All Questions
Tagged with quantum-field-theory quantum-entanglement
73
questions
3
votes
0
answers
96
views
Is it possible to peform thermodynamic work by harvesting entanglement from the vacuum?
I have already asked two questions on this topic:
1. What happens to the vacuum when entanglement is harvested? [closed]
and
2. Does entanglement harvesting require cooling the environment to ...
- 1,488
0
votes
0
answers
295
views
Good book to study entanglement in detail
Can anybody suggest a good book to know about quantum entanglement? I am a master's student and I have good knowledge of quantum mechanics. I want to know more on this subject. It would also be useful ...
2
votes
0
answers
126
views
Why does the no-cloning theorem imply the monogamy of entanglement?
I have seen papers where they mentioned that the monogamy of entanglement can be seen as a consequence of the no-cloning theorem. Could somebody sketch this out?
N.B.: I have seen the argument that ...
- 1,544
1
vote
1
answer
119
views
Constructing orthonormal bases in sub-Hilbert spaces of $L^2(\mathbb R)$ defined for particular spatial regions?
I've explored the entanglement of modes by expanding the ground-state solution of a many-body problem as an infinite sum of Slater determinants of one-particle Hermite functions. The one-particle ...
0
votes
1
answer
67
views
Can you entangle two electrical fields?
Lets say I have two already existing electrical fields. can I entangle them and cause one to influence another. (see image)
- 75
3
votes
1
answer
416
views
What happens to the vacuum when entanglement is harvested?
I stumbled upon this website which talks about entanglement harvesting. I also already asked a question on this subject regarding some experimental question. In this post I want to ask another ...
- 1,488
3
votes
2
answers
511
views
Does entanglement harvesting require cooling the environment to sufficiently low temperatures?
I stumbled upon this webpage, which describe a process they call "entanglement harvesting". I was wondering whether to observe this effect it is necessary to cool the environment to ...
- 1,488
1
vote
1
answer
220
views
Is incompatibility required for contextuality?
A preprint just came out claiming that incompatibilty is not requried to demonstrate generalized contextuality. My question isn't about generalized contextuality---which I don't quite understand---but ...
- 1,325
1
vote
1
answer
162
views
Why are maximally entangled continuous variable states not physical?
I have been going through this paper: https://arxiv.org/abs/quant-ph/9908056
There in, just after eq (1), it's mentioned that maximally entangled continuous variable states are not physical. Why is ...
- 367
1
vote
0
answers
100
views
How does QFT explain QM phenomena?
I've been studying QFT for a couple of years now, and until today I haven't encountered any of the phenomena that I've studied in my QM course: tunneling, entanglement, probability measurements and ...
- 5,931
1
vote
1
answer
253
views
How can anything be unentangled?
If the universe is made of fields that exist everywhere, won’t every point in the universe become entangled with those around it, expanding out at the speed of light? How could two systems nearby one ...
- 749
8
votes
0
answers
259
views
The emergence of space-time from entangled states
I recently read an article by Yasunori Nomura (https://arxiv.org/abs/1711.05263), in which he says that space-time is an emerging phenomenon. At the same time, space-time disappears when the ...
- 956
6
votes
4
answers
541
views
Changing the relative phase of two photons in an Hong-Ou-Mandel interference produces anti-bunching?
What happens to the output of a beam splitter when you change the relative phase between two photons that enter from the two input ports?
In Hong-Ou-Mandel interference for a beamsplitter of the form, ...
- 2,193
1
vote
1
answer
147
views
What is the form of a many-body hamiltonian that are subject to the measurement of the position?
Suppose there is a $N$ body hamiltonian, suppose $N=2$ for simplicity:
$$
H = - \frac{1}{2} \nabla_1^2 - \frac{1}{2} \nabla_2^2 + V(r_1,r_2) + \frac{1}{|r_1 - r_2|}.
$$
If we make a measurement for ...
- 1,356
5
votes
2
answers
131
views
Why does the entanglement of quantum fields depend on their distance?
When watching Seans Carrol's "A Brief History of Quantum Mechanics", he mentioned around the 50th minute (the video I linked to starts at that point) that
[about quantum fields in vacuum] .....
- 516