Research Topics

We specialise on quantum transport in superconducting devices, describing the pertinent physics by means of various theoretical techniques (circuit QED, bosonization, renormalisation group, scattering formalism, differential geometry, etc). On a conceptual level, we develop new types of circuit elements or revise the description of existing ones (such as resistors, nonlinear capacitors, nonreciprocal and geometric effects in multiport devices), and connect their behaviour to emergent phenomena known from other areas of quantum field theory (e.g., fractional charges, abelian and non-abelian anyons, quantum gravity). We furthermore explore dissipative and topological phase transitions in circuits out of equilibrium.

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