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5 papers · 2 filters
Wavefront dislocations reveal the topology of quasi-1D photonic insulators
C. Dutreix, M. Bellec, P. Delplace +1
Phase singularities appear ubiquitously in wavefields, regardless of the wave equation. Such topological defects can lead to wavefront dislocations, as observed in a humongous numb…
Calibrated force measurement in Atomic Force Microscopy using the Transient Fluctuation Theorem
Samuel Albert, Aubin Archambault, Artyom Petrosyan +3
The Transient Fluctuation Theorem is used to calibrate an Atomic Force Microscope by measuring the fluctuations of the work performed by a time dependent force applied between a co…
Topological swing in Bloch oscillations
L. K. Upreti, C. Evain, S. Randoux +3
We report new oscillations of wavepackets in quantum walks subjected to electric fields, that decorate the usual Bloch-Zener oscillations of insulators. The number of turning point…
Quantum tomography of electrical currents
R. Bisognin, A. Marguerite, B. Roussel +12
In quantum nanoelectronics, time-dependent electrical currents are built from few elementary excitations emitted with well-defined wavefunctions. However, despite the realization o…
Topological chiral interface states beyond insulators
Lavi K. Upreti, P. Delplace
We show how to engineer a chiral spectral flow of interface states in a gapless system. Although the bulk bands touch -- thus making the topological indices of the bands ill-define…