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Fragile single-cone Dirac quantum walks in two dimensions
C. W. J. Beenakker, J. Sánchez Férnan, J. Tworzydło
It is known that a one-dimensional (1D) quantum walk gives a local space-time discretization of the massless Dirac equation with a single quasi-energy cone (no fermion doubling at…
Monitored chaotic scattering
C. W. J. Beenakker, J. Sánchez Fernán, J. Tworzydło
We extend the random-matrix theory of chaotic scattering to quantum dots whose dynamics is monitored by time-resolved measurements. Starting from a scattering matrix drawn from a c…
Monitored quantum transport through a disordered one-dimensional conductor
J. Sánchez Fernán, J. Tworzydło, C. W. J. Beenakker
We formulate a quantum master equation for the many-particle density matrix of electrons propagating through a single-mode conductor, combining elastic scattering by disorder with…
Landau-Level-Resolved Mode Mixing and Shot Noise in Gate-Defined Graphene Quantum Point Contacts
Shakthidhar Vilvanathan, Jerin Saji, Kristiana Frei +2
Graphene quantum point contacts (QPCs) in the quantum Hall regime host competing transport mechanisms including chiral edge propagation, valley degeneracy, and gate-induced mode mi…