On the Speed-up of Wave-like Dark Matter Searches with Entangled Qubits

• URL: http://arxiv.org/abs/2510.11795v1
• Date: Mon, 13 Oct 2025 18:00:11 GMT
• Title: On the Speed-up of Wave-like Dark Matter Searches with Entangled Qubits
• Abstract summary: We analyze the bandwidth and scan rate performance of entangled qubit protocols across different error regimes.<n>We find that the phase-based readout of entangled protocols preserves the search bandwidth independent of qubit number.<n>Applying our analysis to dark photon searches, we find that entangled states of approximately 100 qubits can become competitive.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Qubit-based sensing platforms offer promising new directions for wave-like dark matter searches. Recent proposals demonstrate that entangled qubits can achieve quadratic scaling of the signal in the number of qubits. In this work we expand on these proposals to analyze the bandwidth and scan rate performance of entangled qubit protocols across different error regimes. We find that the phase-based readout of entangled protocols preserves the search bandwidth independent of qubit number, in contrast to power-based detection schemes, thereby achieving a genuine scan-rate advantage. We derive coherence time and error rate requirements for qubit systems to realize this advantage. Applying our analysis to dark photon searches, we find that entangled states of approximately 100 qubits can become competitive with benchmark photon-counting cavity experiments for masses $\gtrsim 30{-}40~\mu{\rm eV}$, provided sufficiently low error rates are achieved. The advantage increases at higher masses where cavity volume scaling becomes less favorable.

Related papers

• Benchmarking Dark Matter Search using a Parity-Check Protocol with Machine-Learning Optimized Pulses [0.0]
  We employ a superconducting transmon qubit dispersively coupled to a double-cavity system.<n>We operate this detector in a regime of increased qubit-cavity coupling, resulting in Stark shifts of 4.6 MHz.<n>We experimentally validate this protocol and demonstrate single-photon detection performance comparable to previous implementations.
  arXiv  Detail & Related papers  (2026-06-24T13:13:44Z)
• Enhancing Kerr-Cat Qubit Coherence with Controlled Dissipation [64.05054054401175]
  Kerr-cat qubit (KCQ) is a bosonic quantum processor.<n>KCQs are experimentally compatible with on-chip architectures and high-fidelity operations.<n>We present direct evidence that the bit-flip time in a KCQ is limited by leakage out of the qubit manifold.
  arXiv  Detail & Related papers  (2025-11-02T17:58:36Z)
• Improved fluxonium readout through dynamic flux pulsing [4.273820097694244]
  In this work, we experimentally demonstrate flux-pulse-assisted readout of a fluxonium qubit. We achieve an assignment fidelity of 94.3% with an integration time of 280 ns. Results constitute the fastest reported readout of a fluxonium qubit.
  arXiv  Detail & Related papers  (2024-11-20T16:25:44Z)
• Complete analysis of a realistic fiber-based quantum repeater scheme [0.8356833388425764]
  We present a quantum repeater protocol for distributing entanglement over long distances.<n>A dedicated communication stage enables trial rates not limited by the travel time between repeater nodes.<n>We analyze the protocol performance for a broad range of experimental parameters and obtain secret key rates ranging from $1 rightarrow 1000$ Hz at a distance of $1000$ km.
  arXiv  Detail & Related papers  (2023-09-08T06:31:06Z)
• Model-based Optimization of Superconducting Qubit Readout [59.992881941624965]
  We demonstrate model-based readout optimization for superconducting qubits. We observe 1.5% error per qubit with a 500ns end-to-end duration and minimal excess reset error from residual resonator photons. This technique can scale to hundreds of qubits and be used to enhance the performance of error-correcting codes and near-term applications.
  arXiv  Detail & Related papers  (2023-08-03T23:30:56Z)
• Enhancing Dispersive Readout of Superconducting Qubits Through Dynamic Control of the Dispersive Shift: Experiment and Theory [47.00474212574662]
  A superconducting qubit is coupled to a large-bandwidth readout resonator. We show a beyond-state-of-the-art two-state-readout error of only 0.25,%$ in 100 ns integration time. The presented results are expected to further boost the performance of new and existing algorithms and protocols.
  arXiv  Detail & Related papers  (2023-07-15T10:30:10Z)
• Qubit readouts enabled by qubit cloaking [49.1574468325115]
  Time-dependent drives play a crucial role in quantum computing efforts. They enable single-qubit control, entangling logical operations, as well as qubit readout. Qubit cloaking was introduced in Lled'o, Dassonneville, et al.
  arXiv  Detail & Related papers  (2023-05-01T15:58:25Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• Mixed-Precision Neural Network Quantization via Learned Layer-wise Importance [50.00102219630088]
  Mixed-precision quantization (MPQ) makes it hard to determine the optimal bit-width for each layer. We propose a joint training scheme that can obtain all indicators at once. For example, MPQ search on ResNet18 with our indicators takes only 0.06 seconds.
  arXiv  Detail & Related papers  (2022-03-16T03:23:50Z)
• Nondestructive detection of photonic qubits [0.0]
  We develop a nondestructive photonic qubit detector that heralds the photon without destroying the encoded qubit. We achieve a nondestructive detection efficiency upon qubit survival of $(79pm3),%$, a photon survival probability of $(31pm1),%$, and preserve the qubit information with a fidelity of $(96.2pm0.3),%$.
  arXiv  Detail & Related papers  (2021-03-26T18:25:06Z)
• Bayesian Bits: Unifying Quantization and Pruning [73.27732135853243]
  We introduce Bayesian Bits, a practical method for joint mixed precision quantization and pruning through gradient based optimization. We experimentally validate our proposed method on several benchmark datasets and show that we can learn pruned, mixed precision networks.
  arXiv  Detail & Related papers  (2020-05-14T16:00:34Z)

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.