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The Quantum Physicist's user avatar
The Quantum Physicist's user avatar
The Quantum Physicist
  • Member for 10 years, 8 months
  • Last seen more than a month ago
49 votes
8 answers
19k views

Why does the speed of light in vacuum have no uncertainty?

16 votes
3 answers
2k views

Reversibility = non-causality. Can this be right?

15 votes
3 answers
12k views

Energy conservation limited by uncertainty principle

9 votes
1 answer
3k views

Why does Quantum Field Theory use Lagrangians rather than Hamiltonians? [duplicate]

8 votes
1 answer
5k views

Hamiltonian matrix off diagonal elements?

6 votes
1 answer
2k views

What are possible ways to construct J-matrices (higher order Pauli matrices)?

5 votes
2 answers
5k views

Neil deGrasse Tyson says that electrons "teleport" between energy levels?

5 votes
1 answer
1k views

What are phase conventions in angular momentum and rotation calculations?

4 votes
1 answer
648 views

Advanced atomic physics: From Liouville Equations to the Bloch equations

4 votes
1 answer
2k views

Why is a Josephson junction important for a SQUID?

4 votes
3 answers
2k views

Uncertainty of permittivity of vacuum

4 votes
1 answer
324 views

Local guage symmety implies causality

4 votes
3 answers
15k views

From power of a laser beam to electric field amplitude

3 votes
1 answer
348 views

Is there a difference between typical spin-spin interaction and Fermi contact interaction from a mathematical point of view?

2 votes
1 answer
281 views

Why is a tensor times its dual a derivative?

2 votes
2 answers
681 views

Rotation of Taylor expansion of a scalar

2 votes
3 answers
281 views

What does “transform among themselves” mean?

2 votes
3 answers
31k views

No uncertainty for standard gravitational acceleration?

2 votes
1 answer
129 views

Energy/Momentum required to deflect earth from its orbit

1 vote
1 answer
836 views

Density matrix and irreducible tensor operators

1 vote
1 answer
414 views

Shouldn't the addition of angular momentum be commutative?

1 vote
1 answer
684 views

Matrix operations on Quantum States in a composite quantum system

1 vote
1 answer
186 views

Rotation operator for a point in a coordinate system linearly derived from Cartesian coordinates

1 vote
1 answer
138 views

Broadband light term in a Hamiltonian

0 votes
0 answers
385 views

First order time-independent perturbation theory: How to practically calculate the perturbed wave-function

0 votes
2 answers
245 views

Quark space tensor product Vs Angular momentum space tensor product