Transceiver designs to attain the entanglement assisted communications capacity

• URL: http://arxiv.org/abs/2208.07979v1
• Date: Tue, 16 Aug 2022 22:37:20 GMT
• Title: Transceiver designs to attain the entanglement assisted communications capacity
• Authors: Ali Cox, Quntao Zhuang, Christos Gagatsos, Boulat Bash and Saikat Guha
• Abstract summary: Pre-shared entanglement can significantly boost communication rates in the high thermal noise and low-brightness transmitter regime. We propose a pair of structured quantum transceiver designs that leverage continuous-variable pre-shared entanglement generated.
• Score: 1.6694381776724387
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Pre-shared entanglement can significantly boost communication rates in the high thermal noise and low-brightness transmitter regime. In this regime, for a lossy-bosonic channel with additive thermal noise, the ratio between the entanglement-assisted capacity and the Holevo capacity - the maximum reliable-communications rate permitted by quantum mechanics without any pre-shared entanglement - scales as $\log(1/{\bar N}_{\rm S})$, where the mean transmitted photon number per mode, ${\bar N}_{\rm S} \ll 1$. Thus, pre-shared entanglement, e.g., distributed by the quantum internet or a satellite-assisted quantum link, promises to significantly improve low-power radio-frequency communications. In this paper, we propose a pair of structured quantum transceiver designs that leverage continuous-variable pre-shared entanglement generated, e.g., from a down-conversion source, binary phase modulation, and non-Gaussian joint detection over a code word block, to achieve this scaling law of capacity enhancement. Further, we describe a modification to the aforesaid receiver using a front-end that uses sum-frequency generation sandwiched with dynamically-programmable in-line two-mode squeezers, and a receiver back-end that takes full advantage of the output of the receiver's front-end by employing a non-destructive multimode vacuum-or-not measurement to achieve the entanglement-assisted classical communications capacity.

Related papers

• Optimal entanglement-assisted electromagnetic sensing and communication in the presence of noise [0.3749861135832072]
  This paper introduces the correlation-to-displacement receiver -- a new architecture comprised of a correlation-to-displacement converter, a programmable mode selector, and a coherent-state information extractor.
  arXiv  Detail & Related papers  (2023-09-22T05:41:06Z)
• Fault-tolerant Coding for Entanglement-Assisted Communication [46.0607942851373]
  This paper studies the study of fault-tolerant channel coding for quantum channels. We use techniques from fault-tolerant quantum computing to establish coding theorems for sending classical and quantum information in this scenario. We extend these methods to the case of entanglement-assisted communication, in particular proving that the fault-tolerant capacity approaches the usual capacity when the gate error approaches zero.
  arXiv  Detail & Related papers  (2022-10-06T14:09:16Z)
• 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)
• Directional Josephson traveling-wave parametric amplifier via non-Hermitian topology [58.720142291102135]
  Low-noise microwave amplification is crucial for detecting weak signals in quantum technologies and radio astronomy. Current amplifiers do not satisfy all these requirements, severely limiting the scalability of superconducting quantum devices. Here, we demonstrate the feasibility of building a near-ideal quantum amplifier using a homogeneous Josephson junction array and the non-trivial topology of its dynamics.
  arXiv  Detail & Related papers  (2022-07-27T18:07:20Z)
• Fulfilling entanglement's optimal advantage via converting correlation to coherence [0.966840768820136]
  Entanglement boosts performance limits in sensing and communication. We propose a conversion module to capture and transform the quantum correlation to coherent quadrature displacement. Our module provides a paradigm of processing noisy quantum correlations for near-term implementation.
  arXiv  Detail & Related papers  (2022-07-14T02:02:52Z)
• Quantum Capacities of Transducers [2.8655318786364408]
  We use the concept of quantum capacity, the highest achievable qubit communication rate through a channel, to quantify the performance of a transducer. We show that the highest continuous-time quantum capacity $Qrm max approx 31.4 g_rm max$ is achieved by transducers with a maximally flat conversion frequency response.
  arXiv  Detail & Related papers  (2022-02-28T19:00:00Z)
• Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module [47.187609203210705]
  We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
  arXiv  Detail & Related papers  (2021-06-09T13:52:27Z)
• 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)
• Direct Quantum Communications in the Presence of Realistic Noisy Entanglement [69.25543534545538]
  We propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement. Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput.
  arXiv  Detail & Related papers  (2020-12-22T13:06:12Z)
• Two-way covert quantum communication in the microwave regime [0.0]
  Quantum communication addresses the problem of exchanging information across macroscopic distances. We advance a new paradigm for secure quantum communication by combining backscattering concepts with covert communication in the microwave regime. This work makes a decisive step toward implementing secure quantum communication concepts in the previously uncharted $1$-$10$ GHz frequency range.
  arXiv  Detail & Related papers  (2020-04-15T16:36:59Z)
• Infinite-fold enhancement in communications capacity using pre-shared entanglement [2.049702429898688]
  Pre-shared entanglement can significantly boost communication rates in the regime of high thermal noise. We propose a structured design of a quantum transmitter and receiver that can harness this purported infinite-fold capacity enhancement.
  arXiv  Detail & Related papers  (2020-01-12T14:05:12Z)

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.