All Questions
Tagged with coherent-states optics
6
questions
0
votes
1
answer
74
views
Applying a phase shift to a coherent state vs a phase-space rotation (Mach-Zhender)
I'm having some trouble with the physical implementation of a phase vs rotation in phase-space for a coherent state.
Say I have a laser pulse which yields a coherent state $|\alpha\rangle$, I then put ...
- 53
0
votes
0
answers
97
views
What does "Coherent" mean in coherent spectroscopy?
I find this on wiki: "Coherent or resonance spectroscopy are techniques where the radiative energy couples two quantum states of the material in a coherent interaction that is sustained by the ...
- 111
15
votes
2
answers
876
views
Countable basis of coherent states used to express coherent states
Let $|\alpha \rangle$ be coherent state in Fock space. According to the paper "Coherent-state representation for the photon density operator" by Cahill (Phys. Rev. 138, B1566 (1965), §VII), every ...
- 487
2
votes
0
answers
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Diagonalisation of quasi-thermal state
I have the following density operator $$\frac{1}{t \pi N} \int_{\mathbb{C}} \mathrm{d}^2\gamma \exp
\left[
-\frac{|\gamma+r\alpha|^2}{t^2 N}
\right]
|{\gamma}\rangle\langle{\gamma}|,$$
where $0\leq t,...
- 143
4
votes
2
answers
815
views
Can we derive the classical beam-splitter theory from the quantum beam-splitter Fock state picture?
A classical beam splitter divides incoming light into two parts according to the reflection and transmission coefficients.
A quantum beam splitter on the other hand, can be modelled using Fock states,...
- 397
13
votes
3
answers
3k
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Is the vacuum state a coherent state?
I'm asking because I got introduced to the state $|0\rangle$ as a fock-state. Nevertheless:
$$
\hat{a} |0\rangle = 0 |0 \rangle
$$
It is an eigenstate of $\hat{a}$ with eigenvalue $0$, and it can be ...
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