activity
20242026
collaborators

10 papers

quant-ph2026

Demonstrating an unconditional separation between quantum and classical information resources

William Kretschmer, Sabee Grewal, Matthew DeCross +8

A longstanding goal in quantum information science is to demonstrate quantum computations that cannot be feasibly reproduced on a classical computer. Such demonstrations mark major…

quant-ph2026

Fully optimised variational simulation of a dynamical quantum phase transition on a trapped-ion quantum computer

Lesley Gover, Vinul Wimalaweera, Fariha Azad +3

We time-evolve a translationally invariant quantum state on the Quantinuum H1-1 trapped-ion quantum processor, studying the dynamical quantum phase transition of the transverse fie…

quant-ph2026

Digital quantum magnetism on a trapped-ion quantum computer

Reza Haghshenas, Eli Chertkov, Michael Mills +56

Digital quantum matter -- realized when discrete quantum gates approximate continuous time evolution -- is susceptible to heating into chaotic, structureless states. If digitizatio…

quant-ph2026

Computing with many encoded logical qubits beyond break-even

Shival Dasu, Matthew DeCross, Andrew Y. Guo +42

High-rate quantum error correcting (QEC) codes encode many logical qubits in a given number of physical qubits, making them promising candidates for quantum computation. Implementi…

quant-ph2025

Controlled Gate Networks: Theory and Application to Eigenvalue Estimation

Max Bee-Lindgren, Zhengrong Qian, Matthew DeCross +5

We introduce a new scheme for quantum circuit design called controlled gate networks. Rather than trying to reduce the complexity of individual unitary operations, the new strategy…

quant-ph2025

Helios: A 98-qubit trapped-ion quantum computer

Anthony Ransford, M. S. Allman, Jake Arkinstall +183

We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features Ba hyperfine…