539 citations · 2.3k across the 63 of their papers we have counts for
64 papers
The Smallest Code with Transversal T
Stergios Koutsioumpas, Darren Banfield, Alastair Kay
We prove that the smallest distance 3 Quantum Error Correcting Code with a transversal gate outside the Clifford group is the well-known 15-qubit Reed-Muller code, also known as a…
Implementing Clifford Gates on Stabilizer Codes via Measurement
Darren Banfield, Heather Leitch, Alastair Kay
We describe a method to use measurements and correction operations in order to implement the Clifford group in a stabilizer code, generalising a result from [Bombin,2011] for topol…
Breaking the Speed Limit for Perfect Quantum State Transfer
Weichen Xie, Alastair Kay, Christino Tamon
We describe a protocol for perfectly transferring a quantum state from one party to another under the dynamics of a fixed, engineered Hamiltonian. Our protocol combines the concept…
Encoded State Transfer: Beyond the Uniform Chain
Alastair Kay
In a recent work (arXiv:2207.01954), we showed that a uniformly coupled chain could be symmetrically extended by engineered spin chains in such a way that we could choose part of t…
Incorporating Encoding into Quantum System Design
Alastair Kay
When creating a quantum system whose natural dynamics provide useful computational operations, designers have two key tools at their disposal: the (constrained) choice of both the…
Noise reducing encoding strategies for spin chains
Catherine Keele, Alastair Kay
We present an encoding technique that reduces the effects of noise on quantum spin systems whose operation is driven by Hamiltonian evolution. This technique is widely applicable,…