About me
Xiaodi Wu ( in simplified Chinese )
I am an Associate Professor in the Department of Computer Science and Institute for Advanced Computer Studies at the University of Maryland, College Park, and a Fellow at the Joint Center for Quantum Information and Computer Science (QuICS). I am also an Amazon Visiting Academic working for AWS Braket. I am a recipient of the Sloan Research Fellowship, NSF CAREER, and AFOSR YIP awards.
Before coming to Maryland, I was an Assistant Professor in the Computer and Information Science Department at the University of Oregon from 2015 to 2017. Before that, I was a Postdoctoral Associate at Massachusetts Institute of Technology from 2013 to 2015 (advisor: Aram Harrow, Scott Aaronson). I was also a Simons Research Fellow at the Simons Institute for the Theory of Computing at Berkeley, for the program of Quantum Hamiltonian Complexity in Spring 2014 (advisor: Umesh Vazirani). I also spent two summers at the Institute for Quantum Computing, University of Waterloo as a student intern (advisor: John Watrous).
I received my Ph.D. in theoretical computer science in 2013 (advisor: Yaoyun Shi) from the University of Michigan, Ann Arbor. I received my B.S. degree in mathematics and physics in 2008 from the Academic Talent Program, Tsinghua University.
Research Interests
My research aims to bridge the gap between the theoretical foundation of quantum computing and the limitation of realistic quantum machines. More specifically, I am working on the foundations of practical quantum applications on realistic quantum machines by investigating computational models that capture the native programmability of quantum devices. I am also building efficient and reliable systems to operate both nearterm and longterm quantum devices.
My group recently focuses on the investigation of Hamiltonianoriented Quantum Algorithm Design and Programming, which treats quantum Hamiltonian evolution as the central object in endtoend quantum application design.
We illustrate that the Hamiltonianoriented design not only allows more efficient implementation of known quantum algorithms but also inspires novel quantum algorithms, especially in optimization and scientific computing (e.g., Quantum Hamiltonian Descent), which are hard to perceive in the circuit model. We also develop a programming infrastructure (i.e., SimuQ) for easy implementation of Hamiltonianbased quantum applications for domain experts on heterogeneous quantum devices. Please check my Research Overview for details of my existing and ongoing projects.
Shortcuts to GitHub Projects from my group.
Hamiltonianoriented Algorithm Design and Programming
A Certified Quantum Software ToolChain
PostQuantum Cryptography: Certification of Security and Implementation
Differentiable Quantum Programming
Practical Verification of Specific Quantum Computing Tasks
Meta Programming for Quantum Computing
Quantum Program Synthesis
Quantum Machine Learning
Shortcuts to Expository Materials
Group Information
I am actively looking for students and postdocs who are interested in quantum computing.
If you are interested in working with me, please send me an email to let me know your interest.
Postdocs:
Junyi Liu (2023)
Liyi Li (coadvised with Mike Hicks, 2020  2023. Assistant professor at Iowa State University.)
Xiong Fan (coadvised with Jonathan Katz, 2020  2021. Assistant professor at Rutgers University. )
Robert Rand (coadvised with Mike Hicks, 20182020. Assistant professor at University of Chicago.)
QuICS Hartree Postdoctoral Fellows (who I have closely worked with): Penghui Yao (now Associate Professor at Nanjing University), Xin Wang (now Associate Professor at HKUST(Guangzhou)), Cedric Lin (now at AWS Braket).
Current Students:
(Ph.D.) Yuxiang Peng, Jiaqi Leng, Jacob Young, Ethan Hickman, Haowei Deng, Yufan Zheng, Yingkang Cao, Yi Lee, Connor Clayton, Joseph Li, Suying Liu, Haohai Shi
News
09/2023, two of our research papers SimuQ: A DomainSpecific Language For Quantum Simulation With Analog Compilation and A Case for Synthesis of Recursive Quantum Unitary Programs will appear in the 51st ACM SIGPLAN Symposium on Principles of Programming Languages (POPL 2024).
05/2023, our research paper A Formally Certified EndtoEnd Implementation of Shor's Factorization Algorithm appears in the Proceedings of the National Academy of Sciences (PNAS).
05/2023, please check our research paper Fixing and Mechanizing the Security Proof of FiatShamir with Aborts and Dilithium (to appear in CRYPTO 2023) on how a serious securityproof bug is discovered by formal verification and is later fixed for Dilithium (NIST's choice of the postquantum digital signature scheme).
04/2023, our research paper Analyzing Convergence in Quantum Neural Networks: Deviations from Neural Tangent Kernels will appear in ICML 2023.
02/2023, I am honored to receive the Sloan Research Fellowship.
02/2023, please check our new domainspecific programming language for quantum simulation (SIMUQ) which supports analog compilation through a newly developed abstraction called the abstract analog instruction set (AAIS) that models the programmability of heterogeneous analog quantum devices.
02/2023, our research paper Distributed Quantum Sensing Network with Geographically Constrained Measurement Strategies will appear at the 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2023).
01/2023, my group will give four talks in APS March Meeting 2023 at session A64, A72, G70, and Y70.
