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Articles by V. Fatemi
Microwave Susceptibility Observation of Interacting Many-Body Andreev States
Abstract Electrostatic charging affects the many-body spectrum of Andreev states, yet its influence on their microwave properties has not been elucidated. We developed a circuit quantum electrodynamics probe that, in addition to transition spectroscopy, measures the microwave susceptibility of different states of a semiconductor nanowire weak link with a single dominant (spin-degenerate) Andreev level.
Distinguishing Parity-Switching Mechanisms in a Superconducting Qubit
Abstract Single-charge tunneling is a decoherence mechanism affecting superconducting qubits, yet the origin of excess quasiparticle excitations (QPs) responsible for this tunneling in superconducting devices is not fully understood. We measure the flux dependence of charge-parity (or, simply, “parity”) switching in an offset-charge-sensitive transmon qubit to identify the contributions of photon-assisted parity switching and QP generation to the overall parity-switching rate.
Author Correction: Continuous monitoring of a trapped superconducting spin
Correction to: Nature Physics https://doi.org/10.1038/s41567-020-0952-3, published online 6 July 2020.
Continuous monitoring of a trapped superconducting spin
Abstract Readout and control of electrostatically confined electrons in semiconductors are key primitives of quantum information processing with solid-state spin qubits1,2. In superconductor–semiconductor heterostructures, localized electronic modes known as Andreev levels result from confinement that is provided by the pair potential3,4. Unlike electronic modes confined exclusively via electrostatic effects, Andreev levels carry supercurrent.
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