1. Designer atomic qubits

Individually addressable, long-lived qubits with tailorable spin, optical and electrical properties are fundamental to building future quantum machines. We use an atom-up approach for atomic precision control of the creation, design, and manipulation of individual qubit in solids. We are particularly interested in wafer-scale manufacturing of atomic qubits that will enable next generation quantum systems.

  • T. Zhong and Ph. Goldner, "Emerging rare-earth doped material platforms for quantum nanophotonics," Nanophotonics 8, 2003-2015, (2019).

2. Quantum network and interconnect

Quantum Internet is made of nodes where entanglement is generated, stored and processed, and quantum links for transferring entanglement between those nodes. We focuses on developing enabling technologies for efficient light-matter interface at individual quantum nodes and high-throughput quantum communication links. We collaborate with Argonne-Fermilab National Lab quantum testbed to develop telecom quantum nodes and photonic teleportation links. See the news here.

  • T. Zhong, et al. "Nanophotonic quantum memory with optically controlled retrieval" Science 357 1392-1395 (2017).

  • T. Zhong, J. Kindem, E. Miyazono, and A. Faraon, “Nanophotonic coherent light-matter interface based on Rare-Earth doped crystals,” Nature Communications 6, 8206 (2015).

  • T. Zhong, J. M. Kindem, J. Rochman, and A. Faraon,"On-chip storage of broadband photonic qubits in a cavity-protected rare-earth ensemble," Nature Communications 8, 14107 (2017).

3. Hybrid quantum systems for transduction

We are exploring new material and device platforms in which spin qubits interact with variety of other quantum degrees of freedoms including superconducting circuits, optical photons, phonons and magnons. Such hybrid quantum systems could find key applications in quantum computing, quantum simulations and quantum sensing. The transduction modalities we study include:

  • Magneto-optic transduction

  • Acoustic-optic transduction

  • Electro-optic transduction

4. Quantum information and quantum optics

We theoretically and experimentally investigate new paradigms of quantum entanglement generation and quantum information transfer in optical, microwave or hybrid systems. Current projects include quantum network simulator (collaboration with Dr. Martin Suchara, Dr. Raj Kettimuthu at Argonne), in-situ spin-photon entanglement generation (collaboration with Prof. Kero Lau, Prof. Aash Clerk), microwave quantum state transfer and multi-node routing network. Recent works include:

  • X. Wu, A. Kolar, J. Chung, D. Jin, T. Zhong, R. Kettimuthu, M. Suchara, "SeQUeNCe: a customizable discrete-event simulator of quantum networks" Quantum Science and Technology 6, 045027 (2021).

  • Z. Xie, T. Zhong, X. Xu, J. Liang, Y. Gong, J. Shapiro, F. Wong, and C. W. Wong, “Harnessing high-dimensional hyperentanglement through a biphoton frequency comb,” Nature Photonics 9, 536-542 (2015). News and media: Nature photonics; Phys.org; EurekAlert; ScienceDaily

  • T. Zhong, H. Zhou, R. D. Horansky, C. Lee, V. B. Verma, A. E. Lita, A. Restelli, J. C. Bienfang, R. P. Mirin, T. Gerrits, S. W. Nam, F. Marsili, M. D. Shaw, Z. Zhang, L. Wang, D. Englund, G. W. Wornell, J. H. Shapiro, and F. N. C. Wong, “Photon efficient high-dimensional quantum key distribution,” New J. Phys. 17, 022002 Fast Track Communications (2015). Video abstract