How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

How to predict the reaction pathway for electro organic synthesis?

Can anyone recommend some any software/models available that can predict substance reactivities and the reaction yield under a specific set of reaction conditions process and proposing pathways to...

17 February 2021 2,383 3 View

How complex systems physics/statistical mechanics would be helpful for particle physics & Networking?

Recently, I've been selected for an ICTP program named Physics of Complex Systems. But, I have a keen interest in Particle Physics & Quantum networks. As statistical mechanics involved in...

11 February 2021 699 3 View

Reason for "reading bands namelist error" in band structure calculation in quantum espresso?

At first, I did the scf run then nscf run followed by another run with calculation set to "bands'. And finally, using command bands.x < example.in > example.out to post-process the data, I...

10 February 2021 7,970 2 View

Is there a way to use waveguide ports for circular antenna design in CST?

Hi, whenever i use circular array i get this error "Waveguide ports must be aligned with Cartesian coordinate planes for the transient solver" Does anyone use circular array with waveguide ports?...

09 February 2021 3,609 8 View

Applications of General Multiple Sums?

Does anyone know of applications of multiple sums of a sequence? I know of the Multiple Zeta values (which is a multiple sum of 1/N^s). This has multiple applications in quantum physics, QED,...

08 February 2021 8,047 12 View

Design parameters of L1 frequency Helix antenna?

Could I please get the guidance on Helix antenna operated from 1.5 - 1.8 GHz. I am designing in hfss and not able to cover 1.5 GHz. Could I get papers or suggestions on numbers I use to cover this...

02 February 2021 622 7 View

VSWR is shooting to 2.1 or even 2.3 in UHF dipole antenna, why?

So, I have a design, two dipoles working at UHF and VHF. We fed using a diplexer. I am having difficulties with the testing using network analyzer. VHF passes but UHF, specially at 400 MHZ, the...

26 January 2021 8,743 8 View