Pathways for entanglement based quantum communication in the face of high noise

• URL: http://arxiv.org/abs/2011.03005v2
• Date: Sat, 11 Sep 2021 10:31:09 GMT
• Title: Pathways for entanglement based quantum communication in the face of high noise
• Authors: Xiao-Min Hu, Chao Zhang, Yu Guo, Fang-Xiang Wang, Wen-Bo Xing, Cen-Xiao Huang, Bi-Heng Liu, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo, Xiaoqin Gao, Matej Pivoluska and Marcus Huber
• Abstract summary: Entanglement based quantum communication offers an increased level of security in secret shared key distribution. We show that the increased noise resistance of high-dimensional entanglement, can indeed be harnessed for practical key distribution schemes. We certify a secure key at noise levels that would prohibit comparable qubit based schemes from working.
• Score: 4.967015531622526
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entanglement based quantum communication offers an increased level of security in practical secret shared key distribution. One of the fundamental principles enabling this security -- the fact that interfering with one photon will destroy entanglement and thus be detectable -- is also the greatest obstacle. Random encounters of traveling photons, losses and technical imperfections make noise an inevitable part of any quantum communication scheme, severely limiting distance, key rate and environmental conditions in which QKD can be employed. Using photons entangled in their spatial degree of freedom, we show that the increased noise resistance of high-dimensional entanglement, can indeed be harnessed for practical key distribution schemes. We perform quantum key distribution in eight entangled paths at various levels of environmental noise and show key rates that, even after error correction and privacy amplification, still exceed $1$ bit per photon pair and furthermore certify a secure key at noise levels that would prohibit comparable qubit based schemes from working.

Related papers

• Long-distance device-independent quantum key distribution using single-photon entanglement [0.0]
  Device-independent quantum key distribution (DIQKD) allows two honest users to establish secure communication channels. We propose a photonic realization of DIQKD, utilizing a heralded preparation of a single-photon path entangled state.
  arXiv  Detail & Related papers  (2024-09-25T16:39:03Z)
• Overcoming Noise Limitations in QKD with Quantum Privacy Amplification [0.0]
  We show experimentally that QPA is able to increase the secure key rate achievable with QKD by improving the quality of distributed entanglement. We show that QPA enables key generation at noise levels that previously prevented key generation. Results are paramount for the implementation of a global quantum network linking quantum processors and ensuring future-proof data security.
  arXiv  Detail & Related papers  (2024-02-08T14:07:36Z)
• How to harness high-dimensional temporal entanglement, using limited interferometry setups [62.997667081978825]
  We develop the first complete analysis of high-dimensional entanglement in the polarization-time-domain. We show how to efficiently certify relevant density matrix elements and security parameters for Quantum Key Distribution. We propose a novel setup that can further enhance the noise resistance of free-space quantum communication.
  arXiv  Detail & Related papers  (2023-08-08T17:44:43Z)
• Eavesdropper localization for quantum and classical channels via nonlinear scattering [58.720142291102135]
  Quantum key distribution (QKD) offers theoretical security based on the laws of physics. We present a novel approach to eavesdropper location that can be employed in quantum as well as classical channels. We demonstrate that our approach outperforms conventional OTDR in the task of localizing an evanescent outcoupling of 1% with cm precision inside standard optical fibers.
  arXiv  Detail & Related papers  (2023-06-25T21:06:27Z)
• Quantum Key Distribution Using a Quantum Emitter in Hexagonal Boron Nitride [48.97025221755422]
  We demonstrate a room temperature, discrete-variable quantum key distribution system using a bright single photon source in hexagonal-boron nitride. We have generated keys with one million bits length, and demonstrated a secret key of approximately 70,000 bits, at a quantum bit error rate of 6%. Our work demonstrates the first proof of concept finite-key BB84 QKD system realised with hBN defects.
  arXiv  Detail & Related papers  (2023-02-13T09:38:51Z)
• 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)
• Non-local temporal interferometry for highly resilient free-space quantum communication [0.0]
  We present an interstate free-space quantum link, distributing hyper-entanglement over $10.2,$km with flexible dimensionality of encoding. We analyse the achievable key rate in a dimensionally-dimensional QKD protocol that can be optimized with respect to any environmental noise conditions.
  arXiv  Detail & Related papers  (2022-04-15T16:29:37Z)
• Elimination of Noise in Optically Rephased Photon Echoes [1.5729386263718377]
  We propose a noiseless photon-echo protocol based on a four-level atomic system. A storage fidelity of 0.952 is obtained for time-bin qubits encoded with single-photon-level coherent pulses.
  arXiv  Detail & Related papers  (2021-07-21T02:55:09Z)
• Moving beyond the transmon: Noise-protected superconducting quantum circuits [55.49561173538925]
  superconducting circuits offer opportunities to store and process quantum information with high fidelity. Noise-protected devices constitute a new class of qubits in which the computational states are largely decoupled from local noise channels. This Perspective reviews the theoretical principles at the heart of these new qubits, describes recent experiments, and highlights the potential of robust encoding of quantum information in superconducting qubits.
  arXiv  Detail & Related papers  (2021-06-18T18:00:13Z)
• Achieving ultimate noise tolerance in quantum communication [0.0]
  We propose and experimentally demonstrate a platform for quantum communication based on ultrafast optical techniques. By experimentally realizing a 1-ps optically induced temporal gate, we show that ultrafast time filtering can result in an improvement in noise tolerance by a factor of up to 1200.
  arXiv  Detail & Related papers  (2021-02-09T19:55:14Z)
• Quantum noise protects quantum classifiers against adversaries [120.08771960032033]
  Noise in quantum information processing is often viewed as a disruptive and difficult-to-avoid feature, especially in near-term quantum technologies. We show that by taking advantage of depolarisation noise in quantum circuits for classification, a robustness bound against adversaries can be derived. This is the first quantum protocol that can be used against the most general adversaries.
  arXiv  Detail & Related papers  (2020-03-20T17:56:14Z)

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.