All Questions
Tagged with quantum-entanglement hilbert-space
163
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Maximally entangled states of a qutrit system [closed]
How do I construct a qutrit system and then a maximally entangled state for a qutrit system?
- 309
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2
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125
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Is my simplistic understanding of a Qubit, Superposition and Entanglement correct? [closed]
I've gone through a number of Lenny Susskind's lectures on entanglement (both just for the joy of it and to better understand quantum mechanics) where he delves into the idea of a qubit.
For the sake ...
- 161
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2
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85
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Can you create a pair of entangled particles with asymmetric probabilities of quantum states?
Is it possible to create two entangled particles emitted such that the "left" particle has a different liklihood of being measured in a certain state than the "right" particle?
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259
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Intuition/Motivation behind mixed states
I have some confusion regarding pure, mixed and entangled states and I'm trying to gain some clarity on this.
Set up, and my current understanding:
One fundamental distinction I seem to have (please ...
- 593
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52
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Understanding another Inequality on Entanglement Entropy Found in Hastings Paper on the Area Law
I am currently reading and trying to reproduce the proof found in the following paper by Hastings, in which he proves that the ground state of 1D gapped systems follow an area law. I am trying to ...
- 129
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Understanding an Inequality on Entanglement Entropy Found in Hastings Paper on the Area Law
I am currently reading and trying to reproduce the proof found in the following paper by Hastings, in which he proves that the ground state of 1D gapped systems follow an area law. On the second page, ...
- 129
1
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67
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Two questions about tensor products
I didn't take a linear algebra class in undergrad, but have picked up a fair bit by osmosis when learning QM. I'm hoping someone can help me to understand a particular topic -- namely tensor products.
...
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260
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When is $\rho_{AB} = \rho_{A} \otimes \rho_{B}$ true?
Say $\rho_{AB}$ is the density matrix of the joint system AB, and $\rho_{A}$ ($\rho_{B}$) is the density matrix of system A (system B).
When can one write $\rho_{AB} = \rho_{A} \otimes \rho_{B}$. Is ...
- 592
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1
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115
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Coupled and uncoupled qubits - Hilbert space representation
Suppose I have two situations: one where two qubits, $q_A$ and $q_B$, exist independently (on separate sides of the quantum chip, maybe), and one where they exist with some coupling between them. And ...
- 1,395
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62
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If 2 electrons are entangled $[a] [b]$. if we throw a photon at $-[a]$ will it come out of $[b]-$? [closed]
i was confused as to what will happen when two electrons which are entangled and then if one is exposed to light. will the absorption and emission theory still work and if so how will it work in this ...
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239
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How do I prove that a reduced density matrix has properties of a density matrix?
The properties of a density matrix are defined as follows:
$(1) \ \ \mathrm{Tr}\rho = 1 $
$(2) \ \ \rho^\dagger = \rho $
$(3) \ \ \rho \ge 0 $
$(4) \ \ \mathrm{Tr}\rho^2 \le 1 $
A reduced density ...
- 54
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40
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Why aren't states with 3 basis vectors considered entanglements in two qubit system?
I am going to take out normalization factors for simplicity.
$$|00⟩+|11⟩$$
$$|00⟩−|11⟩$$
$$|10⟩+|01⟩$$
$$|10⟩−|01⟩$$
I can see why these states are entangled but I don't see why the following states ...
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Can local vacuum disentanglement and emergent time offer a new interpretation for properties of particles, modelled as black holes?
The notion that spacetime may emerge from entanglement between factors comprising a Hilbert space decomposition of the vacuum has been suggested by many (for example, M. Van Raamsdonk “Building up ...
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153
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Which Hamiltonians turn disentangled states into entangled ones?
I have been solving example oral-exam questions about quantum mechanics, and I am stuck on the last question:
"Describe the spin
space for $N$ particles of spin 1/2. Give an example of an ...
- 172
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Trouble understanding the math of the preferred basis problem
I've been trying to understand the preferred-basis problem in QM, specifally in the Everettian intepretation.
To quote an answer to another question which discusses this:
In my opinion, the situation ...
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