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Yes, a classical computer can simulate a quantum computer in terms of computational efficiency but it would be limited up to 23 qubits till 2005-2006 using IBM Bluegene supercomputer cluster at Forschungszentrum Juelich in Germany. However, the latest update as per 2017 is a world record of 46 qubits. World Record: Quantum Computer with 46 Qubits simulated ...


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