What are the physical significance of Bogoliubov transformation?

It helps in the diagonalization of the many body interaction Hamiltonian (such as in BEC). However, I am interested in the physical significance of the coefficients of the operators in this...

31 December 2017 6,051 5 View

What is dipole-dipole interaction? What kind of interaction it is?

I am curious to know about dipole-dipole interaction and the origin of this interaction. how can i visualize this interaction in bulk?

10 November 2017 5,984 3 View

What is the difference between population transfer between two quantum states/system and the state transfer in quantum system?

04 May 2017 8,778 1 View

Can liquid be used to sense the forces/weak forces?

When I hit a water container, it shows ripples which is due to harmonic property of the water and are visible to eyes. But what about if amplitude is very weak and cant be seen by eyes such as...

01 February 2017 8,324 0 View

What is quantum hall effect and how can one observe it?

Please add references, if any. thanks

08 September 2016 1,203 0 View

What are the conditions for an harmonic oscillator(mesoscopic) to behave as classical or quantum oscillator?

The position of the oscillator fluctuates with a root mean square displacement amplitude del x= (Kb*T/m*w^2)^1/2, where m is mass of the oscillator and w is frequency. At high temp. oscillator...

11 December 2015 6,351 25 View

What is genetic problem? How it works?

The disorder in human body is related to mutation of genes. But how it works and on what factor does it depend?.

10 November 2015 4,248 2 View

What is your perspective about coincidences?

I have observed many times that I met with things or moments that I was thinking about(imaging) in my past. What do you think about coincidences concurring in our life? do they have any value in...

10 November 2015 965 1 View

What does it mean by entanglement of two atom with a single photon?

How can i visualize this phenomenon?...Please interpret in detail...

09 October 2015 2,552 4 View

Isn't it better to being a human than a arrogant educated person?

08 September 2015 542 3 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 are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 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

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

Statistics: include groups of respondents made by one person for analysis?

Good morning, I could not find literature about this so I am asking. I am organizing data for a questionnaire (N=100) that foresees some personal questions like level of education. For the aim...

25 February 2021 2,090 4 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View