__________
Ph.D. Candidate
University of Chicago
yongshan @ uchicago . edu
______________________________
NEWS: I will join Yale University as an Assistant Professor of Computer Science in Fall 2021.
I am a finalyear PhD candidate at the University of Chicago, advised by Prof. Fred Chong. My research interests are in computer architectures, quantum computing, and error correction. I build systems that enable efficient compilation from highlevel circuits to nearterm quantum devices, and design techniques and algorithms to protect them against noise. I am a recipient of the William Rainey Harper Dissertation Fellowship, one of UChicago's highest honors, and the Siebel Scholarship.
In Spring and Summer 2020, I visited MIT under the IvyPlus Exchange Scholar Program. Before UChicago, I received my BS degrees in Computer Science and Physics from Carnegie Mellon University, where I was advised by Prof. Ryan O'Donnell.
______________________________

TILT: Achieving Higher Fidelity on a TrappedIon LinearTape Quantum Computing Architecture · paper
X.C. Wu, D. Debroy, Y. Ding, J. M. Baker, Y. Alexeev, K. R. Brown, and F. T. Chong.
In proc. of 27th Intl. Symposium on HighPerformance Computer Architecture (HPCA), Feb 2021 
O(N^3) Measurement Cost for Variational Quantum Eigensolver on Molecular Hamiltonians · paper
P. Gokhale, O. Angiuli, Y. Ding, K. Gui, T. Tomesh, M. Suchara, M. Martonosi, and F. T. Chong.
IEEE Transactions on Quantum Engineering (TQE), Nov 2020 
Systematic Crosstalk Mitigation for Superconducting Qubits via FrequencyAware Compilation · paper software
Y. Ding, P. Gokhale, S. F. Lin, R. Rines, T. Propson, and F. T. Chong.
In proc. of 53rd Intl. Symposium on Microarchitecture (MICRO), Oct 2020
IEEE Micro Top Picks, Honorable Mention 
Minimizing State Preparations in Variational Quantum Eigensolver by Partitioning into Commuting Families · paper
P. Gokhale, O. Angiuli, Y. Ding, K. Gui, T. Tomesh, M. Suchara, M. Martonosi, and F. T. Chong.
In IEEE Intl. Conference on Quantum Computing and Engineering (QCE), Oct 2020
IBM Q Best Paper Award, First Prize · link
QCE Best Paper Award · link 
ResourceEfficient Quantum Computing by Breaking Abstractions · paper
Y. Shi, P. Gokhale, P. Murali, J. M. Baker, C. Duckering, Y. Ding, N. C. Brown, C. Chamberland, A. JavadiAbhari, A. Cross, D. I. Schuster, K. R. Brown, M. Martonosi, and F. T. Chong.
In proc. of the IEEE, Jun 2020 (Invited Paper) 
SQUARE: Strategic Quantum Ancilla Reuse for Modular Quantum Programs via CostEffective Uncomputation · paper benchmarks
Y. Ding, X.C. Wu, A. Holmes, A. Wiseth, D. Franklin, M. Martonosi, and F. T. Chong.
In proc. of 47th Intl. Symposium on Computer Architecture (ISCA), May 2020
IEEE Micro Top Picks, Honorable Mention 
NISQ+: Boosting Quantum Computing Power by Approximating Quantum Error Correction · paper
A. Holmes, M. R. Jokar, G. Pasandi, Y. Ding, M. Pedram, and F. T. Chong.
In proc. of 47th Intl. Symposium on Computer Architecture (ISCA), May 2020 
ILPBased Scheduling for LinearTape Model TrappedIon Quantum Computers · poster
X.C. Wu, Y. Ding, Y. Shi, Y. Alexeev, H. Finkel, K. Kim, and F. T. Chong.
In IEEE/ACM 30th Intl. Conference for High Performance Computing, Networking, Storage and Analysis (SC), Nov 2019 
Partial Compilation of Variational Algorithms for Noisy IntermediateScale Quantum Machines · paper software
P. Gokhale, Y. Ding, T. Propson, C. Winkler, N. Leung, Y. Shi, D. I. Schuster, H. Hoffmann, and F. T. Chong.
In proc. of 52nd Intl. Symposium on Microarchitecture (MICRO), Oct 2019 
MagicState Functional Units: Mapping and Scheduling MultiLevel Distillation Circuits for FaultTolerant Quantum Architectures · paper
