Benchmarking Optical Receivers for Quantum Communication and Randomness Certification

• URL: http://arxiv.org/abs/2607.25702v1
• Date: Tue, 28 Jul 2026 13:23:59 GMT
• Title: Benchmarking Optical Receivers for Quantum Communication and Randomness Certification
• Abstract summary: The choice of optical receiver determines which properties of the transmitted states remain visible in the observed data.<n>We compare continuous-variable, photon-counting and hybrid receivers within the same prepare-and-measure framework.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The choice of optical receiver determines which properties of the transmitted states remain visible in the observed data and therefore affects the performance of different quantum protocols. We compare continuous-variable, photon-counting and hybrid receivers within the same prepare-and-measure framework, using semi-device-independent randomness generation as the main case study. The measurement device is left uncharacterised, while the source is described by the Gram matrix of its pure signal states using an energy-derived overlap constraint, a magnitude-Gram benchmark or the full complex Gram matrix of a certified coherent phase-shift-keyed constellation. Within this framework, the observed receiver statistics are used to bound $H_{\min}(B|X,Λ)$ against classical side information correlated with the measurement device but independent of the input. For a fixed Gram matrix, this bound is obtained from an exact semidefinite program, with complex multi-input cases treated in block-real form and checked through the corresponding dual certificate. Photon counting alone is phase blind for fixed-modulus phase encoding and therefore certifies no worst-case randomness. Continuous-variable receivers give the highest certified entropy at moderate energy, while under the nominal source calibration a hybrid receiver performs better at low energy when the beacon-region label is retained in the output. The same receiver statistics also provide receiver-level comparisons for discrete-modulated continuous-variable quantum key distribution, quantum reading, covert communication and quantum-signature verification, without replacing the full security analysis required for each protocol.

Related papers

• Semi-device-independent quantum randomness certification in semiconductor spin-noise measurements [0.0]
  Complex solid-state systems are promising platforms for scalable, high-bandwidth quantum random-number generation.<n>We certify randomness that remains private against an adversary holding arbitrary quantum side information.<n>This exceeds the certified entropy rate of earlier spin-noise generators by more than two orders of magnitude.
  arXiv  Detail & Related papers  (2026-09-09T11:09:32Z)
• Efficient Energy-Constrained Semi-Device-Independent QRNG with an Integrated Heterodyne Receiver [0.0]
  We experimentally demonstrate a quantum random number generator within a semi-device-independent QRNG framework.<n>We certify 0.223 bit per measurement, the highest value reported to date for a continuous-variable semi-device-independent QRNG.
  arXiv  Detail & Related papers  (2026-06-22T12:18:55Z)
• Squeezed-state semi-device-independent quantum randomness generation [0.0]
  This paper investigates semi-device-independent quantum randomness generation with a trusted binary pure-state source and an untrusted binary detector.<n>We derive a closed-form Shannon-rate expression for this setting, depending only on the trusted Gram overlap of the two source states.<n>We then apply the result to squeezed-coherent BPSK sources, showing how squeezing changes the trade-off between state distinguishability and certified randomness.
  arXiv  Detail & Related papers  (2026-06-02T16:54:29Z)
• Quantifying Effective Heterodyne Detection Efficiency with SI-Traceable Standards [0.0]
  We present a methodology to determine the effective heterodyne detection efficiency of balanced receivers.<n>We first validate the protocol on a free-space receiver, demonstrating consistency with an independently constructed optical loss chain.<n> Extending the same estimator to a fiber-coupled, polarization-maintaining balanced receiver confirms that the protocol is robust for practical coherent-receiver architectures.
  arXiv  Detail & Related papers  (2026-02-23T19:30:42Z)
• 33 Gbit/s source-device-independent quantum random number generator based on heterodyne detection with real-time FPGA-integrated extraction [0.0]
  High-speed continuous-variable quantum random number generator (QRNG) based on heterodyne detection of vacuum fluctuations.<n>System achieves sustained generation rate of $R_rm net= 33.92mathrmGbit/s$ of uniformly distributed random bits.
  arXiv  Detail & Related papers  (2025-12-08T09:03:42Z)
• Unsupervised Conformal Inference: Bootstrapping and Alignment to Control LLM Uncertainty [49.19257648205146]
  We propose an unsupervised conformal inference framework for generation.<n>Our gates achieve close-to-nominal coverage and provide tighter, more stable thresholds than split UCP.<n>The result is a label-free, API-compatible gate for test-time filtering.
  arXiv  Detail & Related papers  (2025-09-26T23:40:47Z)
• Secure and robust randomness with sequential quantum measurements [0.0]
  We prove a Tsirelson-like boundary for sequential quantum correlations, which represents a trade-off in nonlocality shared by sequential users.<n>Our simple qubit protocol reaches this boundary, and numerical analysis shows improved robustness under realistic noise.<n>This study advances understanding of sequential quantum correlations and offers insights for efficient device-independent protocols.
  arXiv  Detail & Related papers  (2023-09-21T17:50:29Z)
• 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)
• Shannon theory for quantum systems and beyond: information compression for fermions [68.8204255655161]
  We show that entanglement fidelity in the fermionic case is capable of evaluating the preservation of correlations. We introduce a fermionic version of the source coding theorem showing that, as in the quantum case, the von Neumann entropy is the minimal rate for which a fermionic compression scheme exists.
  arXiv  Detail & Related papers  (2021-06-09T10:19:18Z)
• Sample-efficient device-independent quantum state verification and certification [68.8204255655161]
  Authentication of quantum sources is a crucial task in building reliable and efficient protocols for quantum-information processing. We develop a systematic approach to device-independent verification of quantum states free of IID assumptions in the finite copy regime. We show that device-independent verification can be performed with optimal sample efficiency.
  arXiv  Detail & Related papers  (2021-05-12T17:48:04Z)
• Composably secure data processing for Gaussian-modulated continuous variable quantum key distribution [58.720142291102135]
  Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties. We consider a protocol with homodyne detection in the general setting of composable finite-size security. In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
  arXiv  Detail & Related papers  (2021-03-30T18:02:55Z)
• Efficient and robust certification of genuine multipartite entanglement in noisy quantum error correction circuits [58.720142291102135]
  We introduce a conditional witnessing technique to certify genuine multipartite entanglement (GME) We prove that the detection of entanglement in a linear number of bipartitions by a number of measurements scales linearly, suffices to certify GME. We apply our method to the noisy readout of stabilizer operators of the distance-three topological color code and its flag-based fault-tolerant version.
  arXiv  Detail & Related papers  (2020-10-06T18:00:07Z)

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.