Hi all,
tomorrow Zheshen Zhang from MIT will visit the group and give a
presentation at 4pm. As yet, I am unsure of the location, but will keep you
posted.
The title and abstract are as follows:
“Secure Communication via Quantum Illumination”
Entanglement is essential to many quantum information applications, but it
is easily destroyed. Quantum illumination, however, thrives on
entanglement-breaking loss and noise. First proposed for enhancing the
signal-to-noise ratio for detecting a weakly-reflecting target in the
presence of strong background noise, quantum illumination was later shown,
theoretically, to enable high data-rate classical communication that is
immune to passive eavesdropping. In both applications Alice generates a
pair of entangled light beams (signal and idler), retaining the idler and
transmitting the signal. By making a joint measurement on the retained and
returned light, where the latter is either background noise plus target
reflection (for target detection) or Bob's modulated and amplified version
of the signal he received from Alice (for secure communication), quantum
illumination achieves a substantial benefit from its initial entanglement,
despite the roundtrip lossy, noisy propagation channel's having left the
retained and returned light in a separable state. We report the first
experimental demonstration of quantum illumination's passive-eavesdropping
immunity.
Best,
-joe