Presents planar open-boundary quantum LDPC codes with nearest-neighbor iSWAP-based syndrome extraction that outperform rotated surface codes in code-efficiency and logical error rate on finite instances like [[323,14,15]].
Dasuet al., Computing with many encoded logi- cal qubits beyond break-even (2026), arXiv:2602.22211 [quant-ph]
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For single-logical-qubit surface codes with uniform X rotations, the projected logical ensemble after syndrome extraction and maximum-likelihood decoding is isomorphic to scattering-matrix ensembles of chaotic quantum dots in Altland-Zirnbauer classes D or DIII.
Experimental breakeven demonstration of a qLDPC code encoding 4 logical qubits in 18 physical qubits on trapped ions, with up to 9x lower logical error rate than prior superconducting implementations.
Neutral atom platform achieves repeated toric code syndrome extraction with qubit reloading, preserving logical information over 90 cycles and showing distance-dependent logical error suppression.
First digital quantum simulation of an SU(2) bosonic matrix model on Quantinuum H2, with Loschmidt-echo dynamics and a three-way error budget showing post-selection and ZNE give only modest, non-scaling gains.
A modular end-to-end simulation framework jointly models surface-code operations, QPU connectivity, and network constraints to produce execution latency and logical error rate estimates, revealing network-dependent operating regimes for distributed quantum computing.
A trapped-ion architecture based on LDPC codes and cat-state factories achieves 110 logical qubits and one million T gates per day using 2514 physical qubits, with estimates for Heisenberg model simulation on 100 sites in one month using 10000 qubits.
The work identifies a fidelity crossover separating distillation-dominated and no-distillation regimes for remote entanglement in lattice surgery, with up to 100x or >50% resource savings depending on the side of the threshold.
A white paper proposing a six-layer system stack for real-time quantum error correction, with benchmarks of decoders for surface and qLDPC codes and latency models.
citing papers explorer
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Nearest-neighbour gates are all you need: High-rate quantum low-density parity-check codes on a planar grid
Presents planar open-boundary quantum LDPC codes with nearest-neighbor iSWAP-based syndrome extraction that outperform rotated surface codes in code-efficiency and logical error rate on finite instances like [[323,14,15]].
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Projected logical ensembles in surface codes via the random-matrix theory of quantum dots
For single-logical-qubit surface codes with uniform X rotations, the projected logical ensemble after syndrome extraction and maximum-likelihood decoding is isomorphic to scattering-matrix ensembles of chaotic quantum dots in Altland-Zirnbauer classes D or DIII.
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Breakeven demonstration of quantum low-density parity-check codes
Experimental breakeven demonstration of a qLDPC code encoding 4 logical qubits in 18 physical qubits on trapped ions, with up to 9x lower logical error rate than prior superconducting implementations.
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Quantum error correction with the toric code
Neutral atom platform achieves repeated toric code syndrome extraction with qubit reloading, preserving logical information over 90 cycles and showing distance-dependent logical error suppression.
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Simulating the dynamics of an SU(2) matrix model on a trapped-ion quantum computer
First digital quantum simulation of an SU(2) bosonic matrix model on Quantinuum H2, with Loschmidt-echo dynamics and a three-way error budget showing post-selection and ZNE give only modest, non-scaling gains.
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Impact of Network Constraints on Fault-Tolerant Distributed Quantum Computing
A modular end-to-end simulation framework jointly models surface-code operations, QPU connectivity, and network constraints to produce execution latency and logical error rate estimates, revealing network-dependent operating regimes for distributed quantum computing.
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Fault-Tolerant Quantum Computing with Trapped Ions: The Walking Cat Architecture
A trapped-ion architecture based on LDPC codes and cat-state factories achieves 110 logical qubits and one million T gates per day using 2514 physical qubits, with estimates for Heisenberg model simulation on 100 sites in one month using 10000 qubits.
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Remote Entanglement in Lattice Surgery: To Distill, or Not to Distill
The work identifies a fidelity crossover separating distillation-dominated and no-distillation regimes for remote entanglement in lattice surgery, with up to 100x or >50% resource savings depending on the side of the threshold.
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Real-Time Quantum Error Correction System Stack: Architecture, Algorithms, and Engineering Practice
A white paper proposing a six-layer system stack for real-time quantum error correction, with benchmarks of decoders for surface and qLDPC codes and latency models.