UMD to Lead $1M NSF Project to Develop a Quantum Network to Interconnect Quantum Computers

“We will leverage a quantum network testbed — of our recently-awarded NSF Engineering Research Center: the “Center for Quantum Networks” led by University of Arizona in partnership with MIT, Harvard, Yale and several other institutions — for rapid prototyping, benchmarking and scaling up trapped-ion-based quantum routers to be built in the UMD-led Convergence Accelerator program,” says Saikat Guha.

Watch Live, Wed 8/26: Center for Quantum Networks Briefing

Wednesday, August 26, 2020

1:00 p.m. (MST)

Livestream at

Join leaders as they lay the foundations of the quantum internet, forever changing how we communicate and sense the world around us.


Speakers include:

Saikat Guha, Director
Center for Quantum Networks

Jane Bambauer, Deputy Director
Center for Quantum Networks

Dirk Englund, Deputy Director
Center for Quantum Networks

Dr. Charlie Tahan, Director
National Quantum Coordination Committee
Office of Science and Technology Policy

Dr. Linda Blevins, Deputy Assistant Director
Engineering Directorate
National Science Foundation

Dr. Kon-Well Wang, Ph.D., Division Director
Engineering Education and Centers
National Science Foundation

Thomas Koch, Dean
James C. Wyant College of Optical Sciences


Learn more about the Center

Learn more about our partners

UArizona Awarded $26M NSF Grant to establish center for quantum networks

NSF Announces: New NSF engineering research centers focus on health, transportation, quantum tech and agriculture

NSF Engineering Research Center for Quantum Networks aims to create foundations for the future quantum internet by developing key quantum technologies and new functional building blocks connecting quantum processors over local and global scales. The center involves four partner universities: University of Arizona (lead), Harvard University, Massachusetts Institute of Technology and Yale University.

National Science Foundation invests $104 million to launch four new engineering research centers*

University of Arizona gets $26M grant to help build quantum internet*


Latest Publications 2019

Wave-Function Engineering for Spectrally Uncorrelated Biphotons in the Telecommunication Band Based on a Machine-Learning Framework

C. Cui, R. Arian, S. Guha, N. Peyghambarian, Q. Zhuang, and Z. Zhang. Phys. Rev. Applied 12, 034059 (2019).

On the Stochastic Analysis of a Quantum Entanglement Switch

G. Vardoyan, S. Guha, P. Nain, and D. Towsley. SIGMETRICS Perform. Eval. Rev. 47, 2 (2019)

Percolation-based architecture for cluster state creation using photon-mediated entanglement between atomic memories

Choi, H., Pant, M., Guha, S. et al. npj Quantum Inf 5, 104 (2019).

On the Capacity Region of Bipartite and Tripartite Entanglement Switching and Key Distribution

G. Vardoyan, S. Guha, P. Nain, D. Towsley. QCRYPT 2019 – 9th International Conference on Quantum Cryptography, Aug 2019, Montreal, Canada. pp.1-3. ⟨hal-02424441⟩

Continuous-variable entanglement distillation over a pure loss channel with multiple quantum scissors

K.P. Seshadressan, H. Krovi, S. Guha. Phys. Rev. A 100, 022315 (2019).

A single shot coherent Ising machine based on a network of injection-locked multicore fiber lasers

Babaeian, M., Nguyen, D.T., Demir, V. et al. Nat Commun 10, 3516 (2019).

Secret key distillation over a pure loss quantum wiretap channel under restricted eavesdropping

Z. Pan et al. 2019 IEEE International Symposium on Information Theory (ISIT), Paris, France, 2019.

Covert sensing using floodlight illumination

C. N. Gagatsos, B. A. Bash, A. Datta, Z. Zhang, and S. Guha. Phys. Rev. A 99, 062321 (2019)

Efficient representation of Gaussian states for multimode non-Gaussian quantum state engineering via subtraction of arbitrary number of photons

C.N. Gagatsos, S. Guha. Phys. Rev. A 99, 053816. (2019)

Indistinguishable Photon Source in the 1550-nm Band Optimized by Machine Learning

C. Cui, Y. Xia, S. Guha, N. Peyghambarian and Z. Zhang. 2019 Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, USA, (2019)

A Continuous-Variable Quantum Repeater based on Quantum Scissors

K. P. Seshadreesan, H. Krovi and S. Guha. 2019 Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, USA, (2019)

Attaining the quantum limit of superresolution in imaging an object’s length via predetection spatial-mode sorting

Z. Dutton, R. Kerviche, A. Ashok, S. Guha. Phys. Rev. A 99, 033847 (2019).

Routing entanglement in the quantum internet

Pant, M., Krovi, H., Towsley, D. et al. NPJ Quantum Inf 5, 25 (2019).

Percolation thresholds for photonic quantum computing

Pant, M., Towsley, D., Englund, D. et al. Nat Commun 10, 1070 (2019).

Boosting linear-optical Bell measurement success probability with predetection squeezing and imperfect photon-number-resolving detectors

T. Kilmer and S. Guha. Phys. Rev. A 99, 032302 (2019)

APS Features U of A Quantum Research

New patent!

Holevo capacity achieving joint detection receiver

An optical receiver may include a unitary transformation operator to receive an n-symbol optical codeword associated with a codebook, and to perform a unitary transformation on the received optical codeword to generate a transformed optical codeword, where the unitary transformation is based on the codebook. The optical receiver may further include n optical detectors, where a particular one of the n optical detectors is to detect a particular optical symbol of the transformed optical codeword, and to determine whether the particular optical symbol corresponds to a first optical symbol or a second optical symbol. The optical receiver may also include a decoder to construct a codeword based on the determinations, and to decode the constructed codeword into a message using the codebook. The optical receiver may attain superadditive capacity, and, with an optimal code, may attain the Holevo limit to reliable communication data rates.

Latest Publications (2018)

Quantum-optimal detection of one-versus-two incoherent optical sources with arbitrary separation

Lu, X., Krovi, H., Nair, R. et al. NPJ Quantum Inf 4, 64 (2018).

Continuous-Variable Quantum Repeater Based on Quantum Scissors and Mode Multiplexing

Seshadreesan, K. P., H. Krovi, and S. Guha. Physical Review Research 2.1 (2020): n. pag. Crossref. Web.

Quantum-Limited Discrimination between Laser Light and Noise

J. L. Habif and S. Guha. in Frontiers in Optics / Laser Science, OSA Technical Digest (Optical Society of America, 2018).

Covert Wireless Communication With Artificial Noise Generation

R. Soltani, D. Goeckel, D. Towsley, B. A. Bash and S. Guha. in IEEE Transactions on Wireless Communications, vol. 17, no. 11, pp. 7252-7267, Nov. 2018.

Covert Communications in a Dynamic Interference Environment

D. Goeckel, A. Sheikholeslami, T. Sobers, B. A. Bash, O. Towsley and S. Guha. 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Kalamata, 2018, pp. 1-5.

On a Class of Stochastic Multilayer Network

B. Jiang, P. Nain, D. Towsley, and S. Guha. Proc. ACM Meas. Anal. Comput. Syst. 2, 1, Article 18 (April 2018), 25 pages. DOI:

Multi-Hop Routing in Covert Wireless Networks

A. Sheikholeslami, M. Ghaderi, D. Towsley, B. A. Bash, S. Guha and D. Goeckel. IEEE Transactions on Wireless Communications, vol. 17, no. 6, pp. 3656-3669, June 2018.