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Top Questions
55 votes

Functions that are Riemann integrable but not Lebesgue integrable

integration lebesgue-integral asked May 23, 2017 at 19:47
math.stackexchange.com

36 votes

Why didn't House Atreides stay on Caladan?

dune asked Jul 7, 2021 at 16:52
scifi.stackexchange.com

26 votes

Why is the ground state important in condensed matter physics?

quantum-mechanics condensed-matter hilbert-space hamiltonian ground-state asked Nov 4, 2020 at 8:14
physics.stackexchange.com

20 votes

What is the relation between non-local order parameters and topological phases?

condensed-matter phase-transition topological-order topological-phase critical-phenomena asked Nov 5, 2020 at 20:58
physics.stackexchange.com

13 votes

To what extent is standard quantum mechanics actually non-relativistic?

quantum-mechanics quantum-field-theory special-relativity schroedinger-equation second-quantization asked Feb 6, 2020 at 16:31
physics.stackexchange.com

13 votes

What is meant exactly by "renormalization" in condensed matter physics, specifically in density matrix renormalization group (DMRG)?

condensed-matter renormalization computational-physics spin-chains tensor-network asked Dec 6, 2019 at 13:00
physics.stackexchange.com

13 votes

Why doesn't the Gottesman-Knill theorem render quantum computing almost useless?

simulation nonclassicality gottesman-knill asked Jul 31, 2019 at 8:59
quantumcomputing.stackexchange.com

10 votes

Do channels which do not affect a subsystem always have the form $\mathcal E=\mathcal T_{\mathcal A}\otimes\text{id}_B$?

quantum-mechanics quantum-information asked Apr 3, 2020 at 15:18
physics.stackexchange.com

9 votes

What exactly is the difference between entanglement and correlations?

quantum-mechanics quantum-information quantum-entanglement asked Jun 24, 2020 at 6:49
physics.stackexchange.com

8 votes

Show that the supremum of a collection of lower semicontinuous function is lower semicontinuous

real-analysis continuity semicontinuous-functions asked Jun 13, 2017 at 9:46
math.stackexchange.com

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Top Answers
157
Why do professors obfuscate their email addresses on their websites?
academia.stackexchange.com

42
Shouldn't some stars behave as black holes?
physics.stackexchange.com

39
What's the difference between average velocity and instantaneous velocity?
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22
What does Heisenberg's uncertainty principle tell about nature?
physics.stackexchange.com

18
How are physics theorems so accurate, relative to fixed measurement systems?
physics.stackexchange.com

12
In the Schrödinger equation, can I have a Hamiltonian without a kinetic term?
physics.stackexchange.com

11
How are arbitrary $2\times 2$ matrices decomposed in the Pauli basis?
quantumcomputing.stackexchange.com

8
How is it possible there are UV photos while our eyes cannot detect UV waves?
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7
Find the derivative at (1,2)
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6
Confusion about mixed states and pure states
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6
Difference between fermions and bosons in Statistical Mechanics
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6
Differentiation of a ket vector with respect to a spatial dimension
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6
Proof that entanglement "speed" cannot exceed the speed of light?
physics.stackexchange.com

6
What possible variants/permutations/derivatives are there of the Heisenberg uncertainty principle?
physics.stackexchange.com

6
A manifold that is not embedded? Manifold definition in general relativity by Robert Wald
physics.stackexchange.com

6
Experimental exactness of Schrödinger equation for more than 100 particles
physics.stackexchange.com

6
A basic question on circuits and matrix representation
quantumcomputing.stackexchange.com

6
What is the unitary operator realizing a given CPTP operator
quantumcomputing.stackexchange.com

5
Hermitian conjugate of momentum operator
physics.stackexchange.com

5
The postmark on letter from either KRISHNAGIRI or DHARMAPURI has only "RI" visible. What is the chance the letter came from KRISHNAGIRI?
math.stackexchange.com

5
Does it make sense to sum two Choi operators?
quantumcomputing.stackexchange.com