Top page ( quantum mechanics is wrong, and quantum computer is useless )

Shor's algorithm is useless forever, Not faster

*(Fig.1) How "fantasy" quantum computer spread ? *

Quantum computer is useless forever

David Deutsch first proposed quantum computer which could calculate many things at the same time using **parallel** worlds.

Because the present quantum mechanics is based on "superposition" where a single particle can be everywhere at the same time, until we observe it.

Of course, it's **impossible** to see these *parallel* worlds, so this quantum computer is impracticable, forever.

But under useless physics, they crave some imaginary target to collect **money**.

So, commercial top journal Nature (+ bbc ) started spreading this fantasy.

In US, commercial MIT college takes the lead in quantum computer and parallel worlds to collect money and justify their tuition.

Now, many corporations such as Google are deceived into **wasting** money in "pie-in-the-sky" quantum computer.

*(Fig.2) Ordinary computer calculates in order. *

In a conventional classical computer, we can compute **one** thing at the same time with a **single** machine.

When there are four things to calculate, classical computer does computing in order from 1 to 4.

*(Fig.3) ↓ This fantasy quantum computer is really practicable ? *

They say quantum computer can compute **all** possible results at the **same** time using **parallel** different worlds. See this.

Quantum mechanics claims each computer bit can be in **two** different states ( 0 and 1 ) at the **same** time, which is called superposition.

So they claim one single operation is enough to perform all different possible computations instantly in quantum computer.

Unfortunately, this idea is a too optimistic **delusion**. This is the reason quantum computer is impracticable despite longtime researches..

*(Fig.4) Quantum computer depends on parallel worlds. *

The basic idea of quantum computer is to utilize parallel worlds to compute **different** values at the **same** time.

So if we can realize ultrafast quantum computer using parallel computing someday, it will mean the proof of unrealistic parallel worlds.

Unfortunately, the concept of parallel world is just fiction, so quantum computer is **impracticable**, forever.

*(Fig.5) Quantum superposition = Schrödinger's cat ? *

Quantum mechanics relies on fantasy "superposition" where each object can be in **two** different states at the same time ?

It's called "Schrodinger's cat, where a *single* cat is **both** dead and alive **until** someone opnes the box to find out.

As you feel, it's completely impossible for each cat to be both dead **and** alive at the **same** time. So quantum mechanics **lacks** reality.

The point is we **cannot** see parallel different worlds directly, because it collapses into a single world, the moment we observe it.

So superposition = parallel worlds, the heart of quantum mechanics has **No** evidence, it's **too good** to be true.

*(Fig.6) But quantum mechanics mistakes it for "parallel worlds" ! *

Though parallel worlds clearly **lack** reality, why do we see
its news and paper very often ?

The point is the present physics **mis**interpret some "**classical** phenomena" as "parallel worlds". Of course, this is an "*intentional*" mistake.

In Fig.6, a single atom is **alternating** between ground state and excited state by laser light. This is a realistic (= classical ) phenomenon.

But they intentionally **mistake** "this alternating" for "superposition" where two different ground and excited states **coexit** at the same time.

And when we try to observe the atom, it "collapses" to **one** of ground or excited states. So we **cannot** directly confirm parallel worlds.

It's too good to be true. See this Fig.6 and this.

*(Fig.7) D-Wave proved to be NOT-faster. *

D-Wave is a hot topic in the present quantum computer.

Recently, D-Wave machine proved to be NOT faster than classic PC.

The important point is that D-Wave is NOT a quantum computer, but a *classical* machine. So it can **neither** be faster nor useful.

Of course, if they changed the definition of "quantum", it may be called (fake) "quantum computer". But doubtful.

*(Fig.8) Moving electrons gradually settle in ground state. *

It is often said that D-Wave machine is NOT a real quantum computer.

Because D-Wave machine does **NOT** use parallel computing.

D-Wave just finds the **lowest**-energy ground state depending on initial setting of parameters through annealing.

