Gap-protected transfer of topological defect states in photonic lattices

Yuan, Jiale; Xu, Chenran; Cai, Han; Wang, Dawei

doi:10.1063/5.0037394

Cited by 20 publications

(4 citation statements)

References 44 publications

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“…Such quantum topological states of bosonic modes provide new tools to design classical photonic lattices for flat-band optical engineering. We note that one-dimensional photonic lattices that mimic the coupling between Fock states for coherent and topological transport have been proposed 65 , 66 and experimentally realized 67 , 68 . Here we extend the technique to two dimensions to realize ABF lattices.…”

Section: Resultsmentioning

confidence: 83%

Realization of all-band-flat photonic lattices

Yang,

Li,

Yang

et al. 2024

Nat Commun

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Flatbands play an important role in correlated quantum matter and have promising applications in photonic lattices. Synthetic magnetic fields and destructive interference in lattices are traditionally used to obtain flatbands. However, such methods can only obtain a few flatbands with most bands remaining dispersive. Here we realize all-band-flat photonic lattices of an arbitrary size by precisely controlling the coupling strengths between lattice sites to mimic those in Fock-state lattices. This allows us to go beyond the perturbative regime of strain engineering and group all eigenmodes in flatbands, which simultaneously achieves high band flatness and large usable bandwidth. We map out the distribution of each flatband in the lattices and selectively excite the eigenmodes with different chiralities. Our method paves a way in controlling band structure and topology of photonic lattices.

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Section: Resultsmentioning

confidence: 83%

Realization of all-band-flat photonic lattices

Yang,

Li,

Yang

et al. 2024

Nat Commun

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“…3 with time-dependent λ1 and λ2. The zero-energy state is topologically protected by the energy gap g0 from other eigenstates of the FSL and maintains coherence during the transport ( 45 ). To show this, we further measure the density matrix of the two resonators by quantum state tomography (Fig.…”

Section: Topological Transportmentioning

confidence: 99%

Observing the quantum topology of light

Deng

Dong

Zhang

et al. 2022

Science

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Topological photonics provides a powerful platform to explore topological physics beyond traditional electronic materials and shows promising applications in light transport and lasers. Classical degrees of freedom are routinely used to construct topological light modes in real or synthetic dimensions. Beyond the classical topology, the inherent quantum nature of light provides a wealth of fundamentally distinct topological states. Here we implement experiments on topological states of quantized light in a superconducting circuit, with which one- and two-dimensional Fock-state lattices are constructed. We realize rich topological physics including topological zero-energy states of the Su-Schrieffer-Heeger model, strain-induced pseudo-Landau levels, valley Hall effect, and Haldane chiral edge currents. Our study extends the topological states of light to the quantum regime, bridging topological phases of condensed-matter physics with circuit quantum electrodynamics, and offers a freedom in controlling the quantum states of multiple resonators.

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“…( 3) with time-dependent λ 1 and λ 2 . The zero-energy state is topologically protected by the energy gap g 0 from other eigenstates of the FSL and maintains coherence during the transport [36]. To show this, we further measure the density matrix of the two resonators by quantum state tomography.…”

Section: Topological Transportmentioning

confidence: 99%

Coherent control of quantum topological states of light in Fock-state lattices

Deng¹,

Dong²,

Zhang³

et al. 2022

Preprint

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Topological photonics provides a novel platform to explore topological physics beyond traditional electronic materials and stimulates promising applications in topologically protected light transport and lasers. Classical degrees of freedom such as polarizations and wavevectors are routinely used to synthesize topological light modes. Beyond the classical regime, inherent quantum nature of light gives birth to a wealth of fundamentally distinct topological states, which offer topological protection in quantum information processing. Here we implement such experiments on topological states of quantized light in a superconducting circuit, on which three resonators are tunably coupled to a gmon qubit. We construct one and two-dimensional Fock-state lattices where topological transport of zero-energy states, strain induced pseudo-Landau levels, valley Hall effect and Haldane chiral edge currents are demonstrated. Our study extends the topological states of light to the quantum regime, bridges topological phases of condensed matter physics with circuit quantum electrodynamics, and offers a new freedom in controlling the quantum states of multiple resonators.

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Gap-protected transfer of topological defect states in photonic lattices

Cited by 20 publications

References 44 publications

Realization of all-band-flat photonic lattices

Realization of all-band-flat photonic lattices

Observing the quantum topology of light

Coherent control of quantum topological states of light in Fock-state lattices

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