Physics and Astronomy Colloquium
Chipping Away at the "N" in NISQ-era Quantum Computers
Presented by Dr. Irfan Siddiqi, Lawrence Berkeley National Laboratory and UC Berkeley
Quantum processors with less than 100 qubits based on superconducting circuitry have recently demonstrated computing power on par with the most advanced classical supercomputers for select problems. This type of noisy, intermediate-scale quantum (NISQ) hardware is, however, prone to errors from materials defects, imperfect control systems, and the leakage of quantum information into unwanted modes. Methods to suppress and correct errors will likely be a must for realizing universal quantum computers. I will describe the major decoherence pathways present in state-of-the-art superconducting quantum processors, and illustrate techniques to maximize the computing power of current devices by engineering materials interfaces, managing electrical crosstalk, and modifying quantum algorithms to incorporate noise-tailoring techniques to run deeper circuits. With these techniques, we have been able to improve the fidelity of quantum simulation algorithms for computing chemical energies, solutions to the transverse-field Ising model, scrambling dynamics in black holes, and nuclear scattering. This event will be given in person, and also on zoom
3:30 pm, Friday, March 25, 2022
PAIS-1100, PAIS
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A schedule of talks within the Department of Physics and Astronomy is available on the P&A web site at http://physics.unm.edu/pandaweb/events/index.php