2016/02/28 by Рамаз Хомерики, Ramaz Khomeriki, Sergej Flach · 1 citation
Engineering · Physics and Astronomy · #Bloch oscillations #Bloch wave #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dispersion (optics) #Electronic band structure #Gapless playback #Mechanical and Optical Resonators #Photonic and Optical Devices #Physics #Quantum mechanics #Quantum tunnelling #Wave packet #Zener diode #cond-mat.dis-nn #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.116.245301
published as Phys. Rev. Lett. 116, 245301 (2016) · 5 pages, 6 figures
arxiv created 2016/02/28 · openalex publication_date 2016/06/15 · arxiv updated 2016/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Sinusoidal Bloch oscillations appear in band structures exposed to external fields. Landau-Zener (LZ) tunneling between different bands is usually a counteracting effect limiting Bloch oscillations. Here we consider a flat band network with two dispersive and one flat band, e.g., for ultracold atoms and optical waveguide networks. Using external synthetic gauge and gravitational fields we obtain a perturbed yet gapless band structure with almost flat parts. The resulting Bloch oscillations consist of two parts-a fast scan through the nonflat part of the dispersion structure, and an almost complete halt for substantial time when the atomic or photonic wave packet is trapped in the original flat band part of the unperturbed spectrum, made possible due to LZ tunneling.