10 papers
Fragile single-cone Dirac quantum walks in two dimensions
C. W. J. Beenakker, J. Sánchez Férnan, J. Sánchez Férnan +2
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. Sánchez Fernán +2
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. TworzydÅo, 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…
Cross-platform certification of the qubit space with a minimal number of parameters
Tomasz Rybotycki, Tomasz BiaÅecki, Josep Batle +2
We demonstrate a determinant dimension witness of a qubit space. Our test has a minimal number of independent parameters. We achieve it by mapping the Bloch sphere -rotation…
Helical Luttinger liquid on a space-time lattice
V. A. Zakharov, J. Tworzydlo, C. W. J. Beenakker +1
The Luttinger model is a paradigm for the breakdown due to interactions of the Fermi liquid description of one-dimensional massless Dirac fermions. Attempts to discretize the model…