Though D-Wave claims this is due to quantum tunnel, its effect is too small to confirm.

We can say it is due to other thermal noises or nonspecific oscillation.

*(Fig.9) The difference between D-Wave and quantum computer. *

In D-Wave machine, each electron gradually settles in its most stable (= lowest-energy ) state, which pattern can be freely adjustable.

So this D-Wave machine is completely **different** from "real" quantum computer, which perform parallel computing in parallel worlds.

D-Wave does **NOT** perform any computing. It just finds the most stable ground state. "Simultaneous computation" does **not** happen in D-Wave.

So it may be used only in some special optimization such as "traveling salesman problem" ( in *classical* way ).

D-Wave has **nothing** to do with "parallel-world computing", so it can **never** be ultra-fast quantum computer.

*(Fig.10) Only factorization 15 = 3 × 5 can be done ? *

It is said that quantum computer can find prime factors much faster than classical computer. But it is a big **lie**.

They could only factor 15 into 3 × 5, so far.

Furthermore, it causes 50 % error ! So completely **useless**.

There is **NO** proof that a quantum computer factored some numbers faster than classical computer.

*(Fig.11) When classical computer calculates four times, *

Factorization into prime numbers can be performed using Shor's algorithm. Here we factor **15** into **3 × 5** using Shor's algorithm.

First, we choose an arbitrary number ( here, we choose "**2**" ).

Seond, we **devide** 2 (= 2^{1} ) by 15, and its **remainder** is 2.

In the same way, after we get 2 squared (= 2^{2} ), 2 cubed (= 2^{3} ) and 2 to the power of **four** (= 2^{4} ), we calculate each **remainder** by dividing them by 15.

Continue until the remainder becomes "**1**".

*(Fig.12) Finally, we get 15 = 3 × 5.*

When **2 ^{4}** (= 16 ) is divided by 15, its remainder becomes

Then we calculate 2

These values are equal to **3** and **5**.

So we can factor 15 into 3 × 5.

*(Fig.13) It can get four different remainders at the same time ? *

Classical computer has to calculate **four** times to get four **different** remainders.

Surprisingly, they argue that quantum computer can calculate these four different remainders at the **same** time using *parallel* worlds !

This is the reason why physicists claim quantum computer can calculate many different values much **faster** than classical computer.

But of course, this computing using paralell worlds is just "**fantasy**".

*(Fig.14) Each bit is white (= 0 ) or black (= 1 ) *

There are four bits in classical computer in Fig.14.

Each bit can be white (= 0 ) or black (= 1 ).

So there are 2^{4} different patterns in four bits.

Different patterns **cannot** happen at the *same* time in classical PC.

*(Fig.15) Quantum computer 4 bits = 2 ^{4} parallel worlds !? *

How about unrealistic quantum computer ?

Quantum computer bits can be **all** possible states at the **same** time.

So when there are four quantum bits, **all** 2^{4} = 16 different patterns are allowed to **coexist** at the **same** time in quantum computer !

It means there are 2^{4} **parallel** worlds in these quantum bits at the same time.

*(Fig.16) Different values coexist in each register ? *

There is a pair of register 1 and 2. Different from classical computer, quantum computer calculates different values at the **same** time.

When executing Shor's algorism, a single register 1 contains 16 different patterns, and a register 2 contains each different results (= remainder ).

They claim **all** these different patterns happen at the **same** time in quantum computer !

*(Fig.17) ↓ Parallel worlds in quantum computer registers. *

They argue there are parallel different **worlds** in each register 1 and 2.

2^{1} divided by 15 gives the remainder "2".

So parallel world A (= 2^{1} ) in register 1 is **entangled** with parallel world D ( = 2 ) in register 2.

Of course, we **cannot** observe different parallel worlds, so these ideas are just imaginary *delusions*.

*(Fig.18) When remainder becomes "1", its period is "4"*

In Shor's algorithm, we pick up the value, when the remainder is **1**.

