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arXiv Detail & Related papers (2026-09-10T20:58:33Z)
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We introduce an integrated framework for loss-tolerant characterization and certification.<n>We develop a certification framework that directly quantifies non-Gaussianity via stellar-rank witnesses and Wigner negativity.<n>By unifying loss-tolerant measurements, state tomography, and non-state certification within a single experimentally accessible framework, our approach provides a practical pathway toward verifying increasingly complex states.
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Passive Imaging with Quantum Advantage [40.27113751459193]
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Continual Quantum Architecture Search with Tensor-Train Encoding: Theory and Applications to Signal Processing [68.35481158940401]
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We demonstrate a reconfigurable network of Mach-Zehnder interferometers entangled via a single squeezed-vacuum resource.<n>We achieve joint noise suppression of $4.36 pm 0.35$ dB below the standard quantum limit at the phase-uncertainty level of $10-9$.
arXiv Detail & Related papers (2025-09-10T02:08:29Z)
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arXiv Detail & Related papers (2025-04-16T18:06:10Z)
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High-quality entangled photon source by symmetric beam displacement design [39.58317527488534]
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Analysis of optical loss thresholds in the fusion-based quantum computing architecture [41.94295877935867]
We show that fault-tolerant quantum computing is possible with currently achievable levels of optical losses in an integrated photonic implementation. Our results show that fault-tolerant quantum computing in the FBQC model is possible with currently achievable levels of optical losses in an integrated photonic implementation.
arXiv Detail & Related papers (2024-03-21T19:54:25Z)
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arXiv Detail & Related papers (2023-11-13T09:46:05Z)
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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]
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arXiv Detail & Related papers (2023-01-27T08:16:26Z)
Integrated Quantum Optical Phase Sensor [48.7576911714538]
We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
arXiv Detail & Related papers (2022-12-19T18:46:33Z)
Protecting the quantum interference of cat states by phase-space compression [45.82374977939355]
Cat states with their unique phase-space interference properties are ideal candidates for understanding quantum mechanics. They are highly susceptible to photon loss, which inevitably diminishes their quantum non-Gaussian features. Here, we protect these non-Gaussian features by compressing the phase-space distribution of a cat state.
arXiv Detail & Related papers (2022-12-02T16:06:40Z)
Combining quantum noise reduction resources: a practical approach [0.0]
We provide the theoretical limits to noise reduction while combining quantum enhanced readout techniques for optomechanical sensors. We demonstrate that backaction evasion through QND techniques dramatically reduces the technical challenges presented when using squeezed light for broadband force detection.
arXiv Detail & Related papers (2022-11-26T02:39:20Z)
Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
arXiv Detail & Related papers (2022-09-06T18:18:41Z)
Circuit Symmetry Verification Mitigates Quantum-Domain Impairments [69.33243249411113]
We propose circuit-oriented symmetry verification that are capable of verifying the commutativity of quantum circuits without the knowledge of the quantum state. In particular, we propose the Fourier-temporal stabilizer (STS) technique, which generalizes the conventional quantum-domain formalism to circuit-oriented stabilizers.
arXiv Detail & Related papers (2021-12-27T21:15:35Z)
Scalable multiphoton quantum metrology with neither pre- nor post-selected measurements [0.0]
We experimentally demonstrate a scalable protocol for quantum-enhanced optical phase estimation. The robustness of two-mode squeezed vacuum states against loss allows us to outperform schemes based on N00N states. Our work is important for quantum technologies that rely on multiphoton interference.
arXiv Detail & Related papers (2020-11-04T18:11:33Z)
Ultimate Limits of Thermal Pattern Recognition [0.0]
We study thermal imaging as an environment localisation task, in which thermal images are modelled as ensembles of Gaussian phase insensitive channels with identical transmissivity. We show that quantum enhanced strategies may be used to provide significant quantum advantage over known optimal classical strategies.
arXiv Detail & Related papers (2020-10-21T09:33:20Z)

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