Research by PhD Student Pranav Gokhale and EPiQC Wins IBM Q Best Paper

A new approach for using a quantum computer to realize a near-term “killer app” for the technology received first prize in the 2019 IBM Q Best Paper Award competition, the company announced. The paper, “Minimizing State Preparations in Variational Quantum Eigensolver (VQE) by Partitioning into Commuting Families,” was authored by UChicago CS graduate student Pranav Gokhale and fellow researchers from the Enabling Practical-Scale Quantum Computing (EPiQC) team.

The interdisciplinary team of researchers from UChicago, University of California, Berkeley, Princeton University and Argonne National Laboratory won the $2,500 first-place award for Best Paper. Their research examined how the VQE quantum algorithm could improve the ability of current and near-term quantum computers to solve highly complex problems, such as finding the ground state energy of a molecule, an important and computationally difficult chemical calculation the authors refer to as a “killer app” for quantum computing.

Quantum computers are expected to perform complex calculations in chemistry, cryptography and other fields that are prohibitively slow or even impossible for classical computers. A significant gap remains, however, between the capabilities of today’s quantum computers and the algorithms proposed by computational theorists. 

“VQE can perform some pretty complicated chemical simulations in just 1,000 or even 10,000 operations, which is good,” Gokhale says. “The downside is that VQE requires millions, even tens of millions, of measurements, which is what our research seeks to correct by exploring the possibility of doing multiple measurements simultaneously.”

Gokhale explains the research in this video.

With their approach, the authors reduced the computational cost of running the VQE algorithm by 7-12 times. When they validated the approach on one of IBM’s cloud-service 20-qubit quantum computers, they also found lower error as compared to traditional methods of solving the problem. The authors have shared their Python and Qiskit code for generating circuits for simultaneous measurement, and have already received numerous citations in the months since the paper was published. 

For more on the research and the IBM Q Best Paper Award, see the IBM Research Blog. Additional authors on the paper include Professor Fred Chong and PhD student Yongshan Ding of UChicago CS, Kaiwen Gui and Martin Suchara of the Pritzker School of Molecular Engineering at UChicago, Olivia Angiuli of University of California, Berkeley, and Teague Tomesh and Margaret Martonosi of Princeton University.

Related News

More UChicago CS stories from this research area.
No Name

Argonne scientists use AI to identify new materials for carbon capture

Feb 19, 2024
No Name

New research unites quantum engineering and artificial intelligence

Jan 29, 2024
No Name

Group From UChicago CS To Present Four Papers at Most Prestigious International Quantum Conference

Jan 09, 2024
No Name

UChicago Scientists Make New Discovery Proving Entanglement Is Responsible for Computational Hardness In Quantum Systems

Jul 25, 2023
No Name

Virtual Bakery Game Serves Up Both Cupcakes and Quantum Concepts For K-12 Students

Mar 27, 2023
Students posing at competition
No Name

UChicago Undergrad Team Places Second Overall In Regionals For World’s Largest Programming Competition

Mar 17, 2023
No Name

Assistant Professor Robert Rand Receives Air Force Young Investigator Grant

Dec 19, 2022
Professor Fred Chong advising students
No Name

Prof. Fred Chong Reappointed to National Quantum Initiative Advisory Committee

Dec 13, 2022
No Name

Professor Fred Chong Named IEEE Fellow

Dec 09, 2022
No Name

Associate Professor Diana Franklin Named ACM Distinguished Member

Dec 07, 2022
Haifeng Xu
No Name

New CS and DSI Faculty Haifeng Xu Brings Strategic Intelligence to NeurIPS 2022

Nov 28, 2022
No Name

UChicago CS Research Finds New Angle on Database Query Processing with Geometry

Nov 08, 2022
arrow-down-largearrow-left-largearrow-right-large-greyarrow-right-large-yellowarrow-right-largearrow-right-smallbutton-arrowclosedocumentfacebookfacet-arrow-down-whitefacet-arrow-downPage 1CheckedCheckedicon-apple-t5backgroundLayer 1icon-google-t5icon-office365-t5icon-outlook-t5backgroundLayer 1icon-outlookcom-t5backgroundLayer 1icon-yahoo-t5backgroundLayer 1internal-yellowinternalintranetlinkedinlinkoutpauseplaypresentationsearch-bluesearchshareslider-arrow-nextslider-arrow-prevtwittervideoyoutube