In quantum computer, we observe the case when the register 2 becomes "1".

In this case (= remainder is 1 ), the values of register 1 is **either** 4, 8 or 12 ..
After reading register 1 repeatedly, we know its period is "**4**".

See the method ( p.1 ).

*(Fig.19) *

Using the value "4" of the period in register 1, we can guess the prime factors 3 and 5.

If parallel worlds are real, this factorization can be perfomed much faster than classical computer.

But unfortunately, there are **NO** evidence for parallel worlds, so far.

*(Fig.20) Quantum computer in Science didn't use Shor's algorithm. *

A recent Science paper claims they used Shor's algorithm in quantum computer.

But in fact, this Science paper has **nothing** to do with quantum computer ( Shor's algorithm ). See the critic who **disproved** this Science paper.

In the original paper (p.2), they adopted "semi**classical** method" (← **Not** quantum ! ) and *recycled* each bit instead of parallel computing.

*(Fig.21) Reset and recycle a single bit instead of parallel computing. *

In this Science paper, register 1 is only a single bit, which **cannot** contain parallel different worlds.

So each time they compute different remainder, they **reset** and *recycle* each bit before computing the next remainder.

This is the reason they call it "semiclassical" method.
So even in the simplest factorization 15 = 3 × 5, quantum computer is **impossible**.

It means they couldn't generate parallel worlds for parallel computing even in factoring 15 = 3 × 5.

So the world "scalable" by MIT physicists is completely **misleading**.

This is similar to the previous
Nature photonics.

*(Fig.22) Alternate between upper and lower states = Parallel worlds ? *

We **cannot** observe a grotesque cat which can be dead and alive at the same time. So parallel worlds are just fiction.

In spite of this, physicists try to create parallel worlds = superposition of two different states by force !

Suppose an atom is alternating between upper and lower energy states by laser light, which means just "**classical** oscillation".

But they intentionally **mistake** this "classical oscillation" for "parallel worlds" where the upper and lower states **coexist** at the same time !

This logic is **ridiculous**.

*(Fig.23) Alternating between two states = Two Parallel worlds !? *

Here we explain this Nature physics paper, which claims simple Shor's algorithm is performed.

They often use the concepts such as quantum superposition (= parallel worlds ) and entanglement.

Three computer bits are **alternating** between two different states by laser light in Fig.23. This is just "classical oscillation".

But they intentionally *misinterpret* this classical oscillating as "**parallel** worlds", where each bit is entangled like white-white or black-black.

See this paper Fig.2.

*(Fig.24) Choosing "4" as an arbitrary number *

Again we factor 15 into 3 × 5 using Shor's algorithm.

Here we pick up "4" as an arbitrary number.

When the remainder becomes "**1**", its period is "2".

*(Fig.25) *

As a result, we can get prime factors 3 and 5 by starting from "4".

*(Fig.26) ↓ Only two different patterns are needed. = classical. *

When the period is 2, it's the **simplest** case.

We need to prepare only two different states in registers.

Of course, it means they did **NOT** compute factorization, because they just use the "already-**known**" answer starting from "4".

So this paper has **nothing** to do with quantum computer (= Shor's algorithm, this p.3 ). They just use "*classical* oscillation" of bits' state.

In Fig.26, when the resister is "three whites", the remainder is 4, and when three blacks", the remainder is "1". They just artificially defined it.

After all, these experiments proved that creating quantum superposition for parallel computing is **impossible** even in the simplest factorization !

*(Fig.27) Schrodinger's cat cannot be dead and alive at the same time ! *

The conclusion is parallel worlds are *fiction*, Schrodinger cat **cannot** be dead and alive at the same time.

It means quantum computer based on **parallel** computing is just a **scam** to **defraud** people and corporations of their *money*.

This miserable situation is what the present physics is.

All students in the world are **deceived** into destroying their careers.

2016/3/11 updated. