Introduction to Out of Time Order Correlators (OTOCs)(2025)
4 days ago
- #quantum-computing
- #OTOC
- #quantum-chaos
- Out of Time Order Correlators (OTOCs) measure quantum chaos and are verifiable across quantum computers.
- Quantum Echoes algorithm measures OTOCs via forward evolution, perturbation, time reversal, and probing.
- OTOCs exhibit quantum interference, amplifying signals and enabling efficient quantum advantage.
- Higher-order OTOCs reveal complex many-body interference, challenging classical simulation methods.
- Experimental results on 65-qubit Willow device show OTOC measurement efficiency surpassing classical supercomputers.
- OTOCs have practical applications in Hamiltonian learning and molecular structure modeling.
- First quantum computing experiment to measure a verifiable, beyond-classical observable.