High-fidelity universal quantum gates through quantum interference

TL;DR

This paper demonstrates that twisted rapid passage can implement a universal set of high-fidelity quantum gates with error probabilities below 10^-4, using a single control field type, promising for fault-tolerant quantum computing.

Contribution

The study introduces a method to realize a universal set of quantum gates with high fidelity using twisted rapid passage, a non-adiabatic control technique, with all gates driven by a single control field.

Findings

Error probability for each gate < 10^-4

All gates driven by a single control field

Potential for fault-tolerant quantum computing

Abstract

Twisted rapid passage is a type of non-adiabatic rapid passage that gives rise to controllable quantum interference effects that were first observed experimentally in 2003. We show that twisted rapid passage sweeps can be used to implement a universal set of quantum gates that operate with high-fidelity. For each gate in the universal set, sweep parameter values are provided which simulations indicate will yield a quantum gate with error probability P_{e} < 10**(-4). Note that all gates in this universal set are driven by a **single** type of control field (twisted rapid passage), and the error probability for each gate falls below the rough-and-ready estimate for the accuracy threshold P_{a} ~ 10**(-4). The simulations suggest that the universal gate set produced by twisted rapid passage shows promise for use in a fault-tolerant scheme for quantum computing.