INSQT Workshop 2

Session

Space QKD

13 Feb 2023, 15:40

R22 Pickavance Lecture Theatre

Conveners

Space QKD

• Daniel Oi (University of Strathclyde)

Space QKD

• Tim Spiller

Space QKD

• Makan Mohageg (JPL)

4. QKD from Space to Ground at QTLabs

Dr Martin Bohmann (QTLabs GmbH)

13/02/2023, 15:40

We will provide an overview of qtlabs' activities in space-based QKD systems. Building on pioneering work in long-distance free-space QKD and performing down links from a quantum satellite, qtlabs has developed expertise and products for space QKD over the last years. This concerns development of quantum sources for space, mission design and QKD protocols, as well as optical ground stations....

26. Towards Entangled PhotonSources for Space Quantum Coms

Dr Taylor Shields (Craft Prospect)

15/02/2023, 09:10

Recent developments in space quantum communications have highlighted the role robust quantum sources onboard small satellites and CubeSats could play in enabling trustless QKD and helping to implement a global quantum communication network. A major step in this direction would be to perform satellite-to-ground QKD using entanglement-based protocols such as BBM92 where correlations remove the...

27. Emulating Gravitationally-Induced Frequency Shift Towards Space-Based Quantum Optics

Dr Alex Lohrmann (JPL)

15/02/2023, 09:45

Space-based quantum networks require highly efficient quantum links between ground systems on Earth and orbiting spacecraft. A test system at JPL emulated timing desynchronization and polarization rotation driven by the relative motion between Earth and a spacecraft. These dynamics are introduced to a single-photon communication system and addressed using compensation systems. The system...

29. Coincidence Detection QKD protocol

Prof. Ravindra Singh (Physical Research Lab)

15/02/2023, 11:35

We will discuss a method based on coincidence detection to increase the key rate in a prepare and measure protocol. The proposed protocol provides higher key rate compared to the most popular BB84 and Decoy State QKD protocols.

30. Realistic Thread Models for Satellite-based Quantum Key Distribution

Moshen Razavi (University of Leeds)

15/02/2023, 12:10

We study the security of prepare-and-measure satellite-based quantum key distribution (QKD) in restricted eavesdropping scenarios where Eve has limited access to the transmitted signal by Alice. An artefact of such an assumption is the possibility of having bypass channels, those which are not accessible to Eve, but may not necessarily be characterized by the users either. This creates...