Non-Bloch-Band Collapse and Chiral Zener Tunneling

Longhi, Stefano
Physical Review Letters 124, 066602 (1-7) (2020)

Non-Bloch-band theory describes bulk energy spectra and topological invariants in non-Hermitian
crystals with open boundaries, where the bulk eigenstates are squeezed toward the edges (skin effect).
However, the interplay of non-Bloch-band theory, skin effect, and coherent Bloch dynamics is so far
unexplored. In two-band non-Hermitian lattices, it is shown here that collapse of non-Bloch bands and skin
modes deeply changes the Bloch dynamics under an external force. In particular, for resonance forcing
non-Bloch-band collapse results in Wannier-Stark ladder coalescence and chiral Zener tunneling between
the two dispersive Bloch bands

Esta web utiliza cookies para la recolección de datos con un propósito estadístico. Si continúas navegando, significa que aceptas la instalación de las cookies.

Más información De acuerdo