Enhancing Quantum Dense Coding Robustness Using Information Entropy-Based Metrics

• URL: http://arxiv.org/abs/2504.12565v1
• Date: Thu, 17 Apr 2025 01:29:40 GMT
• Title: Enhancing Quantum Dense Coding Robustness Using Information Entropy-Based Metrics
• Authors: Syed Emad Uddin Shubha, Tasnuva Farheen,
• Abstract summary: Superdense Coding is a cornerstone in secure quantum communication, exploiting pre-shared entanglement to encode two classical bits within a single qubit.<n>Traditional methods, such as error correcting codes or entanglement distillation, are generally inadequate for dynamically varying noise conditions.<n>This work introduces an adaptive protocol that integrates the five-qubit perfect code with a novel global adaptive purification that avoids discarding entangled pairs.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Superdense Coding is a cornerstone in secure quantum communication, exploiting pre-shared entanglement to encode two classical bits within a single qubit. However, noise and decoherence deteriorate entanglement quality, restricting both fidelity and channel capacity in practical settings. Traditional methods, such as error correcting codes or entanglement distillation, are generally inadequate for dynamically varying noise conditions. Moreover, reliance on fidelity alone may fail to capture more subtle noise effects. This work introduces an adaptive protocol that integrates the five-qubit perfect code with a novel global adaptive purification that avoids discarding entangled pairs. By monitoring two information entropy-based metrics, quantum discord (QD) and entanglement of formation (EoF) from pilot pairs, we dynamically tune a global unitary to counteract noise. Our simulations, under both amplitude and phase damping, indicate that this integrated strategy could significantly enhance superdense coding robustness while preserving high throughput, thereby offering a scalable pathway toward a high-capacity quantum internet.

Related papers

• Performance and achievable rates of the Gottesman-Kitaev-Preskill code for pure-loss and amplification channels [2.955647071443854]
  We analytically obtain the near-optimal performance of any Gottesman-Kitaev-Preskill code under pure loss and pure amplification.<n>Our results establish GKP code as the first structured bosonic code family that achieves the capacity of loss and amplification.
  arXiv  Detail & Related papers  (2024-12-09T18:03:31Z)
• Optimal and robust error filtration for quantum information processing [0.0]
  Error filtration is a hardware scheme that mitigates noise by exploiting auxiliary qubits and entangling gates.<n>We benchmark our approach against figures of merit that correspond to different applications.
  arXiv  Detail & Related papers  (2024-09-02T17:58:44Z)
• Continuous variable dense coding under realistic non-ideal scenarios [0.0]
  We derive a general formalism for the dense coding capacity (DCC) of generic two-mode Gaussian states. We investigate the pattern of DCC of the two-mode squeezed vacuum state (TMSV) by varying the strength of the noise.
  arXiv  Detail & Related papers  (2024-07-10T12:49:17Z)
• 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)
• An efficient combination of quantum error correction and authentication [1.1602089225841632]
  We study whether it can be done more efficiently by combining the two functionalities in a single code. We show that the threshold code needs polylogarithmically fewer qubits to achieve the same level of security and robustness.
  arXiv  Detail & Related papers  (2022-11-17T17:25:39Z)
• 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)
• Optimal quantum control via genetic algorithms for quantum state engineering in driven-resonator mediated networks [68.8204255655161]
  We employ a machine learning-enabled approach to quantum state engineering based on evolutionary algorithms. We consider a network of qubits -- encoded in the states of artificial atoms with no direct coupling -- interacting via a common single-mode driven microwave resonator. We observe high quantum fidelities and resilience to noise, despite the algorithm being trained in the ideal noise-free setting.
  arXiv  Detail & Related papers  (2022-06-29T14:34:00Z)
• Data post-processing for the one-way heterodyne protocol under composable finite-size security [62.997667081978825]
  We study the performance of a practical continuous-variable (CV) quantum key distribution protocol. We focus on the Gaussian-modulated coherent-state protocol with heterodyne detection in a high signal-to-noise ratio regime. This allows us to study the performance for practical implementations of the protocol and optimize the parameters connected to the steps above.
  arXiv  Detail & Related papers  (2022-05-20T12:37:09Z)
• 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)
• Dynamically Corrected Nonadiabatic Holonomic Quantum Gates [2.436681150766912]
  The noise-resilience feature of nonadiabatic holonomic quantum computation (NHQC) still needs to be improved. We propose a general protocol of universal NHQC with simplified control, which can greatly suppress the effect of accompanied X errors. Numerical simulation shows that the performance of our gate can be much better than previous protocols.
  arXiv  Detail & Related papers  (2020-12-16T15:52:38Z)
• Entanglement-assisted entanglement purification [62.997667081978825]
  We present a new class of entanglement-assisted entanglement purification protocols that can generate high-fidelity entanglement from noisy, finite-size ensembles. Our protocols can deal with arbitrary errors, but are best suited for few errors, and work particularly well for decay noise.
  arXiv  Detail & Related papers  (2020-11-13T19:00:05Z)
• 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.