Hardware modelling in space-based quantum networks
ORAL
Abstract
A global quantum internet involves connecting quantum nodes separated by thousands of kilometers. A satellite-based quantum repeater network may offer significant advantages over a ground station-based network given that free-space photon propagation leads to only a polynomially decreasing transmission with distance compared to an exponential decrease in optical fibers [1,2].
To date, most works have considered hardware agnostic models of satellite-based quantum repeaters which has confirmed the promise of the approach but important questions regarding realistic hardware performance in space remain unanswered. Here, I will present a semi-analytical model of a satellite-based quantum network that takes into account hardware losses, both classical (link budget) and quantum (quantum memory time, imperfect qubit operations, etc.). The semi-analytical flavor of the model allows for easy adaptation to different situations and optimization of various elements such as satellite positions. Furthermore, I will present results on achievable quantum communication rates focusing on quantum hardware based on individually trapped neutral atoms which are particularly promising for satellite quantum payloads since they allow for laser cooling and have long coherence times.
[1] C. Liorni et al., “Quantum repeaters in space”, New Journal of Physics, vol.23, 2021
[2] J. Wallnoffer et al., “Simulating quantum repeater strategies for multiple satellites”, Communications Physics, vol. 5, 2022."
To date, most works have considered hardware agnostic models of satellite-based quantum repeaters which has confirmed the promise of the approach but important questions regarding realistic hardware performance in space remain unanswered. Here, I will present a semi-analytical model of a satellite-based quantum network that takes into account hardware losses, both classical (link budget) and quantum (quantum memory time, imperfect qubit operations, etc.). The semi-analytical flavor of the model allows for easy adaptation to different situations and optimization of various elements such as satellite positions. Furthermore, I will present results on achievable quantum communication rates focusing on quantum hardware based on individually trapped neutral atoms which are particularly promising for satellite quantum payloads since they allow for laser cooling and have long coherence times.
[1] C. Liorni et al., “Quantum repeaters in space”, New Journal of Physics, vol.23, 2021
[2] J. Wallnoffer et al., “Simulating quantum repeater strategies for multiple satellites”, Communications Physics, vol. 5, 2022."
–
Presenters
-
Victoria Domínguez Tubío
Delft University of Technology
Authors
-
Victoria Domínguez Tubío
Delft University of Technology