Hi all,
we'll meet in E41.1 at 4pm for the talk. See you then!
-joe
On Thu, May 15, 2014 at 4:51 PM, Joe Renes <joerenes(a)gmail.com> wrote:
> 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
>