A group of researchers at Quantinuum, working with a colleague at the University of Texas, Austin, has developed a way to simulate infinitely many chaotic particles using a quantum computer running with finite number of qubits. In their paper published in the journal Nature Physicsthe group describes their technique.
To learn more about how molecules behave in materials, researchers have developed strategies to simulate their behavior on a computer. Such tests work well for simple operations but run into trouble when simulating complexity, such as an infinitely long line of particles interacting over a given period of time. Attempts at traditional supercomputers have failed, and researchers believe that a quantum computer can do the job very well. In this new effort, researchers have found that to be the case.
The researchers claim that the key to running an algorithm capable of dealing with such a problem lies in a design that not only implements the operations required to run the simulation but also adds code that allows the as a simulation run with some qubits. Once they had an algorithm they thought would work, the team turned to hardware. They chose a machine that uses qubits represented by ytterbium atoms—and they changed the number of qubits running from three to 11.
The researchers found that they were able to run their algorithm with a small number of qubits because they built a system that recycles qubits—as a qubit is used, those that have already been used are reset to their original state and then. used again—a technique called holographic dynamics. This process is repeated as the simulation runs. To test the system, the researchers ran a simulation of a process that had already been proven using other techniques. The team plans to test the system in a simulation that cannot be demonstrated using a conventional supercomputer.
The researchers successfully simulated a 64-qubit circuit
Eli Chertkov et al, Holographic dynamics simulations with a trapped quantum computer, Nature Physics (2022). DOI: 10.1038/s41567-022-01689-7
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Citation: Simulating infinitely many chaotic particles with a quantum computer (2022, August 5) retrieved 6 August 2022 from https://phys.org/news/2022-08-simulating-infinitely-chaotic-particles -quantum.html
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