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Universal set of scalable dynamically corrected gates for quantum error correction with always-on qubit couplings
1Department of Physics and Astronomy, University of California, Riverside, California 92521, USA.
Physical Review Letters
|August 29, 2014
Summary
We developed high-fidelity quantum gates for error correction using shaped pulses. These gates protect against noise and can run in parallel, enabling efficient quantum computation on surface codes.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Quantum Error Correction
Background:
- Implementing fault-tolerant quantum computation requires robust quantum gates.
- Existing gate constructions face challenges with noise and parallelization.
Purpose of the Study:
- To construct a universal set of high-fidelity quantum gates for sparse bipartite lattices.
- To enable efficient quantum error correction using low-density parity check codes.
Main Methods:
- Utilizing dynamical decoupling sequences with shaped pulses.
- Designing gates for sparse bipartite lattices with always-on Ising couplings.
- Simulating the quantum Zeno effect with a [[4, 2, 2]] toric code.
Main Results:
- Achieved high-fidelity quantum gates resistant to low-frequency phase noise.
- Demonstrated parallel operation of gates on non-neighboring qubits.
- Validated gate performance through simulation of the quantum Zeno effect.
Conclusions:
- The constructed gates are suitable for surface codes and their generalizations.
- This work advances the practical implementation of quantum error correction.
- Enables scalable and efficient quantum computing architectures.
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