Informal CMTC Seminar - Valla Fatemi

Date
Tue, Mar 31, 2026 11:00 am - 12:00 pm
Location
ATL 4402

Description

Speaker: Valla Fatemi (Cornell University)
Title: Loopless multiterminal quantum circuits at odd parity
Abstract: We will present on a theoretical proposal for loopless multiterminal hybrid superconducting devices at odd fermion parity with time-reversal symmetry. We find that the energy-phase relationship has a double minimum corresponding to opposite windings of the superconducting phases. Spin-orbit coupling adds multi-axial spin splittings, which contrasts with two-terminal devices where spin dependence is uniaxial. Capacitive shunting localizes quantum circuit states in the wells and exponentially suppresses their splitting. For weak spin-orbit strength, the system has a four-dimensional spin-chirality low-energy subspace which can be universally controlled with electric fields only.