Observation of supersymmetric pseudo-Landau levels in strained microwave graphene

Abstract

Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice, we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field strength. This is achieved by utilizing an adaptable set-up in a geometry that is compatible with the pseudo-Landau levels at all field strengths. The adopted approach enables to observe fully formed flat-band pseudo-Landau levels spectrally as sharp peaks in the photonic density of states, and image the associated wavefunctions spatially, where we provide clear evidence for a characteristic nodal structure reflecting the previously elusive supersymmetry in the underlying low-energy theory. In particular, we resolve the full sublattice polarization of the anomalous 0th pseudo-Landau level, which reveals a deep connection to zigzag edge states in the unstrained case.

7 pages, 3 figures

References in corpus (9)

• The electronic properties of graphene
• Observation of a localized flat-band state in a photonic Lieb lattice
• Selective enhancement of topologically induced interface states in a dielectric resonator chain
• Tuning the pseudospin polarization of graphene by a pseudo-magnetic field
• Parity anomaly and Landau-level lasing in strained photonic honeycomb lattices
• Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices
• Strain-induced Landau Levels in arbitrary dimensions with an exact spectrum
• Degeneracy doubling and sublattice polarization in strain-induced pseudo-Landau levels
• Self-Shielded Topological Receiver Protectors

Cited by in corpus (15)

• Direct observation of photonic Landau levels and helical edge states in strained honeycomb lattices
• Coherent control of quantum topological states of light in Fock-state lattices
• Realization of all-band-flat photonic lattices
• Photonic realization of a generic type of graphene edge states exhibiting topological flat band
• Landau levels in strained two-dimensional photonic crystals
• Gauge Field Induced Chiral Zero Mode in Five-dimensional Yang Monopole Metamaterials
• Three-dimensional flat Landau levels in an inhomogeneous acoustic crystal
• Strain and pseudo-magnetic fields in optical lattices from density-assisted tunneling
• Interplay of quantum phase transition and flat band in hybrid lattices
• Pseudomagnetic suppression of non-Hermitian skin effect
• Pseudo-magnetic fields in square lattices
• Solitons induced by an in-plane magnetic field in rhombohedral multilayer graphene
• Quantized crystalline-electromagnetic responses in insulators
• Quantized valley Hall response from local bulk density variations
• Flux-induced midgap states between strain-engineered flat bands