Y. Ding, A. Holmes, A. JavadiAbhari, D. Franklin, M. Martonosi, and F. T. Chong.
In proc. of 51st Intl. Symposium on Microarchitecture (MICRO), Oct 2018 
Resource Optimized Quantum Architectures for Surface Code Implementations of MagicState Distillation · paper
A. Holmes, Y. Ding, A. JavadiAbhari, D. Franklin, M. Martonosi, and F. T. Chong.
Microprocessors and Microsystems (MICPRO), Feb 2019 
Charm: A Language for Closedform Highlevel Architecture Modeling · paper
W. Cui, Y. Ding, D. Dangwal, A. Holmes, J. McMahan, A. JavadiAbhari, G. Tzimpragos, F. T. Chong, and T. Sherwood.
In proc. of 45th Intl. Symposium on Computer Architecture (ISCA), Jun 2018 
Quantum Algorithms on Boolean Matrix Product Verification · paper
Y. Ding.
CMU Undergraduate Thesis 2016, advised by R. O'Donnell
Mathematics Competition, Runner Up · link 
Analysis of Reconstructed J/ψ Meson Candidates in pp̄ Collisions · paper
Synthesis Lectures on Computer Architecture
Quantum Computer Systems: Research for Noisy IntermediateScale Quantum Computers
Download/Buy
Morgan & Claypool Publishers, June 2020
 UChicagoX: Quantum Computer Systems (coinstructor) · Spring 2021 · youtube (Coming soon on EdX)
 MIT 8.371: Quantum Information Science II (TA/guest lecturer) · Spring 2020
 UChicago 33001: Quantum Computer Systems (coinstructor) · Fall 2018
 UChicago 16200: Honors Intro to Computer Science II (TA) · Winter 2017, Winter 2018, Winter 2019
 CMU 15210: Parallel and Sequential Data Structures and Algorithms (TA) · Spring 2015, Fall 2015, Spring 2016
 Systematic Crosstalk Mitigation · slides
Invited seminar talk at QISES, Chicago Quantum Exchange, 2020  Systematic Crosstalk Mitigation · slides
Invited seminar talk at AQT, Lawrence Berkeley National Lab, 2020  Systematic Crosstalk Mitigation · slides/video
Conference talk at MICRO, 2020  Systematic Crosstalk Mitigation · slides
Invited talk at QIP Club, Chicago Quantum Exchange, 2020  Strategic Quantum Ancilla Reuse · slides/video
Conference talk at ISCA, 2020  Significance and Challenges in Quantum Computing Education
Panelist at WCAE, 2019  Architecting our way up the quantum ladder: from NISQ to FT quantum computers · slides
Invited seminar talk at NC State, 2019  Magicstate functional units · slides/video
Conference talk at MICRO, 2018
 Putting Qubits to Work — Quantum Memory Management · link
with F. T. Chong.
Article appeared on ACM SIGARCH, 2020  The Case for Quantum Computing · link
with F. T. Chong and K. R. Brown.
Article appeared on ACM SIGARCH, 2019
 Top Picks in Computer Architecture Conferences of 2020, Honorable Mention for the paper Systematic Crosstalk Mitigation for Superconducting Qubits via FrequencyAware Compilation with P. Gokhale et al.
IEEE Micro, 2021  Top Picks in Computer Architecture Conferences of 2020, Honorable Mention for the paper SQUARE: Strategic Quantum Ancilla Reuse for Modular Quantum Programs via CostEffective Uncomputation with X.C. Wu et al.
IEEE Micro, 2021  Siebel Scholars Award, 2021
Thomas and Stacey Siebel Foundation, 20202021 · link  William Rainey Harper Dissertation Fellowship
University of Chicago, 20202021 · link  QCE Best Paper Award and IBM Q Best Paper Award, First Prize for the paper Minimizing State Preparations in Variational Quantum Eigensolver by Partitioning into Commuting Families with P. Gokhale et al.
IEEE Quantum Week, 2020 link and IBM Research, 2019 link  University Honors, SCS College Honors, MCS College Honors
Carnegie Mellon University, 2016  Mathematics Competition, Runner Up for my undergrad thesis Quantum Algorithms on Boolean Matrix Product Verification
Carnegie Mellon University, 2016 · link  Sigma Xi Poster Competition, Second Prize for the paper Analysis of Reconstructed J/ψ Meson Candidates in pp̄ Collisions
Carnegie Mellon University, 2015 · link