Research

A list of my research articles. They can also be found on arXiv and Google Scholar.

Research papers

• In-Situ Simultaneous Magic State Injection on Arbitrary CSS qLDPC Codes
  Kun Liu, Shifan Xu, Tomas Jochym-O'Connor, Zhiyang He, Shraddha Singh, Yongshan Ding
  arXiv pre-print (2026) arXiv:2604.05126
• Constant-Time Surgery on 2D Hypergraph Product Codes with Near-Constant Space Overhead
  Kathleen Chang, Zhiyang He, Theodore J. Yoder, Guanyu Zhu, Tomas Jochym-O'Connor
  arXiv pre-print (2026) arXiv:2603.02157
• Universal adapters between quantum LDPC codes
  Esha Swaroop, Tomas Jochym-O'Connor, Theodore J. Yoder
  PRX Quantum 7, 010324 (2026) arXiv:2410.03628
• Adaptive Channel Reshaping for Improved Entanglement Distillation
  Dina Abdelhadi, Tomas Jochym-O'Connor, Vikesh Siddhu, John Smolin
  Phys. Rev. Res. 8, 013018 (2026) arXiv:2410.22295
• Phase diagram of the three-dimensional subsystem toric code
  Yaodong Li, C. W. von Keyserlingk, Guanyu Zhu, Tomas Jochym-O'Connor
  Phys. Rev. Res. 6, 043007 (2024) arXiv:2305.06389
• Entanglement sharing across a damping-dephasing channel
  Vikesh Siddhu, Dina Abdelhadi, Tomas Jochym-O'Connor, John Smolin
  IEEE International Symposium on Information Theory (ISIT) , 1432 (2024) arXiv:2405.06231
• Encoding a magic state with beyond break-even fidelity
  Riddhi S. Gupta, Neereja Sundaresan, Thomas Alexander, Christopher J. Wood, Seth T. Merkel, Michael B. Healy, Marius Hillenbrand, Tomas Jochym-O'Connor, James R. Wootton, Theodore J. Yoder, Andrew W. Cross, Maika Takita, Benjamin J. Brown
  Nature 625, 259 (2024) arXiv:2305.13581
• Quantum error correction with fractal topological codes
  Arpit Dua, Tomas Jochym-O'Connor, Guanyu Zhu
  Quantum 7, 1122 (2023) arXiv:2201.03568
• Homomorphic logical measurements
  Shilin Huang, Tomas Jochym-O'Connor, Theodore J. Yoder
  PRX Quantum 4, 030301 (2023) arXiv:2211.03625
• Topological Order, Quantum Codes, and Quantum Computation on Fractal Geometries
  Guanyu Zhu, Tomas Jochym-O'Connor, Arpit Dua
  PRX Quantum 3, 030338 (2022) arXiv:2108.00018
• Four-dimensional toric code with non-Clifford transversal gates
  Tomas Jochym-O'Connor, Theodore J. Yoder
  Phys. Rev. Research 3, 013118 (2021) arXiv:2010.02238
• Advantages of versatile neural-network decoding for topological codes
  Nishad Maskara, Aleksander Kubica, Tomas Jochym-O'Connor
  Phys. Rev. A 99, 052351 (2019) arXiv:1802.08680
• Fault-tolerant gates via homological product codes
  Tomas Jochym-O'Connor
  Quantum 3, 120 (2019) arXiv:1807.09783
• Disjointness of Stabilizer Codes and Limitations on Fault-Tolerant Logical Gates
  Tomas Jochym-O'Connor, Aleksander Kubica, Theodore J. Yoder
  Phys. Rev. X 8, 021047 (2018) arXiv:1710.07256
• Comparison of memory thresholds for planar qudit geometries
  Jacob Marks, Tomas Jochym-O'Connor, Vlad Gheorghiu
  New J. Phys. 19, 113022 (2017) arXiv:1701.02335
• Error suppression via complementary gauge choices in Reed-Muller codes
  Christopher Chamberland, Tomas Jochym-O'Connor
  Quantum Sci. Technol. 2, 035008 (2017) arXiv:1705.00010
• Overhead analysis of universal concatenated quantum codes
  Christopher Chamberland, Tomas Jochym-O'Connor, Raymond Laflamme
  Phys. Rev. A 95, 022313 (2017) arXiv:1609.07497
• Classification of transversal gates in qubit stabilizer codes
  Jonas T. Anderson, Tomas Jochym-O'Connor
  Quant. Inf. Comput. 16, 0771 (2016) arXiv:1409.8320
• Thresholds for universal concatenated quantum codes
  Christopher Chamberland, Tomas Jochym-O'Connor, Raymond Laflamme
  Phys. Rev. Lett. 117, 010501 (2016) arXiv:1603.02704
• Stacked codes: Universal fault-tolerant quantum computation in a two-dimensional layout
  Tomas Jochym-O'Connor, Stephen D. Bartlett
  Phys. Rev. A 93, 022323 (2016) arXiv:1509.04255
• Private Quantum Subsystems and Quasiorthogonal Operator Algebras
  Jeremy Levick, Tomas Jochym-O'Connor, David Kribs, Raymond Laflamme, Rajesh Pereira
  J. Phys. A: Math. Theor. 49, 125302 (2016) arXiv:1510.00939
• On the robustness of bucket brigade quantum RAM
  Srinivasan Arunachalam, Vlad Gheorghiu, Tomas Jochym-O'Connor, Michele Mosca, Priyaa Varshinee Srinivasan
  New J. Phys. 17, 123010 (2015) arXiv:1502.03450
• Quantum Subsystems: Exploring the Complementarity of Quantum Privacy and Error Correction
  Tomas Jochym-O'Connor, David W Kribs, Raymond Laflamme, Sarah Plosker
  Phys. Rev. A 90, 032305 (2014) arXiv:1405.1798
• Using concatenated quantum codes for universal fault-tolerant quantum gates
  Tomas Jochym-O'Connor, Raymond Laflamme
  Phys. Rev. Lett. 112, 010505 (2014) arXiv:1309.3310
• Private Quantum Subsystems
  Tomas Jochym-O'Connor, David W Kribs, Raymond Laflamme, Sarah Plosker
  Phys. Rev. Lett. 111, 030502 (2013) arXiv:1208.2246
• The robustness of magic state distillation against errors in Clifford gates
  Tomas Jochym-O'Connor, Yafei Yu, Bassam Helou, Raymond Laflamme
  Quant. Inf. Comput. 13, 0361 (2013) arXiv:1205.6715
• Trade-off coding for universal qudit cloners motivated by the Unruh effect
  Tomas Jochym-O’Connor, Kamil Bradler, Mark M Wilde
  J. Phys. A: Math. Theor. 44, 415306 (2011) arXiv:1103.0286
• Capacities of Grassmann channels
  Kamil Bradler, Tomas Jochym-O’Connor, Rocio Jauregui
  J. Math. Phys. 52, 062202 (2011) arXiv:1011.2215

Review articles

• NMR Quantum Information Processing
  Dawei Lu, Aharon Brodutch, Jihyun Park, Hemant Katiyar, Tomas Jochym-O’Connor, Raymond Laflamme
  Electron Spin Resonance (ESR) Based Quantum Computing , 193 (2016) arXiv:1501.01353

Theses

• Novel Methods in Quantum Error Correction
  Tomas Jochym-O’Connor
  University of Waterloo, PhD thesis (2016)
  Supervisor: Raymond Laflamme
• A study of the robustness of magic state distillation against Clifford gate faults
  Tomas Jochym-O’Connor
  University of Waterloo, MSc thesis (2012)
  Supervisor: Raymond Laflamme