Information and coding
Recovering and transmitting information when observations are incomplete or noisy.
5 problemsCommunication systems
Transmitting information through physical links and networks.
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Browse collectionsElectronics and photonics
Lasers, clocks, analog circuits and devices for moving quantum information through optical networks.
7 problemsInformation and coding
The capacity and reliability of communication through noise, deletions and networks.
5 problemsA few problems to explore
8 totalAll-photonic quantum repeaters
Can photonic repeaters distribute useful entanglement over many links without long-lived matter memories?
Mobile terahertz beam management
Can narrow high-frequency wireless beams stay connected through movement and blockage without excessive tracking cost?
Microwave–optical quantum transduction
Can a practical interface transfer quantum information between microwave circuits and optical links with little loss or added noise?
Binary deletion channel capacity
What is the exact reliable information rate when bits disappear independently and the receiver cannot see where they were removed?
Worst-case trace reconstruction
Do polynomially many independently damaged copies always suffice to recover every unknown binary string exactly?
Shannon capacity of the seven-cycle
Seven symbols sit around a circle, and neighboring symbols can be confused. How many messages can long strings of these symbols carry with absolutely no decoding mistakes?