Recent questions in Quantum Field Theory

+75 votes

0 answers

How can quantum particles be entangled across time?

asked Jan 16, 2023 in Quantum Field Theory by lord twang

+6 votes

0 answers

If particles are excitations of quantum fields, what is happening when I move a finger? Are new particles (excitations) created in different coordinates or are the original excitations (particles) moving through the field in space like a wave?

asked Jan 16, 2023 in Quantum Field Theory by SeraphicCharm

+21 votes

0 answers

How exactly does Quantum Field Theory explain atomic structures?

asked Jan 16, 2023 in Quantum Field Theory by Richardo

+73 votes

0 answers

Is PBS Spacetime correct in saying that the path integral formulation of QM is "both mathematically equivalent to and more powerful than other formulations," because it's the most easily translated to QFT? If so, why isn't it the default formulation?

asked Jan 16, 2023 in Quantum Field Theory by Knight Rider

+68 votes

0 answers

Regarding the tunnelling of an atom in optical trap, strictly speaking, isn’t it the atom’s electron (not the atom itself, as a whole) which moves through the barrier and which is actually detected by observing the scattered light?

asked Jan 16, 2023 in Quantum Field Theory by genenoel

+133 votes

0 answers

Photons A and B are momentum-entangled. I measure the locality of B just before A meets a double slit. You move relative to me and find that I measure B after A passed the slit. Will you observe that A gives rise to double slit interference pattern?

asked Jan 16, 2023 in Quantum Field Theory by RadiantNova

+5 votes

0 answers

How are the exitations of QFT generated, giving rise to so-called stable particles?

asked Jan 16, 2023 in Quantum Field Theory by Philp1863

+16 votes

0 answers

How does Many Worlds Theory explain the double slit experiment, when the whole point of double slit is that there can be no separate states/splits before a final measurements? Why would world splits happen at the arbitrary final measurement only?

asked Jan 16, 2023 in Quantum Field Theory by ZephyrFlare

+285 votes

0 answers

According to Heisenberg, is quantum theory merely a calculation procedure for predictions?

asked Jan 16, 2023 in Quantum Field Theory by NovaDreamer

+23 votes

0 answers

How did particles get their charge? When the universe began, what made certain particles positive, negative, or neutral?

asked Jan 16, 2023 in Quantum Field Theory by Kris Elder

+276 votes

0 answers

How do particles exist in two places at once?

asked Jan 16, 2023 in Quantum Field Theory by ripitout

+246 votes

0 answers

What is the smallest particle in the universe?

asked Jan 16, 2023 in Quantum Field Theory by ozskins

+18 votes

0 answers

What tool or technique do you think will be responsible for the next breakthrough in experimental physics?

asked Jan 16, 2023 in Quantum Field Theory by Joe1985

+176 votes

0 answers

In double-slit experiment with single atoms/molecules, how does the "gun" actually work? How are the atoms/molecules "launched" to the slits?

asked Jan 16, 2023 in Quantum Field Theory by Dilligaf

+5 votes

0 answers

In a double slit experiment, when a single photon interferes with itself, could it bring any kind of decoherence upon itself, or is decoherence strictly due to interaction with the environment? Could the photon be its own environment, so to speak?

asked Jan 16, 2023 in Quantum Field Theory by VelvetWhirl

0 votes

0 answers

The lambda, xi, sigma, and omega particles belong to which group of highly unstable elementary particles?

asked Jan 15, 2023 in Quantum Field Theory by QuantumSculptor

+118 votes

0 answers

What is the difference between Niels Bohr's and Albert Einstein's theories of quantum mechanics?

asked Jan 15, 2023 in Quantum Field Theory by teamdiy

+14 votes

0 answers

The invariant mass (caused by the Higgs field) of fundamental particles is subject to quantum contextualization that makes it depend on how the experiment is being done or Does this happen only with relativistic mass?

asked Jan 15, 2023 in Quantum Field Theory by SeraphicFlare

+2 votes

0 answers

Is there a version of wicks theorem for the contraction of a field with its four-derivative? Or must you just expand in terms of creation/annihilation operators? Can you pull out the derivative or does time-ordering invalidate this?

asked Jan 15, 2023 in Quantum Field Theory by EmberOracle

+21 votes

0 answers

Which parts of Quantum Field theory must one learn in order to be able to learn about String theory?

asked Jan 15, 2023 in Quantum Field Theory by robertpstubbs (4.3k points)

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Recent questions in Quantum Field Theory

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