Photonics for Quantum 2 - Shared screen with speaker view
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Hi Jeff — is the essential reason the OPA helps is that it allow you to precise select out only the exact mode of the reflected entangled photon, thereby excluding more noise?
Hi Prof Kwiat,
To my understanding, classical homodyne measurement is mode selective too. I believe with entanglement one can do better than selecting a single mode, in a way that is similar to superdense coding
Is it possible to overcome the limited time-bandwidth product problem at microwave frequencies by exploiting other degrees of freedom such as orbital angular momentum states?
Thank you for the nice talk! Have you considered multiphoton entangled states and their effects on quantum illumination?
Thanks Jeff for a great talk! What about comparison with classical radars that can violate the low brightness requirement? That is, can one envision applications where you can't win with classical techniques where we just turn up the transmitter power?
Thank you for the wonderful talk. Do you think it is possible to implement QI with time-frequency entanglement between two photons?
May be I didn’t understand it correctly. The two papers on microwave quantum illumination, that claims to use QUANTUM two-mode squeezed radar: you say they are actually Classical as the amplifiers break the entanglement. But an actual quantum entanglement radar going through the entanglement breaking channel also suffers entanglement breaking, isn’t it? So, why the two microwave illumination experiments are classical?
Bow tie looks excellent! Iridescent.
thanks for the answer. I understand now.
Let’s say the problem is different — I want to identify a particular shape. I could imagine that spatially structured light would offer an advantage; do I get the same factor of 4 advantage using spatial entanglement, or something else?
What is the intuition for why if you start with an entangled state, have enough loss that you "break" the entanglement, that you can still see an advantage from the source producing entangled light to begin with?
Is this related to superdense coding?
Thanks, Jeff- that was great!