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The field of quantum information science and technology (QIST) essentially combines aspects of physics, mathematics, and classical computing to use quantum mechanics to solve complex problems much faster than classical computing and to transmit information in an unhackable manner.
Research with quantum computing and quantum networks is taking place around the world in the hopes of developing a Quantum Internet in the future. A Quantum Internet would be a network of quantum computers, sensors, and communication devices that will create, process, and transmit quantum states and entanglement and is anticipated to enhance society’s internet system and provide certain services and securities that the current internet does not have.
While the vision of a quantum internet system is growing and the field has seen a surge in interest from researchers and the public at large, accompanied by a steep increase in the capital invested, an actual quantum internet prototype has not been built. The key hurdle to achieve the potential of making communication networks more secure, measurement systems more precise, and algorithms for certain scientific analyses more powerful relies on developing systems capable of bringing quantum information and entanglement across many nodes and over long distances. These systems are called quantum repeaters and are one of the more complex challenges in current physics research.
Our research program focuses on advancing the development of an interconnected network of quantum repeaters and devices, aimed at creating a quantum internet. Situated at the frontier of atomic physics, quantum optics, and QIST, our experimental approach explores the interaction between single photons and atomic-based quantum communication technologies.
From warm vapor quantum memories to cold atom optical quantum gates, we investigate techniques and physical processes crucial for effectively linking diverse quantum devices. Our primary goal is to enable reliable quantum communication over substantial distances, essential for the realization of a scalable quantum internet infrastructure.
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Collaborations and top research areas from the last five years
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Subaward to Support BNL Research: Towards Distributed Quantum Sensing - Covers Time of Julian Martinez
Figueroa, E. (PI)
10/1/25 → 09/30/26
Project: Research
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Collaborative Research: NeTS: Medium: Optimized Detection and Localization of Events in Quantum Sensor Networks
Gupta, H. S. (PI), Figueroa, E. (CoPI) & Ramakrishnan, C. R. (CoPI)
10/1/25 → 09/30/29
Project: Research
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NQVL: QSTD: Design: SCY-QNet: Wide-Area Quantum Network To Demonstrate Quantum Advantage
Figueroa, E. (PI), Gupta, H. S. (CoPI), Kelly, A. M. (CoI), Kumar, A. (CoI), Ramakrishnan, C. R. (CoI), Schneble, D. A. (CoI) & Wei, T.-C. (CoI)
09/1/25 → 08/31/27
Project: Research
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Deploying Hybrid Quantum/Classical Communication Systems for Smart Grid Data Protection
Figueroa, E. (PI)
10/1/24 → 09/30/26
Project: Research
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NQVL: QSTD: Pilot: SCY-QNet: Wide-Area Quantum Network To Demonstrate Quantum Advantage
Figueroa, E. (PI), Gupta, H. S. (CoPI), Ramakrishnan, C. R. (CoI) & Schneble, D. A. (CoI)
08/15/24 → 07/31/26
Project: Research
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Toward Memory-Assisted Hong-Ou-Mandel Interference Between Two Independent Cavity-Enhanced Photon Pair Sources
Buonocore, E., Gera, S. & Figueroa, E., 2025, Quantum 2.0 in Proceedings Optica Quantum 2.0 Conference and Exhibition. Optical Society of America, QW3A.6. (Quantum 2.0 in Proceedings Optica Quantum 2.0 Conference and Exhibition).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
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Towards Entanglement Swapping over 250 km of Deployed Fiber
Wallace, C., Lodhen, T., Castillo-Veneros, L., Del Valle, A., Du, D., Woronick, S., Katramatos, D., Martínez-Rincón, J., Gera, S. & Figueroa, E., 2025, Quantum 2.0 in Proceedings Optica Quantum 2.0 Conference and Exhibition. Optical Society of America, QW4A.6. (Quantum 2.0 in Proceedings Optica Quantum 2.0 Conference and Exhibition).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
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Development of a 7x7 Grid of Absorptive Quantum Memories
Sehgal, S., Figueroa, E. & Rincón, J. M., 2024, Quantum 2.0 in Proceedings Quantum 2.0 Conference and Exhibition. Optical Society of America, (Quantum 2.0 in Proceedings Quantum 2.0 Conference and Exhibition).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review
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Hong-Ou-Mandel interference of single-photon-level pulses stored in independent room-temperature quantum memories
Gera, S., Wallace, C., Flament, M., Scriminich, A., Namazi, M., Kim, Y., Sagona-Stophel, S., Vallone, G., Villoresi, P. & Figueroa, E., Dec 2024, In: npj Quantum Information. 10, 1, 10.Research output: Contribution to journal › Article › peer-review
Open Access11 Scopus citations -
Quantum Cryptography Network Testbed Connecting Smart Power Grid Nodes
Katramatos, D., Castillo-Veneros, L., Cui, G., Du, D., Woronick, S., Martinez-Rincon, J. & Figueroa, E., 2024, Quantum 2.0 in Proceedings Quantum 2.0 Conference and Exhibition. Optical Society of America, (Quantum 2.0 in Proceedings Quantum 2.0 Conference and Exhibition).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review