photon exchange between the pump and harmonic generation fundamental fields, can strongly enhance or suppress harmonic generation.
Di-Higgs boson peaks and top valleys: Interference effects in Higgs sector extensions
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Interference between the atmospheric and solar oscillation amplitudes
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New interference effects from light gauge bosons in neutrino-electron scattering
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Interference and oscillation in Nambu quantum mechanics
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General analysis for observing quantum interference at colliders
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Neutrino oscillations at JUNO, the Born rule, and Sorkin’s triple path interference
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Illuminating nucleon-gluon interference via calorimetric asymmetry
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Interference effects and the use of Higgs boson pair production to study the Higgs trilinear self-coupling
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Signatures of Fermi Arcs in the Quasiparticle Interferences of the Weyl Semimetals TaAs and NbP
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Obstruction and Interference in Low-Energy Models for Twisted Bilayer Graphene
The electronic bands of twisted bilayer graphene (TBLG) with a large-period moiré superlattice fracture to form narrow Bloch minibands that are spectrally isolated by forbidden energy gaps from remote dispersive bands. When these gaps are sufficiently large, one can study a band-projected Hamiltonian that correctly represents the dynamics within the minibands. This inevitably introduces nontrivial geometrical constraints that arise from the assumed form of the projection. Here we show that this choice has a profound consequence in a low-energy experimentally observable signature that therefore can be used to tightly constrain the analytic form of the appropriate low-energy theory. Additionally, we find that this can be accomplished by a careful analysis of the electron density produced by backscattering of Bloch waves from an impurity potential localized on the moiré superlattice scale. We provide numerical estimates of the effect that can guide experimental work to clearly discriminate between competing models for the low-energy band structure.
Quantum Interference in Jet Substructure from Spinning Gluons
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