User FaDA

5 votes

3 answers

2k views

Can the kinetic energy be a function of the position vector?

classical-mechanics energy

asked Jan 22, 2016 at 19:53

4 votes

2 answers

362 views

Does the convergence of van Hove sequence equivalent to thermodynamic limit?

statistical-mechanics mathematical-physics

asked Dec 31, 2019 at 9:52

4 votes

1 answer

333 views

Is there a spontaneous symmetry breaking in finite-size Ising model with + boundary condition?

statistical-mechanics mathematical-physics boundary-conditions ising-model

asked Jan 30, 2020 at 12:54

4 votes

0 answers

120 views

In renormalization group theory, why fixed point gives self-similar probability distribution

statistical-mechanics field-theory renormalization

asked Apr 17, 2020 at 15:40

2 votes

1 answer

78 views

Why is $\langle{\dot A}A^* \rangle=0$ for dynamical variable $A$?

statistical-mechanics quantum-statistics

asked Apr 25, 2019 at 11:12

2 votes

1 answer

100 views

Qualitative relationship between a function f(x) and its fourier components

waves mathematical-physics

asked Oct 8, 2016 at 1:33

2 votes

1 answer

1k views

Bloch theorem and Bloch states

quantum-mechanics condensed-matter solid-state-physics wavefunction crystals

asked Mar 20, 2017 at 10:54

2 votes

2 answers

1k views

Is Bloch theorem suitable for correlated electrons?

solid-state-physics

asked May 14, 2017 at 5:44

2 votes

1 answer

223 views

Question about the autocorrelation function of the fluctuating force in the Langevin model for Brownian motion

statistical-mechanics brownian-motion

asked Dec 7, 2018 at 13:34

2 votes

1 answer

480 views

Does the postulate of equal a priori probability apply only to equilibrium states or to all states satisfying the constraints?

thermodynamics statistical-mechanics

asked Aug 21, 2019 at 13:15

1 vote

1 answer

85 views

Definition of linear and non-linear dynamic susceptibility

thermodynamics quantum-field-theory statistical-mechanics critical-phenomena

asked Nov 14, 2020 at 16:01

1 vote

2 answers

295 views

Question about the wave function of a travelling wave

newtonian-mechanics waves

asked Jan 4, 2016 at 6:42

1 vote

1 answer

155 views

Question about ergodicity and the evolution of the probability distribution under Liouville's theorem

statistical-mechanics hamiltonian-formalism phase-space ergodicity

asked Nov 5, 2018 at 13:39

1 vote

2 answers

291 views

why drift velocity proportional to driving force

newtonian-mechanics diffusion

asked Dec 20, 2016 at 9:30

1 vote

1 answer

213 views

Question about using Liouville's theorem to calculate time evolution of ensemble average

statistical-mechanics hamiltonian-formalism differentiation phase-space volume

asked Aug 16, 2019 at 14:35

1 vote

0 answers

70 views

Question about the Markovian property of the velocity of a Brownian particle following Langevin equation

statistical-mechanics non-equilibrium brownian-motion stochastic-processes

asked Feb 27, 2019 at 11:20

1 vote

1 answer

74 views

How to prove $e^{it\hat X}=e^{it\hat Y}+\int_0^te^{i(t-\tau)\hat X}i(\hat X-\hat Y)e^{i\tau\hat Y}d\tau$ where $\hat X$ and $\hat Y$ are operators?

quantum-mechanics homework-and-exercises operators

asked Mar 21, 2019 at 15:22

0 votes

0 answers

83 views

Critical exponent $\nu$ of 3d Ising model

homework-and-exercises thermodynamics statistical-mechanics ising-model critical-phenomena

asked Oct 10, 2020 at 1:44

0 votes

1 answer

773 views

Question about the periodic potential in a crystal

electromagnetism solid-state-physics

asked Mar 13, 2017 at 10:27

0 votes

2 answers

247 views

Two ways to define wave function in Heisenberg picture

quantum-mechanics hilbert-space wavefunction hamiltonian time-evolution

asked Jan 24, 2019 at 13:28

0 votes

0 answers

17 views

Question about the recursion relation for the 1d random walk and Pascal's rule

statistical-mechanics stochastic-processes

asked Jul 17 at 15:18

0 votes

1 answer

100 views

Is ${e^{ikx}} \to {x^2}$ when $k \to 0$

statistical-mechanics mathematics

asked Oct 4, 2019 at 4:27

0 votes

0 answers

27 views

Can ${e^{ikx}}$ and the heaviside step funtion have similar physics content about the distribution of $x$?

statistical-mechanics mathematics

asked Oct 4, 2019 at 14:56

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23 Questions

Can the kinetic energy be a function of the position vector?

Does the convergence of van Hove sequence equivalent to thermodynamic limit?

Is there a spontaneous symmetry breaking in finite-size Ising model with + boundary condition?

In renormalization group theory, why fixed point gives self-similar probability distribution

Why is $\langle{\dot A}A^* \rangle=0$ for dynamical variable $A$?

Qualitative relationship between a function f(x) and its fourier components

Bloch theorem and Bloch states

Is Bloch theorem suitable for correlated electrons?

Question about the autocorrelation function of the fluctuating force in the Langevin model for Brownian motion

Does the postulate of equal a priori probability apply only to equilibrium states or to all states satisfying the constraints?

Definition of linear and non-linear dynamic susceptibility

Question about the wave function of a travelling wave

Question about ergodicity and the evolution of the probability distribution under Liouville's theorem

why drift velocity proportional to driving force

Question about using Liouville's theorem to calculate time evolution of ensemble average

Question about the Markovian property of the velocity of a Brownian particle following Langevin equation

How to prove $e^{it\hat X}=e^{it\hat Y}+\int_0^te^{i(t-\tau)\hat X}i(\hat X-\hat Y)e^{i\tau\hat Y}d\tau$ where $\hat X$ and $\hat Y$ are operators?

Critical exponent $\nu$ of 3d Ising model

Question about the periodic potential in a crystal

Two ways to define wave function in Heisenberg picture

Question about the recursion relation for the 1d random walk and Pascal's rule

Is ${e^{ikx}} \to {x^2}$ when $k \to 0$

Can ${e^{ikx}}$ and the heaviside step funtion have similar physics content about the distribution of $x$?