Physical qubit (rendered, capped)
Each cube ≈ 1 qubit(s)
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Every claim about quantum computers threatening RSA or ECC encryption hides a hardware bill: Shor's algorithm needs real logical qubits, and every logical qubit needs a surface-code patch of many noisy physical qubits underneath it. This simulator makes that bill explicit and interactive — pick an RSA key size and a physical gate error rate, and watch it compute the logical qubit count, the surface-code distance required to hit a target success probability, the physical-to-logical overhead, and the grand total physical qubit count, rendered as a live 3D cube of glowing qubit nodes and checked against IBM's own public qubit-count roadmap.