8 papers
Pulse-optimised circuit elements for scalable and noise-resilient quantum chemistry
Henrik Gothen, Christopher K. Long, Djamila Hiller +4
Useful chemistry calculations on near-term quantum processors are hindered by current algorithmic runtimes. We develop a methodology to significantly reduce these runtimes. Typical…
Hardware-Tailored Resource Estimation for Magic-State Distillation on Silicon Spin Qubits
Songqinghao Yang, Christopher K. Long, Rubén M. Otxoa +3
We present a resource analysis for generating high-fidelity logical magic states on silicon spin-qubit platforms. We consider a range of architectures, including a shuttling-based…
Quantum metrology enhanced by effective time reversal
Yu-Xin Wang, Flavio Salvati, David R. M. Arvidsson-Shukur +3
Quantum metrology involves the application of quantum resources to enhance measurements. Several communities have developed quantum-metrology strategies that leverage effective tim…
Theory of direct measurement of the quantum pseudo-distribution via its characteristic function
Andrew N. Jordan, David R. M. Arvidsson-Shukur, Aephraim M. Steinberg
We propose a method for directly measuring the quantum mechanical pseudo-distribution of observable properties via its characteristic function. Vandermonde matrices of the eigenval…
QuantGraph: A Receding-Horizon Quantum Graph Solver
Pranav Vaidhyanathan, Aristotelis Papatheodorou, David R. M. Arvidsson-Shukur +3
Dynamic programming is a cornerstone of graph-based optimization. While effective, it scales unfavorably with problem size. In this work, we present QuantGraph, a two-stage quantum…
Superconducting antiqubits achieve optimal phase estimation via unitary inversion
Xingrui Song, Surihan Sean Borjigin, Flavio Salvati +4
A positron is equivalent to an electron traveling backward through time. Casting transmon superconducting qubits as akin to electrons, we simulate a positron with a transmon subjec…