Communications of the ACM
IBM Research Reveals Method to Double Size of Quantum Simulations
The researchers said entanglement forging can run larger problems on a quantum processor than previously possible, allowing larger circuits on smaller hardware.
Credit: Bartek Wróblewski/Stock.adobe.com
IBM researchers have doubled the size of quantum simulations while halving the number of quantum bits (qubits) required, via a method called entanglement forging.
The team said the method involves splitting a circuit operating on 2N qubits into two N-qubit halves. The researchers applied it to accurately model the ground state energy of a water molecule, simulating 10 spin-orbitals on five qubits of an IBM quantum processor.
The team said entanglement forging is scalable, and could be implemented across a range of problem structures, to boost the computing power of quantum systems.
IBM's Andrew Eddins said, "We demonstrated a method that in many cases will allow you to run larger problems on your quantum processor than you otherwise could."
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