I am excited to announce that I have just started a new position at the Department of Computing, Imperial College. As part of my move, I am looking for a PhD student (fully funded, home & overseas) to work on "Controlling Errors in Quantum Computers”. Details can be found in the link below.
Scholarships | Faculty of Engineering | Imperial College London
imperial.ac.uk
Excited to share our new framework on combining QEM and QEC with 1. QEM applied directly to physical qubits 2. NO changes needed to the QEC layer 3. Applicable to most QEM methods & any QEC code Check out how this simple strategy leads to substantial improvement for small codes: shorturl.at/dJbgE
Quantum Error Correction on Error-mitigated Physical Qubits
We present a general framework for applying linear quantum error mitigation (QEM) techniques directly to physical qubits within a logical qubit to suppress logical errors. By exploiting the linearity ...
shorturl.at
Can you correct both X and Z quantum noise using only a bit-flip classical codes? The answer is a surprising YES, using only ONE additional qubit and some post-processing! Check out our new work to see how: scirate.com/arxiv/2510.0...
The deadline is less than 10 days, please share with anyone that you think might be interested.
Zhenyu Cai@zhenyucai.bsky.social · last yr.Our research group is seeking a talented and motivated Postdoctoral Researcher to join us in advancing the practical realisation of quantum technologies (including quantum error correction and mitigation). The deadline is 06 October 2025: tinyurl.com/bdhf3hzt
Our research group is seeking a talented and motivated Postdoctoral Researcher to join us in advancing the practical realisation of quantum technologies (including quantum error correction and mitigation). The deadline is 06 October 2025: tinyurl.com/bdhf3hzt
I am excited to receive the EPSRC Quantum Technology Fellowship hosted in Oxford. I will start a new research group focusing on a full-stack approach to quantum error suppression, including combining error mitigation and correction. More updates soon. tinyurl.com/ywp5zpun
Two Oxford researchers awarded Quantum Technology Fellowships |
Today, the Engineering and Physical Sciences Research Council, EPSRC (part of UK Research and Innovation, UKRI), has awarded eleven Quantum Technology Career Acceleration Fellowships to emerging UK
tinyurl.com
The shortest theoretical possible pulse time in quantum optimal control is usually not the optimal pulse time in practice due to drift fields, limitations in optimisation and noise. In this paper, we show a way to construct pulses with optimal time in practical settings. scirate.com/arxiv/2504.0...
Noise-aware Time-optimal Quantum Control
Quantum optimal control plays a vital role in many quantum technologies, including quantum computation. One of the most important control parameters to optimise for is the evolution time (pulse durati...
scirate.com
Ever thought QEM is only good for expectation value estimation & irrelevant for things like phase estimation? We prove otherwise by constructing an efficient way to apply QEM to any sampling algorithms, turning QEM into an indispensable tool for the early fault-tolerant era. tinyurl.com/4u9vv4hc
Quantum Error Mitigation for Sampling Algorithms
Recent experimental breakthroughs have signalled the imminent arrival of the early fault-tolerant era. However, for a considerable period in the foreseeable future, relying solely on quantum error cor...
scirate.com
New paper out: scirate.com/arxiv/2501.1... By leveraging transversal CNOTs, we have constructed new fault-tolerant circuits for CCZ, CS, and T-state preparation, achieving minimal T depth alongside significantly reduced CNOT depth and qubit counts compared to before.
Low-overhead Magic State Circuits with Transversal CNOTs
With the successful demonstration of transversal CNOTs in many recent experiments, it is the right moment to examine its implications on one of the most critical parts of fault-tolerant computation --...
scirate.com
In scirate.com/arxiv/2412.1..., we look into the practical implementation of surface code without distillation using the sliding surface code scheme (Sci. Adv. 6, eaay4929). We realise that connectivity is not an issue in a 2D device if equipped with local short-range shuttling.
Fault-tolerant Quantum Computation without Distillation on a 2D Device
We show how looped pipeline architectures - which use short-range shuttling of physical qubits to achieve a finite amount of non-local connectivity - can be used to efficiently implement the fault-tol...
scirate.com
New paper: Presents a simple mapping from non-Markovian noise to quantum channels, enabling one to directly import conventional noise suppression techniques. Hopefully, this can be a bridge connecting between non-Markovian and Markovian noise suppression. scirate.com/arxiv/2412.1...
