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Next Generation of Quantum Algorithms and Materials

          Next Generation of Quantum Algorithms and Materials


Figure: Quantum Computer Simulations

It is anticipated that quantum computing would fundamentally alter how researchers approach challenging computational issues. These computers are created to address significant problems in fundamental scientific fields like quantum chemistry. Quantum computing is still particularly sensitive to environmental disturbances and noise at this point in its development. As a result, quantum bits, or qubits, lose information when they become out of sync, a process known as decoherence, which makes quantum computing "noisy."

Researchers at Pacific Northwest National Laboratory (PNNL) are creating simulations that offer a glimpse into how quantum computers function in order to get around the constraints of current quantum computers.

According to PNNL computer scientist Ang Li, "the quantum states of quantum systems, like qubits, would collapse when we try to directly examine the activity of quantum systems." Li works for two of the five Department of Energy National Quantum Information Science Research Centers, the Quantum Science Center, and the Co-Design Center for Quantum Advantage. To circumvent this, we analyze qubits and their interaction with the environment using simulations.

Li and associates at Oak Ridge National Laboratory and Microsoft create simulators that resemble real quantum devices for running intricate quantum circuits using high-performance computing. To evaluate quantum algorithms, they recently combined two separate simulation types to produce the Northwest Quantum Simulator (NWQ-Sim).


Fig: Model of a Quantum Computer System


Testing quantum algorithms on quantum devices is time-consuming and expensive, and some of the algorithms are too complex for the available quantum devices, according to Li. Our quantum simulators can assist us in testing algorithms for increasingly complex systems and enable us to look beyond the constraints of current equipment.

Writing code for quantum computers is being done in a different way by Nathan Wiebe, a PNNL joint appointee from the University of Toronto and affiliate professor at the University of Washington. Although being constrained by the capabilities of existing quantum devices can occasionally be discouraging, Wiebe sees this issue as an opportunity.


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