5,970 reputation
1340
bio website lac.u-psud.fr/…
location Paris, France
age 38
visits member for 3 years, 5 months
seen yesterday

Researcher in quantum information, mainly on cryptography.


Jan
23
comment Resolution of the EPR paradox using special relativity
Your “solution” has many problem. The easiest to see is the fact that the EPR paradox is exactly the same with slow moving objects like neutrons and atoms.
Nov
12
awarded  Yearling
Oct
8
comment Why is Quantum Teleportation important in Cryptography?
@Martin : In what sense "very good" ? It is clearly secure, easy to analyse, but incredibly difficult to implement.
Oct
8
comment Why is Quantum Teleportation important in Cryptography?
Shifting the problem into something easier to analyse is the whole theoreticians work.
Oct
7
comment Do mirrors have a “resolution” quality to them?
That's for a perfect mirror. The rugosity of the mirror plays a role, and that's why astronomical mirrors are much better polished than a bathroom mirror !
Oct
7
comment Why is Quantum Teleportation important in Cryptography?
@Martin Done ;-)
Oct
7
answered Why is Quantum Teleportation important in Cryptography?
Oct
7
comment Why is Quantum Teleportation important in Cryptography?
@Martin Actually teleportation is essential in many security proof for quantum cryptography.
Oct
2
comment How can electrostatic forces provide lift to the gossamer spider?
If you have an electric field $\vec E$, it generates a force $\vec F=q\vec E$ on any object with charge $q$. A force, if it points upwards, is called lift. I don't understand your "but that's not an explanation about how it generates lift".
Oct
2
comment Coulomb force on the center of a hexagon?
Think about the symmetry of the problem. More specifically, look if some forces cancel out in the centre of the hexagon.
Jul
15
awarded  Nice Answer
Jul
13
awarded  Nice Answer
Jul
11
comment Canonical everyday-life example of a technology that could not work without humans mastering QM in analogy to the application of GR in GPS?
@Mostafa They are not useful for stochastic simulation, because pseudo-random number generator have a much higher rate, and are much cheaper, especially when we don't need cryptographic security.
Jul
10
comment Canonical everyday-life example of a technology that could not work without humans mastering QM in analogy to the application of GR in GPS?
Quantum Random number generator are not really useful for stochastic simulation. But they can be really useful for crypto. These, as well as quantum crypto would not qualify because the OP specifically excludes uncomon applications. However, your precise clock example is a good one, and is useful in GPS, which is the very example the OP likes.
Jun
21
comment What is the volume of electron?
I don't know : the technical level of the question is not the same, even if the physical content is.
Jun
18
reviewed Leave Open Is there an equation that tells you more about the amplitude of an object which is in resonance?
Jun
18
reviewed Leave Open Problem based on Rotational Motion #2
Jun
18
awarded  Custodian
Jun
18
reviewed Leave Open What is the deal with heat capacity?
Jun
14
revised Measuring Entangled Qubits
replace > wuth \rangle, for the kets