7 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…
Towards Exponential Quantum Improvements in Solving Cardinality-Constrained Binary Optimization
Haomu Yuan, Hanqing Wu, Kuan-Cheng Chen +2
Cardinality-constrained binary optimization is a fundamental computational primitive with broad applications in machine learning, finance, and scientific computing. In this work, w…
From virtual Z gates to virtual Z pulses
Christopher K. Long, Crispin H. W. Barnes
Virtual gates have become integral for implementing fast, high-fidelity single-qubit operations. However, virtual gates require that the system's two-qubit gates are microw…
Kirkwood-Dirac Nonpositivity is a Necessary Resource for Quantum Computing
Jonathan J. Thio, Songqinghao Yang, Stephan De Bièvre +2
Classical computers can simulate models of quantum computation with restricted input states. The identification of such states can sharpen the boundary between quantum and classica…
Risk-minimizing states for the quantum-phase-estimation algorithm
Joseph G. Smith, Crispin H. W. Barnes, David R. M. Arvidsson-Shukur
The quantum-phase-estimation algorithm (QPEA) is widely used to find estimates of unknown phases. The original algorithm relied on an input state in a uniform superposition of all…