Enhancing secure key rates of satellite QKD using a quantum dot single-photon source

• URL: http://arxiv.org/abs/2009.11818v1
• Date: Thu, 24 Sep 2020 16:55:16 GMT
• Title: Enhancing secure key rates of satellite QKD using a quantum dot single-photon source
• Authors: Poompong Chaiwongkhot, Sara Hosseini, Arash Ahmadi, Brendon L. Higgins, Dan Dalacu, Philip J. Poole, Robin L. Williams, Michael E. Reimer, Thomas Jennewein
• Abstract summary: Global quantum secure communication can be achieved using quantum key distribution (QKD) with orbiting satellites. Existing techniques use attenuated lasers as weak coherent pulse (WCP) sources, with so-called decoy-state protocols, to generate the required single-photon-level pulses. We improve on this limitation by using true single-photon pulses generated from a semiconductor quantum dot (QD) embedded in a nanowire.
• Score: 0.5420492913071214
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Global quantum secure communication can be achieved using quantum key distribution (QKD) with orbiting satellites. Established techniques use attenuated lasers as weak coherent pulse (WCP) sources, with so-called decoy-state protocols, to generate the required single-photon-level pulses. While such approaches are elegant, they come at the expense of attainable final key due to inherent multi-photon emission, thereby constraining secure key generation over the high-loss, noisy channels expected for satellite transmissions. In this work we improve on this limitation by using true single-photon pulses generated from a semiconductor quantum dot (QD) embedded in a nanowire, possessing low multi-photon emission ($<10^{-6}$) and an extraction system efficiency of -15 dB (or 3.1%). Despite the limited efficiency, the key generated by the QD source is greater than that generated by a WCP source under identical repetition rate and link conditions representative of a satellite pass. We predict that with realistic improvements of the QD extraction efficiency to -4.0 dB (or 40%), the quantum-dot QKD protocol outperforms WCP-decoy-state QKD by almost an order of magnitude. Consequently, a QD source could allow generation of a secure key in conditions where a WCP source would simply fail, such as in the case of high channel losses. Our demonstration is the first specific use case that shows a clear benefit for QD-based single-photon sources in secure quantum communication, and has the potential to enhance the viability and efficiency of satellite-based QKD networks.

Related papers

• Polarization-encoded quantum key distribution with a room-temperature telecom single-photon emitter [47.54990103162742]
  Single photon sources (SPSs) are directly applicable in quantum key distribution (QKD) We report an observation of polarization-encoded QKD using a room-temperature telecom SPS based on a GaN defect.
  arXiv  Detail & Related papers  (2024-09-25T16:17:36Z)
• Superior decoy state and purification quantum key distribution protocols for realistic quantum-dot based single photon sources [0.35342120781147623]
  We experimentally emulate two simple-to-implement protocols that allow practical, far from ideal sub-Poissonian photon sources to outperform state-of-the-art WCS. By engineering the photon statistics of a quantum dot's biexciton-exciton cascade, we show that either a truncated decoy state protocol or a heralded purification protocol can be employed.
  arXiv  Detail & Related papers  (2024-09-12T11:07:50Z)
• Experimental single-photon quantum key distribution surpassing the fundamental coherent-state rate limit [11.795169912821704]
  Single-photon sources are essential for quantum networks, enabling applications ranging from quantum key distribution (QKD) to the burgeoning quantum internet. Here, we report high-rate QKD using a high-efficiency single-photon source, enabling an SKR transcending the fundamental rate limit of coherent light. Our findings conclusively demonstrate the superior performance of nanotechnology-based single-photon sources over coherent light for QKD applications, marking a pivotal stride towards the realization of a global quantum internet.
  arXiv  Detail & Related papers  (2024-06-04T07:28:15Z)
• A practical transmitter device for passive state BB84 quantum key distribution [0.0]
  Preparation of quantum states within the transmitter device is a significant driver of both complexity and cost. A fully passive state preparation approach elegantly resolves these problems by combining state preparation and QRNG stages into a single optical instrument. We demonstrate our simplified transmitter by establishing a QKD link over a 10 km fiber, generating a secret key rate 110 bits/s.
  arXiv  Detail & Related papers  (2024-05-14T10:08:46Z)
• Experimental demonstration of Continuous-Variable Quantum Key Distribution with a silicon photonics integrated receiver [0.0]
  Quantum Key Distribution (QKD) is a prominent application in the field of quantum cryptography. We present a CV-QKD receiver based on a silicon PIC capable of performing balanced detection.
  arXiv  Detail & Related papers  (2023-11-07T13:27:47Z)
• Experimental demonstration of scalable quantum key distribution over a thousand kilometers [0.0]
  Quantum key distribution offers protection against quantum computer attacks. Long-distance transmission is problematic since the essential signal decay in optical channels occurs at a distance of about a hundred kilometers. We present the experimental demonstration of the TQ-QKD protocol allowing quantum key distribution over 1079 kilometers.
  arXiv  Detail & Related papers  (2023-06-07T16:58:52Z)
• 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)
• QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space [73.86330563258117]
  Single photon source can enhance secure data rates in satellite-based quantum key distribution scenarios. payload is being integrated into a 3U CubeSat and scheduled for launch in 2024 into low Earth orbit.
  arXiv  Detail & Related papers  (2023-01-26T15:34:11Z)
• Efficient room-temperature molecular single-photon sources for quantum key distribution [51.56795970800138]
  Quantum Key Distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way. We introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785nm.
  arXiv  Detail & Related papers  (2022-02-25T11:52:10Z)
• Realizing quantum nodes in space for cost-effective, global quantum communication: in-orbit results and next steps [94.08853042978113]
  SpooQy-1 is a satellite developed at the Centre for Quantum Technologies. It has successfully demonstrated the operation of an entangled photon pair source on a resource-constrained CubeSat platform.
  arXiv  Detail & Related papers  (2021-04-22T02:59:23Z)
• Path-encoded high-dimensional quantum communication over a 2 km multicore fiber [50.591267188664666]
  We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states. A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
  arXiv  Detail & Related papers  (2021-03-10T11:02:45Z)

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.