Protein qubit, quantum sensor are useless, explained by classical orbits.

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Quantum computer is useless.

The recent overhyped research on quantum protein qubit magnetic sensors used only classical electrons' orbits with No quantum mechanics nor quantum computer nor spin.

(Fig.1)  Quantum mechanical Schrödinger equation is useless, unsolvable, cannot predict any energies.

A fluorescent protein's two energy levels changed by applied magnetic field were treated as a fictional spin qubit (= two energy levels 0 and 1 could unrealistically exist at the same time by unseen quantum superposition or parallel worlds ) or a (useless) magnetic sensor, which can be explained by a classical orbit.

The recent overhyped fake news claimed a jellyfish fluorescent protein called EYFP could become a (fictional) quantum computer's qubit or quantum magnetic biosensors someday.

↑ Actually, this hyped research just changed a few energy-level states (= Tx-Tz ) of a fluorescent protein by microwave pulse whose resonant frequency (= equal to energy difference between two energy levels ) was slightly changed by applied magnetic field B.

No quantum mechanics nor quantum computer nor electron spin was used in this seeming protein-spin-qubit sensor research, contrary to the above fake news.

No quantum computer in classical magnetic sensor.

A molecular electrons' classical orbits (= Not spins ) interacting with the applied magnetic field changed their energy levels, which were wrongly treated as quantum megnetic spin sensors or fictional quantum computer's bits.

↑ They just treated these protein's energy levels related to the magnetic moment of electron's orbit (= Not of the unreal unseen electron's spin ), whose energy levels were slightly changed by the applied magnetic field, as a (fictional) spin qubit or quantum (= just classical orbital ) magnetic biosensor, with No quantum computers (= this other news mentioned No quantum computers ) nor practical quantum sensors here.

A protein's two energy levels of classical electron's orbits (= Not spin ) affected by applied magnetic field were treated as quantum spin magnetic sensor or a fictional quantum computer's bit (= qubit ).

This hyped news (2025) says ↓

1st-paragraph says  -- Fictional quantum computer
"Scientists have turned a fluorescent protein into a working quantum bit, a result that could (= just speculation ) reshape both quantum computing (= false, this research is irrelevant to quantum computing,  ← this-research's p.1-abstract mentioned No quantum computers ) and quantum biology"

2nd-paragraph says  -- Fictional spin qubit, sensor
"yellow fluorescent protein (EYFP = a protein obtained from natural jellyfish ) can function as an optically addressable (fictional) spin qubit (= a spin qubit means just two energy states of atoms irrelevant to quantum computers here ), capable of being initialized, manipulated with microwaves and read out with light... quantum sensors."

6th-paragarph says  -- Short-lived unstable qubit
"EYFP has a metastable triplet state whose spin properties can be controlled... researchers to tap into the electron’s magnetic spin (= electron spin is illusion, whose magnetic moment can be explained by an electron's orbit ) and treat it as a qubit. By applying laser pulses, the scientists achieved triggered readout.. at cryogenic temperatures, according to the study. Microwave fields enabled coherent manipulation,.. about 16 microseconds (= just 16 microsecond, too short lifespan, impractical )"

12th-paragraph says  -- Jus applied microwave
"The team used microwaves to flip the protein's (fictional) spins (= just two energy levels related to electron's orbit )"

Still work to do says  -- Still impractical
"the platform isn't quite ready for prime time as it lags behind established solid-state sensors such as nitrogen-vacancy centers in diamond."

"Photobleaching of fluorescent proteins also remains a major challenge, limiting their stability under repeated excitation"

This research treated a protein's two energy levels changed by microwave pulse as a (fictional) quantum bit or qubit's 0 and 1 states with No quantum computers.

↑ This research Nature paper ( this-2nd-paragraph-link ), this ↓

p.1-abstract says  -- No quantum computer
Nothing about quantum computers, contrary to the above fake news.

p.2-Fig.1 shows  -- Energy levels = spin qubit ?
This research just manipulated several transient energy-level states (= Fig.1b, Tx, Ty, Tz ) of a fluorescent EYFP protein by microwave pulse (= Fig.1d, which was detected by PL emitted light's intensity ) with No quantum computing nor electron spin.

p.3-left-2nd-paragraph says  -- Energy levels change
"Qubit coherence Driving the EYFP molecules with a fixed frequency that is resonant with the Tx–Tz transition results in coherent Rabi oscillations between the (fictional) spin sublevels ( Fig.3a)"  ← Just a molecule oscillated between two energy levels with No quantum computation ↓

A fluorescent protein transiently oscillated between its two energy levels (= spin is unseen ) by microwave pulse, which was wrongly treated as a qubit where two energy levels existed simultaneously by unseen quantum superposition or parallel worlds.

↑ This research on the hyped protein qubit just oscillated or changed a fluorescent protein between two energy levels 0 and 1 (= called coherent Rabi oscillation ) of Tx-Tz for a short time by microwave pulse ( this-Fig.3a,  this-Fig.1b,d,  this-Fig.1 ) with No quantum computation nor seeing the electron spin.

↑ This oscillation or transition between two energy levels by microawve pulse was unreasonably treated as a quantum bit or qubit where these 2 energy states might exist simultaneously by (unseen) quantum superposition (= coherence,   this-5~8th-paragraphs ) or unreal parallel worlds (= Not observed, so the quantum superposition or a qubit has No evidence ).

A protein's energy levels whose classical electrons' orbits influenced by the applied magnetic field were wrongly treated as a (fictional) spin magnetic sensor, which is impractical.

