Researchers at the University of Chicago and Argonne National Laboratory significantly have used data compression techniques to fit a 61-qubit simulation of Grover’s quantum search algorithm on a large supercomputer with 0.4 percent error. Other quantum algorithms were also simulated with substantially more qubits and quantum gates than previous efforts.
Today’s practical full-state simulation limit is 48 qubits, because given n qubits, 2n amplitudes are needed to describe the quantum system.
The simulation was performed on the Theta supercomputer at Argonne National Laboratory. Theta consists of 4,392 nodes, each node containing a 64-core Intel Xeon PhiTM processor 7230 with 16 gigabytes of high-bandwidth in-package memory (MCDRAM) and 192 GB of DDR4 RAM. (University of Chicago/Phys.org)