12/2022, check our website for Quantum Hamiltonian Descent, and my talk at the Fields institute.
11/2022, our research paper A Convergence Theory for Overparameterized Variational Quantum Eigensolvers will appear at QIP 2023.
09/2022, our research paper Differentiable Analog Quantum Computing for Optimization and Control will appear at NeurIPS 2022 as a featured paper.
06/2022, our research paper Verified Compilation of Quantum Oracles will appear at the OOPSLA 2022.
02/2022, our research paper Algebraic Reasoning of Quantum Programs via NonIdempotent Kleene Algebra will appear at the 43rd ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI 2022).
02/2022, our research paper Constantround Blind Classical Verification of Quantum Sampling will appear at Eurocrypt 2022.
10/2021, I gave an invited talk in a special session on quantum machine learning at the 40th International Conference on ComputerAided Design (ICCAD 2021). slides video
07/2021, our research paper EasyPQC: Verifying PostQuantum Cryptography will appear at the ACM Conference on Computer and Communication Security (CCS 2021).
05/2021, Congratulations to Shouvanik Chakrabarti on the J.P. Morgan Chase FLARE Fellowship.
05/2021, our research paper Exponentially Many Local Minima in Quantum Neural Networks will appear at the 38th International Conference on Machine Learning (ICML 2021).
02/2021, Congratulations to Jiaqi Leng for presenting his first QIP talk Quantum Algorithms for Escaping from Saddle Points.
01/2021, Congratulations to Yuxiang Peng for winning the 2nd place in Student Research Competition (SRC) at POPL 2021.
01/2021, our research paper A Verified Optimizer for Quantum Circuits received a distinguished paper award at POPL 2021.
01/2021, I delivered a tutorial on the intersection of quantum computing and programming languages at POPL 2021. My slides are available here video.
12/2020, our research paper Sublinear Classical and Quantum Algorithms for General Matrix Games will appear at the 35th AAAI Conference on Artificial Intelligence (AAAI 2021).
11/2020, I am honored to be supported by the AFOSR Young Investigator Research Program (YIP) for developing Automated Security Analysis of Cryptographic Systems Under Quantum Attacks with formal methods.
10/2020, our research paper A Verified Optimizer for Quantum Circuits will appear at the 48th ACM SIGPLAN Symposium on Principles of Programming Languages (POPL 2021).
10/2020, our research paper Simulating Large Quantum Circuits on A Small Quantum Computer appears at Physical Review Letters.
06/2020, I am guest editing a special issue on the Techniques of Programming Languages, Logic, and Formal Methods in Quantum Computing (callforpapers) for ACM Transactions on Quantum Computing. Please contribute!! The deadline is August 15th, 2020.
02/2020, our research paper On the Principles of Differentiable Quantum Programming Languages will appear at the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI 2020).
02/2020, I am honored to be supported by the NSF CAREER award (CCF1942837) for investigation on the foundation of endtoend quantum applications.
11/2019, our research paper Quantum algorithm for estimating volumes of convex bodies will appear at QIP 2020 as a singletrack talk.
09/2019, our research paper Quantum Wasserstein Generative Adversarial Networks will appear at the 33rd Annual Conference on Neural Information Processing Systems (NeurIPS 2019).
07/2019, I am coorganizing the First International Workshop on Programming Languages and Quantum Computing (PLanQC 2020) at POPL 2020 with Michael Hicks and Robert Rand. The deadline for submission is AOE October 28, 2019.
06/2019, our research paper Verified Optimization in a Quantum Intermediate Representation (extended abstract) will appear at Quantum Physics and Logic (QPL 2019).
04/2019, our research paper Sublinear quantum algorithms for training linear and kernelbased classifiers will appear at the 36th International Conference on Machine Learning (ICML 2019).
04/2019, our research paper Quantum SDP Solvers: Large Speedups, Optimality, and Applications to Quantum Learning will appear at ICALP 2019.
11/2018, our research papers Quantum SDP Solvers: Large Speedups, Optimality, and Applications to Quantum Learning and Quantum algorithms and lower bounds for convex optimization will appear at QIP 2019.
10/2018, our research paper Quantitative Robustness Analysis of Quantum Programs will appear at the 46th ACM SIGPLAN Symposium on Principles of Programming Languages (POPL 2019).
09/2018, I am organizing a workshop on the intersection of machine learning and quantum information (Videos and Slides NOW AVAILABLE) at QuICS on September 24  28, 2018.
01/2017, our research papers General randomness amplification with nonsignaling security and Limitations of semidefinite programs for separable states and entangled games appeared at QIP 2017.
01/2017, our research paper Invariants of Quantum Programs: Characterizations and Generation appeared at the 44th ACM SIGPLAN Symposium on Principles of Programming Languages (POPL 2017).
Research supported by

National Science Foundation (NSF)


Department of Energy (DOE)


Air Force Office of Scientific Research (AFOSR)


Army Research Office (ARO)


Amazon Web Services (AWS)


Alfred P. Sloan Foundation

I am part of the following collaborations:
Contact
Office: IRB 5210
Address:
Computer Science
5109 Brendan Iribe Center for Computer Science and Engineering
8125 Paint Branch Drive
University of Maryland
College Park, MD 20742
Email: xwu (at) cs.umd.edu
