Details
| Original language | English |
|---|---|
| Article number | 24 |
| Journal | EPJ Quantum Technology |
| Volume | 12 |
| Issue number | 1 |
| Publication status | Published - 14 Feb 2025 |
| Externally published | Yes |
Abstract
High relative velocities and large distances in space-based quantum communication with satellites in lower earth orbits can lead to significant Doppler shifts and delays of the signal impairing the achievable performance if uncorrected. We analyze the influence of systematic and stochastic Doppler shift and delay in the specific case of a continuous variable quantum key distribution (CV-QKD) protocol and identify the generalized correlation function, the ambiguity function, as a decisive measure of performance loss. Investigating the generalized correlations as well as private capacity bounds for specific choices of spectral amplitude shape (Gaussian, single- and double-sided Lorentzian), we find that this choice has a significant impact on the robustness of the quantum communication protocol to spectral and temporal synchronization errors. We conclude that optimizing the pulse shape can be a building block in the resilient design of quantum network infrastructure.
Keywords
- Delay, Doppler shift, Quantum key distribution, Quantum technology, Satellite communication, Space-based quantum communication
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
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In: EPJ Quantum Technology, Vol. 12, No. 1, 24, 14.02.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Pulse shape optimization against Doppler shifts and delays in optical quantum communication
AU - Schlake, Emanuel
AU - Barzel, Roy
AU - Rätzel, Dennis
AU - Lämmerzahl, Claus
N1 - Publisher Copyright: © The Author(s) 2025.
PY - 2025/2/14
Y1 - 2025/2/14
N2 - High relative velocities and large distances in space-based quantum communication with satellites in lower earth orbits can lead to significant Doppler shifts and delays of the signal impairing the achievable performance if uncorrected. We analyze the influence of systematic and stochastic Doppler shift and delay in the specific case of a continuous variable quantum key distribution (CV-QKD) protocol and identify the generalized correlation function, the ambiguity function, as a decisive measure of performance loss. Investigating the generalized correlations as well as private capacity bounds for specific choices of spectral amplitude shape (Gaussian, single- and double-sided Lorentzian), we find that this choice has a significant impact on the robustness of the quantum communication protocol to spectral and temporal synchronization errors. We conclude that optimizing the pulse shape can be a building block in the resilient design of quantum network infrastructure.
AB - High relative velocities and large distances in space-based quantum communication with satellites in lower earth orbits can lead to significant Doppler shifts and delays of the signal impairing the achievable performance if uncorrected. We analyze the influence of systematic and stochastic Doppler shift and delay in the specific case of a continuous variable quantum key distribution (CV-QKD) protocol and identify the generalized correlation function, the ambiguity function, as a decisive measure of performance loss. Investigating the generalized correlations as well as private capacity bounds for specific choices of spectral amplitude shape (Gaussian, single- and double-sided Lorentzian), we find that this choice has a significant impact on the robustness of the quantum communication protocol to spectral and temporal synchronization errors. We conclude that optimizing the pulse shape can be a building block in the resilient design of quantum network infrastructure.
KW - Delay
KW - Doppler shift
KW - Quantum key distribution
KW - Quantum technology
KW - Satellite communication
KW - Space-based quantum communication
UR - http://www.scopus.com/inward/record.url?scp=85218341149&partnerID=8YFLogxK
U2 - 10.1140/epjqt/s40507-025-00321-w
DO - 10.1140/epjqt/s40507-025-00321-w
M3 - Article
VL - 12
JO - EPJ Quantum Technology
JF - EPJ Quantum Technology
IS - 1
M1 - 24
ER -