352 citations · 786 across the 21 of their papers we have counts for
23 papers
Graph Neural Post-selection for Quantum Error Correction
Conor Carty, Tamas Noszko, Joschka Roffe +1
Post-selection improves the logical reliability of quantum computation by rejecting shots which are likely to result in logical failure. We introduce graph neural networks that pre…
Efficiently simulable quantum circuits with large entanglement, magic, and non-Gaussianity via code-compiled tensor networks
Aydin Deger, Stergios Koutsioumpas, Mark Webster +3
We introduce a family of quantum circuits that possess standard indicators of classical simulation hardness including high entanglement entropy, magic, and non-Gaussianity, yet adm…
Nearest-neighbour gates are all you need: High-rate quantum low-density parity-check codes on a planar grid
Boren Gu, Tamas Noszko, Vincent Steffan +4
High-performance quantum low-density parity-check codes promise substantial reductions in the overhead of fault-tolerant quantum computation, but most constructions require long-ra…
QGPU: Parallel logic in quantum LDPC codes
Boren Gu, Andy Zeyi Liu, Armanda O. Quintavalle +3
Quantum error correction is critical to the design and manufacture of scalable quantum computing systems. Recently, there has been growing interest in quantum low-density parity-ch…
Colour Codes Reach Surface Code Performance using Vibe Decoding
Stergios Koutsioumpas, Tamas Noszko, Hasan Sayginel +2
Two-dimensional quantum colour codes hold significant promise for quantum error correction, offering advantages such as planar connectivity and low overhead logical gates. Despite…
Logical accreditation: a framework for efficient certification of fault-tolerant computations
James Mills, Adithya Sireesh, Dominik Leichtle +2
As fault-tolerant quantum computers scale, certifying the accuracy of computations performed with encoded logical qubits will soon become classically intractable. This creates a cr…
Engineering CSS surgery: compiling any CNOT in any code
Clément Poirson, Joschka Roffe, Robert I. Booth
We introduce a framework for implementing logic in CSS quantum error correction codes, building on the surgery methods of Cowtan and Burton [CB24]. Our approach offers a systematic…
Hardware-tailored logical Clifford circuits for stabilizer codes
Eric J. Kuehnke, Kyano Levi, Joschka Roffe +2
Quantum error correction is the art of protecting fragile quantum information through suitable encoding and active interventions. After encoding logical qubits into physi…
Computing Efficiently in QLDPC Codes
Alexander J. Malcolm, Andrew N. Glaudell, Patricio Fuentes +10
It is the prevailing belief that quantum error correcting techniques will be required to build a utility-scale quantum computer able to perform computations that are out of reach o…
An almost-linear time decoding algorithm for quantum LDPC codes under circuit-level noise
Antonio deMarti iOlius, Imanol Etxezarreta Martinez, Joschka Roffe +1
Fault-tolerant quantum computers must be designed in conjunction with classical co-processors that decode quantum error correction measurement information in real-time. In this wor…
Localized statistics decoding for quantum low-density parity-check codes
Timo Hillmann, Lucas Berent, Armanda O. Quintavalle +3
Quantum low-density parity-check codes are a promising candidate for fault-tolerant quantum computing with considerably reduced overhead compared to the surface code. However, the…
High-threshold, low-overhead and single-shot decodable fault-tolerant quantum memory
Thomas R. Scruby, Timo Hillmann, Joschka Roffe
We present a new family of quantum low-density parity-check codes, which we call radial codes, obtained from the lifted product of a specific subset of classical quasi-cyclic codes…
Analog information decoding of bosonic quantum LDPC codes
Lucas Berent, Timo Hillmann, Jens Eisert +2
Quantum error correction is crucial for scalable quantum information processing applications. Traditional discrete-variable quantum codes that use multiple two-level systems to enc…
The domain wall color code
Konstantin Tiurev, Arthur Pesah, Peter-Jan H. S. Derks +4
We introduce the domain wall color code, a new variant of the quantum error-correcting color code that exhibits exceptionally high code-capacity error thresholds for qubits subject…
Correcting non-independent and non-identically distributed errors with surface codes
Konstantin Tiurev, Peter-Jan H. S. Derks, Joschka Roffe +2
A common approach to studying the performance of quantum error correcting codes is to assume independent and identically distributed single-qubit errors. However, the available exp…
Bias-tailored quantum LDPC codes
Joschka Roffe, Lawrence Z. Cohen, Armanda O. Quintavalle +2
Bias-tailoring allows quantum error correction codes to exploit qubit noise asymmetry. Recently, it was shown that a modified form of the surface code, the XZZX code, exhibits cons…
Single-shot error correction of three-dimensional homological product codes
Armanda O. Quintavalle, Michael Vasmer, Joschka Roffe +1
Single-shot error correction corrects data noise using only a single round of noisy measurements on the data qubits, removing the need for intensive measurement repetition. We intr…
Decoding Across the Quantum LDPC Code Landscape
Joschka Roffe, David R. White, Simon Burton +1
We show that belief propagation combined with ordered statistics post-processing is a general decoder for quantum low density parity check codes constructed from the hypergraph pro…
Quantum Error Correction: An Introductory Guide
Joschka Roffe
Quantum error correction protocols will play a central role in the realisation of quantum computing; the choice of error correction code will influence the full quantum computing s…
Decoding quantum error correction with Ising model hardware
Joschka Roffe, Stefan Zohren, Dominic Horsman +1
Fault tolerant quantum computers will require efficient co-processors for real-time decoding of their adopted quantum error correction protocols. In this work we examine the possib…
Quantum codes from classical graphical models
Joschka Roffe, Stefan Zohren, Dominic Horsman +1
We introduce a new graphical framework for designing quantum error correction codes based on classical principles. A key feature of this graphical language, over previous approache…
Protecting quantum memories using coherent parity check codes
Joschka Roffe, David Headley, Nicholas Chancellor +2
Coherent parity check (CPC) codes are a new framework for the construction of quantum error correction codes that encode multiple qubits per logical block. CPC codes have a canonic…
Graphical Structures for Design and Verification of Quantum Error Correction
Nicholas Chancellor, Aleks Kissinger, Joschka Roffe +2
We introduce a high-level graphical framework for designing and analysing quantum error correcting codes, centred on what we term the coherent parity check (CPC). The graphical for…