Can someone explain how does one go from frequency domain noise to multipole domain ?

I want mathematical answers.

07 August 2019 8,087 2 View

What is the difference between Hubble sphere,particle horizon and event horizon ?

Please explain conceptually

31 December 2017 3,950 0 View

What determines the speed of sound in inflation models woth non canonical terms?

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11 December 2016 5,896 0 View

What is the physical meaning of anti commutation operators in quantum mechanics?

Physical meaning of commutation operators are understood.

05 June 2016 1,644 6 View

If kinetic energy is a scalar then why does it change under galilean transformation?

.

01 February 2015 2,381 0 View

What mathematical back ground is required to learn string theory

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11 December 2014 8,086 0 View

Does one have to be absolute genius like edward witten to shine in theoretical physics?

I dont think so there is something like genius or is it

10 November 2014 2,043 2 View

Why we dont talk about forces in quantum mechanics?

10 November 2014 2,926 1 View

Is the schrodinger equation a postulate of quantum mechanics or can it be derived?

I think it can be derived.

08 September 2014 2,425 22 View

How do i calculate iso curvature three point correlation function for non Gaussianity in Inflation models?

I want to about field correlation function and iso curvature correlation functions.Please give some references for detailed calculation

01 January 1970 7,826 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View