Recent content by Julian Blair

Sorry, I don't quite understand your argument. Alice doesn't know if the "probabilistic case" is in |0> or in |1>, but in either case the qubit is in a 100% state, one or the other. Can you please give me some more details as to how you would use the Rabi oscillations on the two different...

<< All caps removed from post by Moderator >> [/color] A "false" (equally superimposed qubit) is created by mechanically firing with 50/50 probability a resonance photon at a Hydrogen atom qubit in the ground state. This qubit is sent to Alice and it now has 50/50 probability of being in state...

OK, I stand corrected. I see that in the Jaynes -Cummings model, one has Dressed States, which involve Both the Atom and The Field. and that the associated energies are NOT those of the bare states |e> & |g>, but are rather superpositions of these bare states: |e,n> & |g,n+1>. So, now I'm...

Thanks again Cthugha! Unfortunately, I'm not at all well versed in optical quantum physics, so I don't really know some of your terms. I looked at the paper you mentioned and it was definitely doing what I wanted to understand, but was way over my head in the details! I assume that "higher...

If I remember correctly, the Jaynes-Cummings model treats the EM field as being made of "n" photons of frequency ω. Since photons are a QM concept, I don't know why you refer to their field treatment as "Classical." I'm not at all versed in QED, so, no doubt, there are deeper quantum treatments...

If the quantum state of an atom of two energy levels should not be written as |ψ(T)⟩ = 1/ sqrt(2) * (|1⟩-i|2⟩), then I an certainly in good company, because that expression is widely used in discussions of light interacting with atoms. Are you familiar with the James-Cummings Model? Also, I'm...

I'm confused because the James-Cummings model of an EM field interacting with a 2 state atom uses fields of "n" photons of frequency "omega" But, a pulse of time , t = pi/(2*coupling) creates an equally superimposed state, |superimposed states> = 1/(sqrt2) (|1> - i*|2>) . My questions are...

I don't think that this is a stupid question! because I have a similar question involving Rabi oscillations of state probabilities induced by photons or parts of photons. Since this tread is do old, I'll post my question as a new thread.

Thanks Cthugha, you're the first person to reply with an experimental procedure. Unfortunately, I don't completely understand it! By a "stronger pulse" do you mean one at a higher frequency, or do you mean a longer pulse at the resonant frequency? It seems that you are measuring the transmission...

Can someone give me a simple explanation of how to measure the Rabi probability oscillations in a two state atom?

OK, let me explain a bit better. The ground and 1st excited states of an Hydrogen atom are often given as an example of a qubit for use in quantum computing. The energies of these states are definitely eigenstates of the Hamiltonian. My question has to do with an Hydrogen qubit in a superimposed...

Given a 2 state hydrogen atom in a superimposed state, how does one measure it for either of its two states?

I have been studying Ion Traps for quantum computing and was also wondering about conservation of energy in the measurement of superimposed states of the ion. If | ##\psi\rangle = a\cdot |0\rangle + b\cdot |1\rangle## is the state of the ion, then the expected energy would be |a^2|...

Dr. Claude: Thanks for the reference to the Rabi Problem. Now I will have to try to understand that! As I understand Quantum Computing from Prof. Vazirani, manipulations of qubits via various gates is essential. My difficulty is in understanding how an electron can be in a quantum state...

I've been following the EdX course on Quantum Computing by Prof. Vazirani and I don't understand how one physically can create a superimposed state of the ground and 1st excited state of an hydrogen atom. He mentions "the use of light," but doesn't explain the frequency of the light, nor the...