Recent content by petr1243

I haven't tried the experiment yet, but I'm geared towards starting it next week. Just need to get all the facts straight, before stepping into the lab. 1310, and 1550 nm sounds right. I've been reading many papers that have been using color coding, by using numerous amounts of dispersive prisms...

A coherent fiber bundle is very useful in transmitting images. Let's say we have a gaussian beam from a laser as our source. Now the acceptance angle(2*alpha) is determined from the location of the beam waist, right? The light ray will then go down the fiber core with the use of a converging...

I'm actually working on a tridiagonal matrix in which the diagonal term is some formula in terms of integer n, and the super and sub diagonal terms are equivalent to one another(constant, independent of n). I would like to implement this subroutine into my program. I would prefer an explanation...

Are you referring to the explanation from indiana university? If it isn't, then could you please send me the link.

I'm not interested in the derivations of the well know ac and dc josephson equations. However, I am interested in trying to relate the two islands of a josephson junction with two BE condensates of Cooper pairs when the charging energy is sufficiently much larger than the Josephson coupling...

Could some one please explain the logic behind the subroutine tqli(d,e,z) found on pg.1228 of numerical recipes in fortran. For this subroutine, d and e are one dimensional arrays and z is an optional multi-dimensional array(only used if also seeking for eigenvectors of matrix). The 3 modules...

Repulsive interactions are an attribute of Cooper Pairs, which mean that Cooper Pairs don't behave like an ideal gas . Are these the only attributes that prevent Cooper pairs to behave like an "ideal" boson? How could we show that the two superconductors of a JJ behave just like two BEC's?

dN3/dt = PN1 - Γ32N3 dN2/dt = Γ32N3 - Γ21N2 dN1/dt = -PN1 + Γ21N2 ΣdNi/dt = 0, i=1,2,3. Where P:pumping rate and Γ:decay rate. Goal: To get steady state values for Ni, i=1,2,3 and this is done by setting dNi/dt = 0 , i=1,2,3. When we get each steady state value, we usually...

Yes you are absolutely correct. Originally there will be more atoms in the ground compared with the excited state. This will not produce "lasing". We will have a laser by using the process known as "optical pumping". Without this energy pump, population inversion will be nearly impossible, hence...

This schematic is nothing but a Josephson junction, taking into assumption that SrRuO_3 is a superconductor. SrTiO_3(Strontium Titanium Oxide) will be the dielectric(insulating barrier), so this insulating barrier is treated as the junction capacitance. Properties of this insulating barrier:Now...

I'm having trouble understanding the properties of the "coulomb staircase" using the average integer charge: <n> as a function of the gate charge. How would we go about getting this graph? http://www-drecam.cea.fr/drecam/spec/Pres/Quantro/Qsite/projects/qip.htm It will be the last graph...