Erasure conversion for singlet-triplet spin qubits enables high-performance shuttling-based quantum error correction

• URL: http://arxiv.org/abs/2601.10461v1
• Date: Thu, 15 Jan 2026 14:51:01 GMT
• Title: Erasure conversion for singlet-triplet spin qubits enables high-performance shuttling-based quantum error correction
• Authors: Adam Siegel, Simon Benjamin,
• Abstract summary: We present a fault-tolerant framework for quantum error correction based on dual-spin qubits.<n>We show a twofold increase in the error correction threshold and order-of-magnitude reductions in logical error rates.<n>This establishes the singlet-triplet encoding as a practical route toward high-fidelity shuttling and erasure-based quantum computation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Fast and high fidelity shuttling of spin qubits has been demonstrated in semiconductor quantum dot devices. Several architectures based on shuttling have been proposed; it has been suggested that singlet-triplet (dual-spin) qubits could be optimal for the highest shuttling fidelities. Here we present a fault-tolerant framework for quantum error correction based on such dual-spin qubits, establishing them as a natural realisation of erasure qubits within semiconductor architectures. We introduce a hardware-efficient leakage-detection protocol that automatically projects leaked qubits back onto the computational subspace, without the need for measurement feedback or increased classical control overheads. When combined with the XZZX surface code and leakage-aware decoding, we demonstrate a twofold increase in the error correction threshold and achieve orders-of-magnitude reductions in logical error rates. This establishes the singlet-triplet encoding as a practical route toward high-fidelity shuttling and erasure-based, fault-tolerant quantum computation in semiconductor devices.

Related papers

• A spinless spin qubit [0.0]
  All-electrical baseband control of qubits facilitates scaling up quantum processors by removing issues of crosstalk and heat generation.<n>In semiconductor quantum dots, this is enabled by multi-spin qubit encodings, such as the exchange-only qubit.<n>Our design offers a robust and scalable pathway for semiconductor spin qubit technologies.
  arXiv  Detail & Related papers  (2024-12-18T09:38:35Z)
• Fast unconditional reset and leakage reduction in fixed-frequency transmon qubits [5.648269866084686]
  We show a protocol capable of implementing both qubit reset and leakage reduction. In total, the combination of qubit reset, leakage reduction, and coupler reset takes only 83ns to complete. Our protocol also provides a means to both reduce QEC cycle runtime and improve algorithmic fidelity on quantum computers.
  arXiv  Detail & Related papers  (2024-09-25T08:57:41Z)
• Towards early fault tolerance on a 2$\times$N array of qubits equipped with shuttling [0.0]
  Two-dimensional grid of locally-interacting qubits is promising platform for fault tolerant quantum computing. In this paper, we show that such constrained architectures can also support fault tolerance. We demonstrate that error correction is possible and identify the classes of codes that are naturally suited to this platform.
  arXiv  Detail & Related papers  (2024-02-19T23:31:55Z)
• Fault-tolerant quantum architectures based on erasure qubits [49.227671756557946]
  We exploit the idea of erasure qubits, relying on an efficient conversion of the dominant noise into erasures at known locations. We propose and optimize QEC schemes based on erasure qubits and the recently-introduced Floquet codes. Our results demonstrate that, despite being slightly more complex, QEC schemes based on erasure qubits can significantly outperform standard approaches.
  arXiv  Detail & Related papers  (2023-12-21T17:40:18Z)
• Erasure detection of a dual-rail qubit encoded in a double-post superconducting cavity [1.8484713576684788]
  We implement a dual-rail qubit encoded in a compact, double-post superconducting cavity. We measure an erasure rate of 3.981 +/- 0.003 (ms)-1 and a residual dephasing error rate up to 0.17 (ms)-1 within the codespace.
  arXiv  Detail & Related papers  (2023-11-08T01:36:51Z)
• Fast Flux-Activated Leakage Reduction for Superconducting Quantum Circuits [84.60542868688235]
  leakage out of the computational subspace arising from the multi-level structure of qubit implementations. We present a resource-efficient universal leakage reduction unit for superconducting qubits using parametric flux modulation. We demonstrate that using the leakage reduction unit in repeated weight-two stabilizer measurements reduces the total number of detected errors in a scalable fashion.
  arXiv  Detail & Related papers  (2023-09-13T16:21:32Z)
• Near-Term Distributed Quantum Computation using Mean-Field Corrections and Auxiliary Qubits [77.04894470683776]
  We propose near-term distributed quantum computing that involve limited information transfer and conservative entanglement production. We build upon these concepts to produce an approximate circuit-cutting technique for the fragmented pre-training of variational quantum algorithms.
  arXiv  Detail & Related papers  (2023-09-11T18:00:00Z)
• Deep Quantum Error Correction [73.54643419792453]
  Quantum error correction codes (QECC) are a key component for realizing the potential of quantum computing. In this work, we efficiently train novel emphend-to-end deep quantum error decoders. The proposed method demonstrates the power of neural decoders for QECC by achieving state-of-the-art accuracy.
  arXiv  Detail & Related papers  (2023-01-27T08:16:26Z)
• Dual-rail encoding with superconducting cavities [2.003418126964701]
  We introduce the circuit-Quantum Electrodynamics (QED) dual-rail qubit in which our physical qubit is encoded in the single-photon subspace of two superconducting microwave cavities. We describe how to perform a gate-based set of universal operations that includes state preparation, logical readout, and parametrizable single and two-qubit gates.
  arXiv  Detail & Related papers  (2022-12-22T23:21:39Z)
• Universal qudit gate synthesis for transmons [44.22241766275732]
  We design a superconducting qudit-based quantum processor. We propose a universal gate set featuring a two-qudit cross-resonance entangling gate. We numerically demonstrate the synthesis of $rm SU(16)$ gates for noisy quantum hardware.
  arXiv  Detail & Related papers  (2022-12-08T18:59:53Z)
• Fault-tolerant parity readout on a shuttling-based trapped-ion quantum computer [64.47265213752996]
  We experimentally demonstrate a fault-tolerant weight-4 parity check measurement scheme. We achieve a flag-conditioned parity measurement single-shot fidelity of 93.2(2)%. The scheme is an essential building block in a broad class of stabilizer quantum error correction protocols.
  arXiv  Detail & Related papers  (2021-07-13T20:08:04Z)
• Deterministic correction of qubit loss [48.43720700248091]
  Loss of qubits poses one of the fundamental obstacles towards large-scale and fault-tolerant quantum information processors. We experimentally demonstrate the implementation of a full cycle of qubit loss detection and correction on a minimal instance of a topological surface code.
  arXiv  Detail & Related papers  (2020-02-21T19:48:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.