Timeline for Physical interpretation of entanglement in QFT vacuum
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| May 20, 2017 at 9:59 | comment | added | Rajath Radhakrishnan | The best that could be done so far is proving that 1st law of entanglement entropy implies that anti desiter space obeys linearized einstein's equations. | |
| May 20, 2017 at 9:51 | comment | added | Rajath Radhakrishnan | @StéphaneRollandin Yes, I think the same. It from Qubit Collaboration is about using tools in Quantum Information theory to explore relationships between Gravity and Quantum Field Theory mainly using AdS/CFT and Holographic Entanglement Entropy. But, we are far from concluding that everything is at the most basic level is qubits. | |
| May 20, 2017 at 8:33 | comment | added | Stéphane Rollandin | "From the modern point of view, matters are made of quantum information". Not sure everybody (or even a majority of experts) would agree with this statement. | |
| May 19, 2017 at 15:27 | comment | added | Rajath Radhakrishnan | What does it mean for the quantum fields to be entangled? I went through some more literature on this and have edited the question which I believe has made the question a bit more precise. I request you to provide an answer in the context of the explicitly given entangled state in the question. | |
| May 19, 2017 at 1:44 | comment | added | Everett You | These qubits are the underlying fundamental degrees of freedom that makes up everything (including spacetime, matter, and forces). This is the idea of "It from Qubit", there is a whole summer school on the various aspect of this idea (perimeterinstitute.ca/conferences/it-qubit-summer-school) | |
| May 19, 2017 at 1:35 | comment | added | Everett You | The entanglement is attributed to the fluctuating quantum field. Even if the particle number is zero, the quantum field still has a nonzero fluctuation. Consider the ground state of a simple harmonic oscillator, if you act the number operator $a^\dagger a$ to the ground state, the number is zero, there no particle, but the ground state wave function $\exp(-x^2)$ is not trivial, the position (as well as momentum) of the oscillator is still fluctuating. This is the vacuum fluctuation, and this is where the vacuum entanglement comes from. | |
| May 18, 2017 at 5:36 | comment | added | Rajath Radhakrishnan | Also, is the idea of QFT being an effective description of the collective motion of underlying qubits a mathematically rigorously derived idea? If so, what does these qubits physically represent? | |
| May 18, 2017 at 5:36 | comment | added | Rajath Radhakrishnan | Thank you for taking the time to answer. Even though I have heard about the idea of vacuum being filled with particles could you please give me a mathematical argument for the same. In a free field theory the particle number is conserved and the number operator acting on the ground state gives zero. But, even in free field theories there is entanglement between different regions of spacetime, What can this entanglement be attributed to? | |
| May 17, 2017 at 17:15 | history | answered | Everett You | CC BY-SA 3.0 |