This same paper on the protein qubit ↓

p.3-Fig.2b shows  -- Energy levels = sensor ?
The energy difference (= expressed as frequency ) between two energy levels of Tx-Tz (or Ty-Tz ) was slightly changed by the applied magnetic field B (= due to interaction between the applied magnetic field and the magnetic moment called Bohr magneton of the electron's orbit in those energy levels, Not spin,  this-p.2 ), which was treated as useless quantum ( spin-qubit ) magnetic sensors.

p.3-right-2nd-paragraph says  -- Magnetic sensor = classical orbits
"We demonstrate the potential (= still useless ) of our qubit (= just two energy levels by classical orbits ) as a room-temperature DC (static) magnetic-field sensor... Detecting subtle shifts in the ODMR (= optically detected magnetic resonance ) spectrum by measuring at two frequency points, one above and one below the Tx–Tz resonance,.. a linear function of a small external magnetic field"

Quantum mechanics cannot solve its Schrödinger equation nor predict any multi-electron atomic energies, so useless.

Quantum mechanics cannot solve its Schrödinger equations nor predict any multi-electron atomic energies.

Useless quantum mechanical approximations

For the unsolvable Schrödinger equations, quantum mechanical approximates such as variational, Hartree-Fock methods, CI have to choose fake trial wavefunctions out of infinite choices, which is impractical, too time-consuming, cannot predict anything.

For the unsolvable Schrödinger equations, physicists rely on quantum mechanical approximations called variational methods such as Hartree-Fock and configuration interaction (= CI ), which are impractical, proven wrong, too time-consuming.

Because all these impractical quantum mechanical approximate methods have to choose fake trial wavefunctions (= expressed as unphysical antisymmetric wavefunction or Slater determinants ) giving the lowest energy out of infinite candidates, parameters, which will take infinite time ( this-p.14-last,  this-p.2-introduction,  this-p.9-last ), hence can never find true answers without cheating.

This-1.4 says  -- Useless Schrodinger equation
"This wave function must satisfy the Schrödinger equation, which is the fundamental equation of quantum mechanics.. However, this approach faces a severe limitation: it becomes impossibly complicated for systems with more than a few electrons. Even with modern supercomputers, exactly solving the Schrödinger equation for a molecule as simple as ethanol is beyond our capabilities."

Due to impractical Schrödinger equation, quantum mechanics has to treat the whole molecules as one fake electron DFT approximate model with artificially-chosen fake exchange-correlation potential energy functional, which cannot predict anything.

Quantum mechanics gave up its impractical Schrödinger equation, and tries to express any molecules as fictional quasiparticles or one fake electron model called density functional theory (= DFT or Kohn-Sham theory ).

↑ This most popular quantum mechanical approximation DFT has to artificially choose fake exchange-correlation potential energy functionals , which can Not predict anything ( this-3rd-paragraph,   this-p.7,   this-p.3 ), so useless and still too time-consuming.

This-p.1-left-1st-paragraph says  -- Unreal DFT energy
"A central component of DFT is the exchange-correlation (XC) component of total energy, which encapsulates the complex many-body interactions among electrons. The exact form of the XC functional is unknown, and developing accurate approximations for it is essential because it determines the overall accuracy of DFT calculations."

Due to the impractical Schrödinger equation that cannot predict anything, the fake-one-electron DFT approximation is often used in many researches, which cannot predict anything including the above protein qubit sensors due to artificially-chosen fake exchange energy functionals.

Due to the impractical Schrödinger equations that cannot predict anything, one-fake-electron DFT approximation with artificially-chosen fake exchange-correlation energy functionals, which also cannot predict anything, are often used also in the above hyped protein qubit sensor research.

This protein qubit research's p.9-left-2nd-paragraph says  -- Unreal DFT
"TDDFT calculations... Both CAM-B3LYP and ωB97X-D3 (= artificially-chosen DFT's empirical exchange energy dispersion functional with No quantum mechanical prediction this-p.7-right-last ) predict an energy gap of about 3.02 eV between the S1 and S0 states. The results overestimate (= disagree with ) the experimental value"

↑ Even this mainstream quantum mechanical approximate DFT method with the artificially-chosen fake exchange energy could Not give right values in this (useless) protein qubit sensors.

So quantum mechanics is completely useless in molecules, proteins, hyped quantum sensors.

It is far better to use experimental values.

It is far better to use experimental values from the beginning than to waste too much time in the meaningless time-consuming quantum mechanical calculations that cannot predict anything.

As a result, it is far better to use experimental values from the beginning than to waste too much time in the meaningless impractical quantum mechanical calculations that cannot predict anything.

↑ Actually, as shown in quantum mechanical mainstream approximation DFT, even the quantum mechanical ab-initio theory relies on some empirical exchange energy fitted to experiments Not predicted by the (useless) quantum mechanics ( this-p.23-last ).

Unreal quantum mechanical shapeless atoms

The unreal quantum mechanical shapeless atomic model expressed by its unphysical antisymmetric wavefunctions and one-fake-electron DFT model hampers today's nanotechnology developing useful multi-probe atomic force microscopes claryfying real atomic mechanisms.

We should use the experimental values such as each atomic shape and properties that can be measured by (multi-probe) atomic force microscopes from the beginning instead of wasting too much time in the meaningless time-consuming quantum mechanical calculations that cannot predict anything.

But the unreal quantum mechanical shapeless atomic model expressed as the unphysical antisymmetric wavefunctions and one-fake-electron DFT model hampers developing useful multi-probe atomic force microscopes clarifying atomic structures.

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