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Results tagged with quantum-information
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user 12623
Quantum information is the study of the informational content of quantum states. The most common object of study is the "qubit", the information in a two-state quantum system such as spin-1/2 or photon polarization.
4
votes
Accepted
Quantum circuit, two control not gates
Calculating the effect of the second CNOT gate works pretty much as the first one; you just have to carry the state of the third qubit along (this you actually do in case of the first gate with the fi …
- 3,009
1
vote
Why are the equal probabilities for Bell state measurement outcomes essential for "quantum t...
When the probability is the same for all teleported states, the Bell state measurement does not give us any information about the teleported state. That is an important feature of the quantum teleport …
- 3,009
1
vote
Using wavepackets instead of photons in quantum computer
When using quantum optics for quantum computation, you can use also wave packets and not just single photons. There is a whole field of continuous-variable (CV) quantum computing that deals with this …
- 3,009
3
votes
Understanding a Physics Paper on Quantum Teleportation of Continuous variables
I don't know the particulars of this paper, but in general, when teleportation in continuous variables is performed in quantum optics, some coherent state (or superposition of coherent states) is tele …
- 3,009
14
votes
Accepted
Is it possible for more than two particles to be entangled in a quantum way?
Yes, you can have as many entangled particles as you want. It might be rather cumbersome to achieve it but it can in principle be done. Multipartite entangled states actually lie at heart of a special …
- 3,009