Security of Quantum Key Distribution 7: Entanglement-Based Protocols

[@Hopegood7031]

I came to KZbin to understand your definition about E91 and get your explanation on KZbin 😂, I like your way of explanation, and your book is just amazing❤ wish you all the best, PhD student from Algeria 🇩🇿

[@shahanaaziz1910]

Thank you for this series of videos. The way you described the topic cleared every point of it for me. looking forward to have more videos on quantum computing and quantum information.

[@RamonaWolf]

Hi Shahana, Thank you for your comment! I am glad you find the videos useful! Best, Ramona

[@MazenAwaraa-yk1ts]

I want to start studying Quantum cryptography. How can I start

[@anonymouslykinda145]

I was a little bit confused in the explanation of the entanglement based BB84 protocol. According to the setup, there is a source that distributes an entangled state, one qubit to Alice, and 1 to Bob, that are entangled. In the explanation, you say alice prepares 2n qubits in the |Phi^+> state, and eventually sends one half of every qubit pair to Bob. But there is no quantum channel between Alice and Bob in the setup. I think it's equivilent to say Eve sends 2n qubit pairs to Alice and Bob, and the rest is the same. However, I don't see where and why Bob would announce that he has received his half of the qubit pairs in this setup.

[@satindersingh7841]

Very Useful and informative Video 😍🌻

[@mishuk2008]

Hi, minute 04:10 , you said the allowed measurements for Alice and Bob. Why can't they choose any measurement to their liking? Why these two sets in particular?

[@RamonaWolf]

Hi Tuhin, the two sets of measurements are designed such that Alice and Bob can achieve the maximum violation of the CHSH inequality in case they share a maximally entangled state (for example, the Phi+ state). With other measurements they might see no CHSH violation even though they share an entangled state. Best, Ramona

[@mohmmadaldarowbi]

Why are the pairs (A2, B1), (A3, B1), and (A3, B2) not used at all in CHSH?

[@sanyamjain840]

Dear Ramona, thanks for the video. Can you please provide some references for the P&B vs EB comparison you did in the last part of the video. Please. Thank You.

[@RamonaWolf]

Hi Sanyam, I got this from Renato Renner's PhD thesis, which you can find here: arxiv.org/abs/quant-ph/0512258 It is shortly discussed in Section 1.2.

[@sanyamjain840]

@@RamonaWolf Thanks :)

[@muhammadusama5075]

please explain ekert protocol part where use quantum observables and some trace concept please explain these steps its difficult to solve. thks mam your video series is good for quantum cryptography

[@leonmozambique533]

Interesting