A code-switching protocol in the [[8,3,2]] code yields a universal scheme for postselected fault-tolerant quantum computation with quadratic logical error suppression.
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Plaquette compiles realistic quantum hardware noise models into multiple sampler representations, showing that Pauli-twirled approximations can misestimate logical error rates by an order of magnitude compared to leakage-aware and near-Clifford methods.
Finite stellar rank creates a trade-off between state-preparation cost and QEC performance for bosonic codes, with rank k=2 optimized encodings surpassing break-even under dephasing.
A calibration workflow using ELEA and CAFE circuits achieves CZ gate fidelity above 99.9% on an 84-qubit superconducting processor with 0.007% coherent error and median 99.25% across 72 gates.
A symmetry-leveraging framework for fault-tolerant ancilla preparation in quantum BCH codes yields lower spatial overhead and logical error rates than standard distillation in simulations up to 127 qubits.
A new encoding scheme for exp(-iθP) into stabilizer codes like [[n,n-2,2]] and [[5,1,3]] achieves 4-7x lower noise than unencoded versions with at most 3% runs discarded after postselection.
Evolutionary BP+OSD achieves higher decoding performance and lower complexity than standard BP+OSD on surface and QLDPC codes, especially under low-latency constraints.
Global multiqubit Rydberg gates enable break-even measurement-free QEC and lower-shuttling Floquet codes in neutral-atom hardware.
The concatenated dual displacement code suppresses Gaussian displacement error variance by up to 50% under infinite squeezing while correcting lattice-crossing events in CV quantum error correction.
Entanglement boosting protocol prepares logical Bell pairs in rotated surface codes with orders-of-magnitude lower link-limited volume, reaching 10^{-10} logical error from 86 physical pairs at 1% error using soft decoders and postselection within one patch.
The authors propose a catalytic coherence-amplification protocol claimed to recover known quantum states from noisy copies without an error threshold, using 8-32 copies in numerical benchmarks.
Quantum error correction encoding requires energy that scales exponentially with desired precision, varying by code and physical realization.
On small stabilizer-code and Grover circuits, coherent Gaussian noise and Pauli noise rank differently under entropy-matched comparison, and a simplified variance-propagation model matches full simulation only in uncorrected circuits.
The paper identifies four key hurdles in the transition from NISQ to FASQ quantum computers and argues that targeting them will accelerate progress toward useful quantum advantage.
citing papers explorer
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Universal Weakly Fault-Tolerant Quantum Computation via Code Switching in the [[8,3,2]] Code
A code-switching protocol in the [[8,3,2]] code yields a universal scheme for postselected fault-tolerant quantum computation with quadratic logical error suppression.
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Plaquette: A hardware-aware design platform for fault-tolerant quantum computers
Plaquette compiles realistic quantum hardware noise models into multiple sampler representations, showing that Pauli-twirled approximations can misestimate logical error rates by an order of magnitude compared to leakage-aware and near-Clifford methods.
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Bosonic quantum error-correcting codes with finite stellar rank
Finite stellar rank creates a trade-off between state-preparation cost and QEC performance for bosonic codes, with rank k=2 optimized encodings surpassing break-even under dephasing.
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High-Precision Calibration Workflow Achieves Above $99.9\%$ CZ Gate Fidelity on a Scalable Superconducting Processor
A calibration workflow using ELEA and CAFE circuits achieves CZ gate fidelity above 99.9% on an 84-qubit superconducting processor with 0.007% coherent error and median 99.25% across 72 gates.
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Efficient Fault-Tolerant Ancilla Preparation for Quantum BCH codes via Cyclic Symmetry
A symmetry-leveraging framework for fault-tolerant ancilla preparation in quantum BCH codes yields lower spatial overhead and logical error rates than standard distillation in simulations up to 127 qubits.
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Protection of Exponential Operation using Stabilizer Codes in the Early Fault Tolerance Era
A new encoding scheme for exp(-iθP) into stabilizer codes like [[n,n-2,2]] and [[5,1,3]] achieves 4-7x lower noise than unencoded versions with at most 3% runs discarded after postselection.
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Evolutionary BP+OSD Decoding for Low-Latency Quantum Error Correction
Evolutionary BP+OSD achieves higher decoding performance and lower complexity than standard BP+OSD on surface and QLDPC codes, especially under low-latency constraints.
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Multiqubit Rydberg Gates for Quantum Error Correction
Global multiqubit Rydberg gates enable break-even measurement-free QEC and lower-shuttling Floquet codes in neutral-atom hardware.
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A Concatenated Dual Displacement Code for Continuous-Variable Quantum Error Correction
The concatenated dual displacement code suppresses Gaussian displacement error variance by up to 50% under infinite squeezing while correcting lattice-crossing events in CV quantum error correction.
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Entanglement boosting: Low-volume logical Bell pair preparation for distributed fault-tolerant quantum computation
Entanglement boosting protocol prepares logical Bell pairs in rotated surface codes with orders-of-magnitude lower link-limited volume, reaching 10^{-10} logical error from 86 physical pairs at 1% error using soft decoders and postselection within one patch.
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Catalytic Quantum Error Correction: Theory, Efficient Catalyst Preparation, and Numerical Benchmarks
The authors propose a catalytic coherence-amplification protocol claimed to recover known quantum states from noisy copies without an error threshold, using 8-32 copies in numerical benchmarks.
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Energy-error tradeoff in encoding quantum error correction
Quantum error correction encoding requires energy that scales exponentially with desired precision, varying by code and physical realization.
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Continuous Noise Model for Quantum Circuits
On small stabilizer-code and Grover circuits, coherent Gaussian noise and Pauli noise rank differently under entropy-matched comparison, and a simplified variance-propagation model matches full simulation only in uncorrected circuits.
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Mind the gaps: The fraught road to quantum advantage
The paper identifies four key hurdles in the transition from NISQ to FASQ quantum computers and argues that targeting them will accelerate progress toward useful quantum advantage.