PRB-Rapid: Charge-noise-insensitive gate operations for always-on, exchange-only qubits

We introduce an always-on, exchange-only (AEON) qubit made up of three localized semiconductor spins that offers a true “sweet spot” to fluctuations of the quantum dot energy levels. Both single- and two-qubit gate operations can be performed using only exchange pulses while maintaining this sweet spot. We show how to interconvert this qubit to other three-spin encoded qubits as a resource for quantum computation and communication.

Charge-noise-insensitive gate operations for always-on, exchange-only qubits (aps.org)



Charles Tahan
Physicist in Washington, D.C.