*(Fig.1) ↓ Pressure depends on molecular number and their velocity.*

All phenomena in our world *obey* some **common** physical principle. So if we find that common principle, we can predect **all** other phenomena using it.

For example, the air pressure is known to change depending on the molecular *number* and their *motions* (= temperature ).

After we found the basic common model using **real** molecules which are moving around "classically", it becomes possible to *predict* all other thermodynamics.

Unfortunately, the present quantum mechanics does **NOT** have this common basic principle available to every physical system !

*(Fig.2) Common real atomic model is necessary to predict other reactions.*

We already have the technology of measuring each **single** atomic *force* and moving each single atom using atomic force microscopy.

After measuring each basic atomic force, we need to determine some **common** basic atomic **model** using **real** electrons.

Because once we find and set those *basic* atomic models, we can *predict* all other atomic ( or molecular ) interactions combining them.

But *useless* quantum mechanics does **NOT** allow it !

*(Fig.3) Because it has NO exact solutions in multi-electron atoms.*

Now the **only** method available for atomic interaction is Schrödinger equation in quantum mechanics which has NO clear electrons.

The problem is this Schrödinger equation can **never** be the *common* basic atomic principle, because it cannot solve multi-electron atoms.

Instead, they just choose *fake* trial wave functions out of infinite choices to fit experimental results. These are NOT true solutions in Schrödinger equation.

Each time we deal with different molecular combinations, we have to **choose** new artificial fake wave functions to explain it.

So the present quantum mechanics **cannot** offer the basic atomic model *common* to all atoms and molecules, forever.

*(Fig.4) Quantum mechanical wavefunction has NO real electrons.*

Wave function in quantum mechanics does **NOT** include *real* "separated" electrons. Instead, it just shows vague electron clouds.

So in these *vague* quantum mechanical model, we *cannot* compute directly Coulomb force among atoms. Instead, we have to "solve" Schrödinger equation.

But as I said, Schrödinger equation **cannot** be solved except for one-electron hydrogen atom.

It means quantum mechanics has NO basic atomic model common to all atoms and molecules, and it **cannot** predict any physical phenomena.

We have NO other choices than to *give up* **useless** quantum mechanics and adopt realistic atomic model based on "common" physical principle.

*(Fig.5) They just choose "fake solution" from infinite choices ← useless !*

After detecting the slight force of a *single* atoms or molecule, we need to **interpret** those forces using some atomic model.

Unless we can explain each single atomic force, we cannot move forward to the next step of utilizing multi-atomic bahavior.

The problem is that there is the **only** useless quantum mechnaics (= Schrödinger equation ) as a tool to interpret these atomic data, now.

Quantum mechanics have NO exact solution in multi-electron atoms, so they just choose fake solution from **infinite** choices, meaning **no** power to predict anyhing.

In atomic force microspopy, they use densisty functional theory (= DFT ), which is a further approximation of quantum mechanics, so more incorrect and **useless**.

*(Fig.6) DFT is one of "false" approximations of Schrödinger equation.*

In atomic force microcopy, the **only** tool is *useless* density functional theory (= DFT ). **All** papers rely on this DFT ( this , this ).

Density functional theory (= DFT ) is one of approximate Schrödinger equations. DFT replaces electron-electron interaction by **fake** *artificial* potential.

In Schrödinger equation, they just choose fake approximate solutions as "trial wavefunction". In DFT, they have to choose "fake artificial *potential*", too.

There are NO restrictions in choosing these fake potentials. We can choose any forms of these potentials from **infinite** choices in DFT.

So DFT has **NO** ability to predict any atomic behavior. In spite of this, this DFT is the **only** tool for analysing atomic force microcsopy !

No matter how many times they catch slight atomic force, all they can use is useless density functional theory (= DFT, see this p.6 ).

All in these single molecule detections, useless density functional theory is the **only** method to **interpret** each atomic force ( see abstract of this and this ).

This is where out science stops. Physicists are **shackled** to old useless methods which **don't** admit "concrete *force*". It just gives us weird wavefunctions as a tool.

*(Fig.7) So DFT cannot predict any atomic behavior, useless.*

Density functional theory (= DFT ) forcedly changes muti-electron equation into one-electron approximation.

In **one**-electron DFT method, we need to *artificially* pick up "**fake**" forms of electrons' interaction *potential* called exchange correlation functional.

**Selecting** convenient functional for your purpose is all you have to do in DFT ( this p.9 ). There is **NO** universal functional describing any potential ( this p.2 ).

When you pick up one of functional ( ex. LDA ) from **infinite** choices and it **fails**, you can pick up *other* functionals as fake electrons' potential.

Selecting fake potential and fake solutions as you like means this DFT method has **NO** ability to predict any atomic behavior, so useless, too

2017/4/28 updated. Feel free to link to this site.