Air to ground quantum key distribution

Nauerth, Sebastian; Moll, Francesc; Rau, Markus; Horwath, Joachim; Frick, Stefan; Fuchs, Christian; Weinfurter, Harald

doi:10.1117/12.929790

Cited by 13 publications

(20 citation statements)

References 105 publications

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“…The N ij are the number of coincident counts between Alice's i and Bob's j detectors, where i, j ∈ {+, −}. The simulation begins as with entanglement QKD with the production of entangled photons via (18) and channel transmission loss; the only difference is the angles at which the detection polarisers are set. From the simulated detection probabilities, we find the value of the CHSH parameter and its uncertainty, and thereby determine if the inequality is violated by at least 3σ.…”

Section: C3 Bell Tests and Quantum Teleportationmentioning

confidence: 99%

“…This mode overlap is achievable but can be challenging in real world implementation as it requires very precise alignment and filtering. In the interest of finding the limit Here α is the strength of the coherent state, (18), whose polarization is teleported, with average photon number |α| 2 . Similarly, ε is the strength of the entangled photon state from SPDC, (15), with average number of pairs per pulse 2 sinh 2 ε.…”

Section: C3 Bell Tests and Quantum Teleportationmentioning

confidence: 99%

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A comprehensive design and performance analysis of low Earth orbit satellite quantum communication

et al. 2013

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Optical quantum communication utilizing satellite platforms has the potential to extend the reach of quantum key distribution (QKD) from terrestrial limits of ∼200 km to global scales. We have developed a thorough numerical simulation using realistic simulated orbits and incorporating the effects of pointing error, diffraction, atmosphere and telescope design, to obtain estimates of the loss and background noise which a satellite-based system would experience. Combining with quantum optics simulations of sources and detection, we determine the length of secure key for QKD, as well as entanglement visibility and achievable distances for fundamental experiments. We analyze the performance of a low Earth orbit (LEO) satellite for downlink and uplink scenarios of the quantum optical signals. We argue that the advantages of locating the quantum source on the ground justify a greater scientific interest in an uplink as compared to a downlink. An uplink with a ground transmitter of at least 25 cm diameter and a 30 cm receiver telescope on the satellite could be used to successfully perform QKD multiple times per week with either an entangled photon source or with a weak coherent pulse source, as well as perform long-distance Bell tests and quantum teleportation. Our model helps to resolve important design considerations such as operating wavelength, type and specifications of sources and detectors, telescope designs, specific orbits and ground station locations, in view of anticipated overall system performance.2. Photons undergo a rotation to simulate imperfectly aligned polarization optics, and appropriate losses are applied to the quantum channel.3. Photons are measured resulting in count rate statistics, with added noise accounting for background light and detector dark counts. A realistic detector efficiency is used.4. These statistics are taken in various loss and background count rate regimes to assess optimal and typical expected performance.

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Section: C3 Bell Tests and Quantum Teleportationmentioning

confidence: 99%

Section: C3 Bell Tests and Quantum Teleportationmentioning

confidence: 99%

A comprehensive design and performance analysis of low Earth orbit satellite quantum communication

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The ratio of counts in each basis is used to calculate the S 1,2,3 parameters of the Stokes vectors for each LED. Using the process of [28], the waveplate angles θ Q1 , θ Q2 , θ H are calculated and applied, the intermediate steps of this process are shown in Fig. 10.…”

Section: System Operation 41 Calibrationmentioning

confidence: 99%

A low cost, short range quantum key distribution system

Lowndes

Frick

Hart

et al. 2021

EPJ Quantum Technol.

Self Cite

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We present a miniaturized quantum key distribution system, designed to augment the more mature quantum key distribution systems currently commercially available. Our device is designed for the consumer market, and so size, weight and power are more important than raw performance. To achieve our form factor, the transmitter is handheld and the receiver is a larger fixed terminal. We envisage users would bring their transmitters to centrally located receivers and exchange keys which they could use at a later point. Transmitting qubits at 80 MHz, the peak key rate is in excess of 20 kbps. The transmitter device fits within an envelope of <150 ml, weighs 65 g and consumes 3.15 W of power.

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“…where is the atmosphere field parameter. Optical components at the receiver can also bring additional attenuation , [29]. In this paper, we only consider losses of non-ideal optics 3 dB, and telescope loss, 2.2 dB.…”

Section: Other Types Of Attenuationmentioning

confidence: 99%

Feasibility of quantum key distribution from high altitude platforms

Chu¹,

Donaldson²,

Kumar³

et al. 2021

Quantum Sci. Technol.

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This paper presents the feasibility study of deploying Quantum Key Distribution (QKD) from High Altitude Platforms (HAPs), as a way of securing future communications applications and services. The paper provides a thorough review of the state of the art HAP technologies and summarises the benefits that HAPs can bring to the QKD services. A detailed link budget analysis is presented in the paper to evaluate the feasibility of delivering QKD from stratospheric HAPs flying at 20 km altitude. The results show a generous link budget under most operating conditions which brings the possibility of using diverged beams, thereby simplifying the Pointing, Acquisition and Tracking (PAT) of the optical system on the HAPs and ground, potentially widening the range of future use cases where QKD could be a viable solution.

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Air to ground quantum key distribution

Cited by 13 publications

References 105 publications

A comprehensive design and performance analysis of low Earth orbit satellite quantum communication

A comprehensive design and performance analysis of low Earth orbit satellite quantum communication

A low cost, short range quantum key distribution system

Feasibility of quantum key distribution from high altitude platforms

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