# Quantum computing questions from TP

Looks like the questions from TP>SE made their way out here by accident (I think they were supposed to be hand-flagged and migrated which may not have worked out).

I myself don't know much about this topic, so I dunno which of them ought to be migrated. Also, we may want to consider migrating the non-TP questions in while we're at it.

Edit: Looks like there are questions as well. SInce there are 33-is QI questions migrated from TP, I used jQuery on the migrated questions list:

s="";\$('pre')
.contents()
.filter(function() {
return this.nodeType == Node.TEXT_NODE;
}).filter(function(){return !!this.data.match(/(quantum-computing)|(quantum-info)/ig)}).prev().each(function(){s+=this.href+"\n\n";});


Mods, here's the list:

Many body quantum states analyzed as probabilistic sequences

Matlab package: graphical calculus for quantum operations (esp. linear optics)

Spatial and polarizing beam splitters in a graphical calculus

Quantum computing and quantum control

Stabilizer formalism for symmetric spin-states?

direct sum of anyons?

A resource theory of quantum discord?

What is the Holevo-Schumacher-Westmoreland capacity of a Pauli channel?

Explicit construction for unitary extensions of completely positive and trace preserving (CPTP) maps?

State of Matrix Product States

What Shannon channel capacity bound is associated to two coupled spins?

Allowed states vis-a-vis allowed dynamics in generalized probabilistic theories (GPTs)

Accurate quantum state estimation via "Keeping the experimentalist honest"

Operator norm directly from phase space representation of photonic quantum operator

CHSH violation and entanglement of quantum states

Depolarizing threshold for CSS codes

Can the concurrence be calculated in terms of the entanglement of formation?

Constructing a CP map with some decaying property

Quantum memories: What are they?

Unknown quantum state with promise of classical data

Entanglement and conservation

Monte Carlo integration over space of quantum states

Functional relations for Kochen-Specker proofs

States diagonal in the tensor product of Bell states.

Geometric picture behind quantum expanders

What is the physical difference between states and unital completely positive maps?

Looking for description of Helstrom's measurement

partial trace with sparse matrices

What is a Hilbert space filter?

Convert state Vectors to Bloch Sphere angles

What is the use of a Universal-NOT gate?

Counting complete sets of mutually unbiased bases composed of stabilizer states

Principle behind fidelity balance in quantum cloning

Relevance of SIC-POVMs to quantum information

What proof techniques have failed for solving the SIC-POVM problem and what new insights have been gleaned from them?

Decoherence and measurement in NMR

Examples of number theory showing up in physics

• Cool, you've started merging 'em. Carry on :) – Manishearth May 7 '12 at 7:06
• It was just the one I found that needed to be merged... if you see any more that were cross-posts then please flag them, of course, but I don't think there will be much more merging to do. – David Z May 7 '12 at 7:10
• Oops, meant migrate. Both start with an 'm' :/ – Manishearth May 7 '12 at 7:16
• Was summoned here from the teacher's lounge. It might be best to ask the erstwhile TP mods (Joe Fitzsimmons is one who has high rep on cstheory). I'll take a look as well over the next few days – Suresh May 7 '12 at 8:44