New answers tagged quantum-optics
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How do the entangled photons from an SPDC source behave?
Not sure I understand the question, but it seems to be about the local unitaries. What this means is: entanglement is invariant under the application of unitary transformations to a single sub-system. ...
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How do the entangled photons from an SPDC source behave?
If the state of the system is an entangled state, like a singlet
$$
|\Psi^-\rangle = \frac{1}{\sqrt 2} (|\uparrow \downarrow\rangle - |\downarrow \uparrow\rangle)
$$
Then if the first particle ...
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Anti-Hermitian Hamiltonians in Quantum Mechanics and Open Systems
Question: Can the presence of the anti-Hermitian term in Eq. 2 and Eq. 4 be justified or intuitively explained?
It seems that you proposed a mathematical model and is asking for a physical motivation,...
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Anti-Hermitian Hamiltonians in Quantum Mechanics and Open Systems
There seem to be two schools of thought regarding non-Hermitian Hamiltonians. This review by Roccati et al. is a good resource.
The first approach recognizes that such non-Hermitian Hamiltonians can ...
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Anti-Hermitian Hamiltonians in Quantum Mechanics and Open Systems
I understand that this evolution is not unitary, but does this represent a physical process?
If the evolution is not unitary then it is not guaranteed to preserve probability.
But, if it is unitary ...
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Invariance of creation and annihilation operators under mode transformation
You might find it easier start with a simpler finite dimensional example and gradually connect it to the question that you shared.
Let's suppose that you have a finite set of creation/annihilation ...
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