Gabriele Campagnano

Full counting statistics of noncommuting variables: The case of spin counts

We discuss the full counting statistics FCS of noncommuting variables with the measurement of successive spin counts in noncollinear directions taken as an example. We show that owing to an irreducible detector back action, the FCS in this case may be sensitive to the dynamics of the detectors, and may differ from the predictions obtained with using a naive version of the projection postulate. We present here a general model of detector dynamics and path-integral approach to the evaluation of FCS. We concentrate further on a simple “diffusive” model of the detector dynamics where the FCS can be evaluated with transfer-matrix method. The resulting probability distribution of spin counts is characterized by anomalously large higher cumulants and substantially deviates from Gaussian statistics.

Persistent current and zero-energy Majorana modes in a p-wave disordered superconducting ring

We discuss the emergence of zero-energy Majorana modes in a disordered finite-length p-wave one-dimensional superconducting ring, pierced by a magnetic flux

Transfer matrix approach to the persistent current in quantum rings: Application to hybrid normal-superconducting rings

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Topological Defects in Topological Insulators and Bound States at Topological Superconductor Vortices

tuned at an appropriate value

GQ corrections in the circuit theory of quantum transport

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Josephson current in a quantum dot in the Kondo regime connected to two superconductors

. In the absence of fermion parity conservation, we evidence the emergence of the Majorana modes by looking at the discontinuities in the persistent current

High critical temperature nodal superconductors as building block for time-reversal invariant topological superconductivity

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Junction of three off-critical quantum Ising chains and two-channel Kondo effect in a superconductor

at

Statistics of transmission eigenvalues for a disordered quantum point contact

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Transmission Eigenvalues’ Statistics for a Quantum Point Contact

. By monitoring the discontinuities in