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Quantum Computing
John Watrous's user avatar
John Watrous's user avatar
John Watrous's user avatar
John Watrous
  • Member for 6 years, 8 months
  • Last seen this week
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Top posts
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25
How does the vectorization map relate to the Choi and Kraus representations of a channel?
Mar 31, 2019
answer
16
Advances on imperfect quantum copying
Oct 26, 2018
answer
15
Rigorous security proof for Wiesner's quantum money
Apr 4, 2018
answer
15
What does it mean for a density matrix to "act on a Hilbert space $\mathcal{H}"$?
Jun 21, 2018
answer
14
Who discovered the phase kickback trick?
Feb 7, 2019
answer
14
What is the "complementary map" of a channel with given Kraus decomposition?
Mar 28, 2019
answer
12
Proof of an Holevo information inequality for a classical-classical-quantum channel
May 25, 2018
answer
12
Partial trace over a product of matrices - prove that ${\rm Tr}(\rho^{AB}(\sigma^A\otimes I))={\rm Tr}(\rho^A\sigma^A)$
Dec 28, 2018
answer
12
Prove that the trace distance is upper-bounded by the Hilbert-Schmidt distance
Oct 6, 2022
answer
11
What is the complexity of modulo order-finding problem on classical computer?
Dec 5
Top network posts
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46
complexity of greatest common divisor (gcd)
38
Generalized Ladner's Theorem
35
Is there any connection between the diamond norm and the distance of the associated states?
23
Does the trace norm of the difference of two density matrices being one imply these two density matrices can be simultaneously diagonalizable?
23
What is the Relationship between QMA and AM?