Preprint
Jul 2026
Fault-Tolerant Heisenberg-Limited Quantum Sensing
This work considers a qubit noise model where the probability of phase-flip errors is exponentially smaller (in qubit number) compared to the probability of bit-flip errors that occur with probability p, and demonstrates that Heisenberg scaling can be attained for times up to T\propto 1/p^{(N+1)/2} for a N-qubit repetition code.
Lorcán O. Conlon, Yu-Xin Wang, E. Abbasgholinejad et al.
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