MA2: Distributed Processing, Network Protocols, and Software Development

Major Activity 2: Distributed Processing, Network Protocols, and Software Development  

Research Leads: Eric Chitambar (University of Illinois Urbana-Champaign) & Andrew Cleland (University of Chicago)

Achieving practical distributed quantum computing and networking that leverages hybrid architectures requires new approaches to protocols and software. To tackle this problem, HQAN researchers employ a software toolchain development approach that is concurrent with hardware advancements. This convergent HQAN approach is interdisciplinary—computer science, electrical and computer engineering, mathematics, and physics theory and software researchers will be co-located and embedded with engineers and experimenters at the HQAN testbeds. HQAN researchers will target identifying methods for validating and optimizing distributed, hybrid processors and developing new applications and protocols that take advantage of this architecture. Close-knit interactions with the HQAN partners will leverage key ideas and lessons learned from pioneering activities such as Google Circ, IBM Qiskit, and the IBM Q Experience.  

Project Descriptions

Validation of “Quantumness”: Campbell, Clark, Solomonik, Suchara  Project Contact: Chitambar

The goal of this project is to develop computing entanglement measures for families of multipartite states and experimental tests to certify their values. One focus is on deriving upper and lower bounds on the tensor rank of stabilizer states.  A second research direction is exploring device-independent tests to validate the dimension of quantum channels in general prepare-and-measure networks.  



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Image Credit: Chitambar Lab

Protocols and Applications: Chong, Clerk, Junge, Kwiat, Lutkenhaus, Saffman, Suchara Project Contact: Chitambar

For this project, HQAN researchers will develop low-dimensional quantum communication protocols that can be implemented on HQAN hardware within the next three to five years.  Targeted applications are quantum fingerprinting and distributed phase estimation.  In addition, HQAN researchers are advancing the study of resource costs for implementing nonlocal quantum gates.  



Image Credit: Clark Lab

Tools for Practical Distributed Computation: Campbell, Chitambar, Chong, Clark, Solomonik, Suchara Project Contact: Clerk

We are focusing on developing new theoretical approaches and modelling tools that will allow one to better understand and exploit the properties of hybrid quantum networks, with an explicit focus on near-term experiments.  Our approach incorporates both methods coming from computer science and formal quantum information theory, as well as approaches motivated by theoretical physics.  In the first category, we have been developing new numerical network modeling tools, new approaches to distributed compilation, and methods  incorporating circuit-cutting approaches.  In the second category, work has focused on using methods based on engineering dissipation to stabilize remote entangled states (both continuous-variable photonic states and qubit-like states). 


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Image Credit: Clerk Lab