Photonics Research, 2020, 8 (10): 10000B15, Published Online: Sep. 29, 2020
Disorder-protected quantum state transmission through helical coupled-resonator waveguides 
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Fig. 1. Temporally indistinguishable photons within the temporal resolution δ t
Fig. 2. Schematic of the helical coupled-resonator optical waveguide (H-CROW). Pseudospin-momentum locking is achieved after a certain propagation distance, where each sublattice exhibits definite momentum for designated circulation mode, thereby facilitating a disorder-resistant transport. As opposite circulations exhibit opposite helicity, two co-propagating channels can be realized.
Fig. 3. Classical wave transport through H-CROWs and CROWs in the presence of moderate disorder U = 0.8 J κ in = 0.1 J ω = 0 L = 20 − 15.8 − 22.8 dB ω = 0 ω = 0 U ω = 0 τ ¯
Fig. 4. (a), (b) Schematics of coincidence measurement using tight-binding models of an H-CROW and a pair of regular CROWs. We consider measurements for two photons exhibiting opposite helicity with controlled delay time τ c
Fig. 5. Disorder-robust transmission of N = 2 exp ( S a ) N exp ( S a ) exp ( S a ) = 2 exp ( S a ) = 1 U = 0.8 J
JungYun Han, Andrey A. Sukhorukov, Daniel Leykam. Disorder-protected quantum state transmission through helical coupled-resonator waveguides[J]. Photonics Research, 2020, 8(10): 10000B15.
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