#4954 Alternatives to Quantum Computing
#4954 Alternatives to Quantum Computing #4954 What are the various alternatives for types of problems currently requiring quantum computing? Problems often targeted by quantum computers—strongly correlated many-body physics, molecular ground-state estimation, large-scale combinatorial optimization, and prime factorization/discrete logarithms—typically involve state spaces that grow exponentially with problem size ( 2^N ). Because fault-tolerant quantum hardware remains bounded by physical qubit overhead, coherence times, and gate fidelity, a wide spectrum of classical and unconventional computational alternatives handle or approximate these workloads. 1. Quantum Chemistry & Many-Body Physics Alternatives Where quantum targets ground-state energies, dynamic electron correlation, and catalyst modeling (e.g., FeMoco nitrogenase). Tensor Network States (MPS, PEPS, TTN): Decompose the exponentially large Hilbert state vector into contracted local tensors, exploiting low quantu...