Hartree Postdoctoral Fellow (2014-2017)

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Jianxin Chen was a QuICS Hartree Postdoctoral Fellow in quantum information and computer science. His research focused on the theory of quantum information and its applications to algorithms, complexity theory and cryptography. Chen has co-authored several academic articles, including “Unextendible Product Basis for Fermionic Systems,” “Symmetric Extension of Two-Qubit States,” and “Universal Entanglers for Bosonic and Fermionic Systems.” He has held postdoctoral fellow positions in the Department of Mathematics and Statistics at the University of Guelph and in the Institute for Quantum Computing at the University of Waterloo. Chen received his doctorate in computer science from Tsinghua University in 2010. After QuICS, he continued on to join the new Alibaba quantum group in Seattle.

“Quantum algorithm for multivariate polynomial interpolation”, Proceedings of The Royal Society A, vol. 474, no. 2209, 2018. ,

“Quantum state tomography via reduced density matrices”, Physical Review Letters, vol. 118, p. 020401, 2017. ,

“Quantifying the coherence of pure quantum states”, Physical Review A, vol. 94, no. 4, p. 042313, 2016. ,

“Tomography is necessary for universal entanglement detection with single-copy observables”, Physical Review Letters, vol. 116, no. 23, p. 230501, 2016. ,

“Pure-state tomography with the expectation value of Pauli operators”, Physical Review A, vol. 93, no. 3, p. 032140, 2016. ,

“Detecting Consistency of Overlapping Quantum Marginals by Separability”, Physical Review A, vol. 93, no. 3, p. 032105, 2016. ,

“Discontinuity of Maximum Entropy Inference and Quantum Phase Transitions”, New Journal of Physics, vol. 17, no. 8, p. 083019, 2015. ,

“The Minimum Size of Unextendible Product Bases in the Bipartite Case (and Some Multipartite Cases)
”, Communications in Mathematical Physics, vol. 333, no. 1, pp. 351 - 365, 2015. ,

“Universal Subspaces for Local Unitary Groups of Fermionic Systems”, Communications in Mathematical Physics, vol. 333, no. 2, pp. 541 - 563, 2015. ,

“Symmetric Extension of Two-Qubit States”, Physical Review A, vol. 90, no. 3, 2014. ,

“Unextendible Product Basis for Fermionic Systems”, Journal of Mathematical Physics, vol. 55, no. 8, p. 082207, 2014. ,

“Uniqueness of Quantum States Compatible with Given Measurement Results”, Physical Review A, vol. 88, no. 1, 2013. ,

“Symmetries of Codeword Stabilized Quantum Codes”, 8th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2013), vol. 22, pp. 192-206, 2013. ,

“From Ground States to Local Hamiltonians”, Physical Review A, vol. 86, no. 2, 2012. ,

“Correlations in excited states of local Hamiltonians”, Physical Review A, vol. 85, no. 4, 2012. ,