Adjunct Associate Professor and Co-Director

3100J Atlantic Building

(301) 314-1850

Yi-Kai Liu is Co-Director of QuICS, an Adjunct Associate Professor in the University of Maryland Institute for Advanced Computer Studies (UMIACS) and a staff scientist in the Applied and Computational Mathematics Division at the National Institutes of Standards and Technology (NIST). Liu's research centers on quantum computation, in particular, quantum algorithms and complexity, quantum state tomography and cryptography. He also works on related topics in compressed sensing and machine learning. He received his doctorate in computer science from the University of California, San Diego in 2007.

“Testing quantum expanders is co-QMA-complete”, Physical Review A, vol. 87, no. 4, 2013. ,

“Multilingual Summarization: Dimensionality Reduction and a Step Towards Optimal Term Coverage”, MultiLing (Workshop on Multilingual Multi-document Summarization), pp. 55-63, 2013. ,

“Building one-time memories from isolated qubits”, Innovations in Theoretical Computer Science (ITCS), pp. 269-286, 2013. ,

“Quantum Tomography via Compressed Sensing: Error Bounds, Sample Complexity, and Efficient Estimators
”, New Journal of Physics, vol. 14, no. 9, p. 095022, 2012. ,

“A Spectral Algorithm for Latent Dirichlet Allocation”, Algorithmica, pp. 193-214, 2012. ,

“Direct Fidelity Estimation from Few Pauli Measurements”, Physical Review Letters, vol. 106, no. 23, 2011. ,

“Universal low-rank matrix recovery from Pauli measurements”, Advances in Neural Information Processing Systems (NIPS), pp. 1638-1646, 2011. ,

“Efficient quantum state tomography”, Nature Communications, vol. 1, no. 9, p. 149, 2010. ,

“Quantum property testing for bounded-degree graphs”, Proc. RANDOM, pp. 365-376, 2010. ,

“Quantum state tomography via compressed sensing”, Physical Review Letters, vol. 105, no. 15, 2010. ,

“Quantum Algorithms Using the Curvelet Transform”, Proc. ACM Symposium on Theory of Computing (STOC), pp. 391-400, 2009. ,

“N-representability is QMA-complete”, Phys. Rev. Lett., vol. 98, no. 11, 2007. ,

“Consistency of Local Density Matrices is QMA-complete”, Proc. RANDOM , pp. 438-449, 2006. ,

“On Bounded Distance Decoding for General Lattices”, Proc. RANDOM, pp. 450-461, 2006. ,

“Designing Incentives for Peer-to-Peer Routing”, Proc. INFOCOM, pp. 374-385, 2005. ,