Mahathi Vempati
  • Member for 3 years, 5 months
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1 answers
4 votes
125 views
1 bookmarks
How to find a separable decomposition for $|\Psi^+\rangle\!\langle\Psi^+|+|\Phi^+\rangle\!\langle\Phi^+|$?
1 answers
3 votes
194 views
Proving the inequality $|\mathrm{tr}(AU)|\le \mathrm{tr}|A|$ in Uhlmann's theorem
2 answers
6 votes
1k views
4 bookmarks
Partial trace over a product of matrices - one factor is in tensor product form
2 answers
5 votes
591 views
1 bookmarks
Why are $d^2$ dimensions required to describe a density matrix?
2 answers
7 votes
596 views
1 bookmarks
Is the set of all states with negative conditional Von Neumann entropy convex?
2 answers
5 votes
213 views
Shannon entropy is least when Measurement basis = Mixture basis
1 answers
9 votes
303 views
1 bookmarks
Building Intuition for Relative Von Neumann Entropy
1 answers
4 votes
71 views
Structural Physical Approximation of Partial Transpose
1 answers
3 votes
167 views
For 2x2 and 2x3 systems, is the partial transpose the only positive but not CP operation?
1 answers
4 votes
150 views
How is the expression for the optimal entanglement witness derived?
1 answers
4 votes
299 views
How are witness operators physically implemented?
1 answers
4 votes
204 views
Are entanglement witnesses of this form optimal?
1 answers
5 votes
181 views
1 bookmarks
Equivalent determinant condition for Peres-Horodecki criteria
1 answers
4 votes
247 views
1 bookmarks
Difference between change of basis in bra-ket notation and matrix notation
2 answers
5 votes
331 views
2 bookmarks
How does $\mathcal E(\rho)=\mathrm{Tr}_{env}[U(\rho\otimes\rho_{env})U^\dagger]$ turn into $P_0\rho P_0+P_1\rho P_1$?
2 answers
7 votes
142 views
1 bookmarks
Are there disadvantages in using the inner product between states instead of the fidelity?
1 answers
3 votes
200 views
What can we know about the eigenvalues of a reduced density matrix knowing the eigenvalues of the original matrix?
2 answers
1 votes
654 views
How to write a post-measurement state, if we don't know the measurement result?
2 answers
6 votes
193 views
Diagrammatic Quantum Reasoning: Proving the loop equation using yanking equations
1 answers
2 votes
58 views
1 bookmarks
What is the relevance of preservation of trace in completely postive trace preserving (CPTP) maps?
3 answers
7 votes
875 views
1 bookmarks
How do you send an array of qubits to an operation in Q#?
1 answers
6 votes
694 views
How can we be sure that for every $A$, $A^\dagger A$ has a positive square root?
1 answers
4 votes
138 views
Differentiate between local and global unitaries
0 answers
3 votes
77 views
What do you specify when you physically apply a unitary?
1 answers
5 votes
171 views
What are the standard eigenvalues in $\mathbb{C^2}\otimes\mathbb{C^2}$?
2 answers
5 votes
91 views
Ways in which $\frac{1}{\sqrt 2} (|00\rangle + |11\rangle)$ can be expressed as $\frac{1}{\sqrt 2} (|uu\rangle + |vv\rangle)$
4 answers
6 votes
731 views
1 bookmarks
Maximally mixed states for more than 1 qubit
0 answers
4 votes
94 views
Deutsch Algorithm on a Quantum Turing Machine
1 answers
1 votes
119 views
Quantum Fourier Transform on two qubits: Non orthogonal outputs