2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90516We use entropy-energy arguments to assess the limitations on the running time and on the system size, as measured in qubits, of noisy macroscopic circuit-based quantum computers.4 pages; to appear in Proceedings of The Sixth Int'l Conference on Quantum Communication, Measurement, and Computing (QCMC'02)Quantum Physicstext