Quantum error correction of qudits beyond break-even

Nature, Journal Year: 2025, Volume and Issue: 641(8063), P. 612 - 618

Published: May 14, 2025

Hilbert space dimension is a key resource for quantum information processing1,2. Not only large overall an essential requirement error correction, but local can also be advantageous realizing gates and algorithms more efficiently3-7. As result, there has been considerable experimental effort in recent years to develop computing platforms using qudits (d-dimensional systems with d > 2) as the fundamental unit of information8-19. Just qubits, correction these will necessary long run, so far, logical not demonstrated experimentally. Here we report realization error-corrected qutrit (d = 3) ququart 4), which was achieved Gottesman-Kitaev-Preskill bosonic code20. Using reinforcement learning agent21,22, optimized (ququart) ternary (quaternary) memory beyond break-even gain 1.82 ± 0.03 (1.87 0.03). This work represents novel way leveraging harmonic oscillator realize hardware-efficient correction.

Language: Английский

Meet ‘qudits’: more complex cousins of qubits boost quantum computing

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Language: Английский

Qudit-native measurement protocol for dynamical correlations using Hadamard tests

Physical review. A/Physical review, A, Journal Year: 2025, Volume and Issue: 111(4)

Published: April 3, 2025

Language: Английский