Yatendra Singh Jain

9 Questions 80 Answers 0 Followers

Questions related from Yatendra Singh Jain

Interested to read Microscopic theory of simple fluids ?

Ever since the discovery of Van der Waals theory of liquids, it has been the endeavour of the researchers in the field to discover the microscopic theory of simple fluids. I have recently...

26 November 2017 1,275 7 View

Is there any relation between the values of liquefaction temperature and the critical temperature of a gas ?

It is well known that a gas can be transfered in to liquid phase at its characteristic temperature (say TB) if and only if it is cooled below certain critical temperature (say Tc). The question is...

23 June 2016 6,486 16 View

What should be the lowest percentage of He-atoms that should occupy p=0 state to produce superfluidity ?

It has been a popular belief that super fluidity of He-II and of trapped dilute Bose gases arises due to macroscopically large fraction of particles in a single particle state of momentum p=0. ...

15 March 2015 1,517 9 View

How long before and how long after the impact of electro-magnetic field is observed if a photon crosses the point of observation at time T ?

Apparently, the electromagnetic field is assumed to be all around a photon. Possibly it is not correct. The field is localised within about $\lambda$ space around the position of a photon. I...

01 March 2015 8,904 19 View

Is the ball room dance of Cooper pairs an imaginary construct or a conclusion drawn from a derivation of BCS theory ?

How do electrons move in a resistance free current in a superconductor has been a question of great curiosity. However as reported in: http://www.aip.org/history/mod/superconductivity/03.html...

20 February 2014 425 8 View

Should we believe that macroscopically large numbers of bosons in a harmonic trap can really have zero momentum in their ground state?

First principle wave mechanical formulations reveal that a quantum particle in any potential trap has non-zero energy in its ground state. This implies that no atom of trapped dilute boson gas in...

04 February 2014 6,731 3 View

Is there any example of a metal or metallic alloy that becomes an insulator upon cooling ?

There are number of substances which are expected to exhibit metallic behaviour according to their electronic band structure. However, these are found to be insulators or they exhibit metal to...

18 December 2013 337 30 View

Why according to BCS theory, electrons in energy levels near Fermi level (within ±Δ) form Cooper pairs, other electrons of lower energy do not?

As per BCS theory, electrons occupying states close to Fermi level (within ±Δ with 2Δ being the energy gap) form Cooper pairs. What happens to those electrons which occupy states of lower...

29 October 2013 254 9 View

What is the chemical potential of liquid helium-4 (whether 13 K or 0 K)? Can any body explain ?

It may be noted that per atom energy of liquid helium-4 at absolute 0 is estimated to be around 13 K.

29 November 2012 513 3 View