In the News
September 15, 2021
Uncertainty in control parameters limits the quality of operations and algorithms on a quantum computer. Typical methods for building operations that are robust to these errors still optimize for the ideal case. In our recent publication (Kang, M. et al., Phys. Rev. Applied 16, 024039, [...]
April 2, 2021
In our new preprint (arXiv: 2104.01119) in collaboration with the MIST lab, we demonstrate a new technique “hidden inverses”, which suppresses slow varying coherent errors in quantum computing circuits efficiently. The “hidden inverses” method reduces control errors by constructing quantum gates [...]
November 3, 2020
Brown lab member, Swarnadeep Majumder, was awarded a Quantum Information Science and Engineering Network (QISE-NET) fellowship. Swarnadeep will be a part of the third cohort of the QISE-NET program, an NSF funded national training program for graduate students pursuing careers in quantum science [...]
September 17, 2020
A new work has been posted on the arXiv entitled 'Extended Flag Gadgets for Low-Overhead Circuit Verification.' In this work we propose an extension to the flag qubit framework which can be applied in a more general setting. Our gadgets can detect faults on generic unitaries, and are low overhead [...]
August 20, 2020
Our new preprint on coupling molecular and atomic ion qubits can be found at arXiv:2008.09201 .This work is in collaboration with the Eric Hudson and Wes Campbell groups at UCLA and Michael Heaven at Emory University. In this article we discuss a novel laser-free method of using an atomic ion for [...]
April 10, 2020
New paper published in the International Symposium on Computer Architecture (ISCA2020)!
March 13, 2020
Leakage is a particularly damaging error that occurs when a qubit leaves the defined computational subspace.
March 12, 2020
Our detailed study of photon-mediated charge exchange between cold Potassium atoms and calcium ions is published in the journal Physical Chemistry Chemical Physics.
January 13, 2020
Brown lab at QIP2020 in Shenzhen. Posters about quantum error correction by Natalie, Shilin, Dripto, and Muyuan. Talks about quantum error correction by Mike and Ken.
November 13, 2019
Brown lab attended the Southeastern Section of the American Physical Society (SESAPS) in Wilmington.
October 18, 2019
Swarnadeep Majumder attended the Assessing Performance of Quantum Computers (APQC) workshop in Estes Park, CO and presented a poster on Real Tiime Calibration Using Spectator Qubits.
October 17, 2019
Quantum information is delicate. To preserve it, we must constantly interact with our system in order to remove errors.
August 5, 2019
Cold molecular ions are good candidates for precision measurements such as the time variation of proton to electron mass ratio.
August 4, 2019
Brown lab attended the 5th International Conference on Quantum Error Correction in London.
July 16, 2019
Quantum computers promise to be a technological revolution, but they will only be possible if the error rate of quantum bits (qubits) is kept under a manageable level. Many techniques have been developed to control, mitigate, and correct quantum errors, and the most appropriate choice depends [...]