Artur Czerwiński

4 Questions 9 Answers 0 Followers

Questions related from Artur Czerwiński

Is there a relation between Hadamard product and standard matrix product?

We have three square matrices A, B, C of the same dimension. Moreover B and C are positive semidefinite. In my analysis I need to calculate Tr[A.(B*C)], where * denotes the Hadamard product and ....

07 July 2015 2,525 8 View

How do you benefit from social media for researchers?

I believe that Research Gate has brought a great value to the scientific world and it is valuable experience to be a member of such community. I have attended some workshops for scientists in...

06 June 2015 2,043 4 View

Can we get the sufficient number of intensity measurements for a complex vector reconstruction in quantum tomography?

In a paper arXiv:1312.0158 the authors proved that any complex vector (thus also the quantum state vector) can be uniquely determined (up to a global phase factor) by 4N-4 generic intensity...

06 June 2015 8,550 5 View

Can somebody give a reference to a concise proof that the partial trace is completely positive?

I need to proof that the partial trace is a completely positive map. I have seen such proof before, but I just don't remember now. When I google it, they usually state it as a fact without any...

06 June 2015 582 6 View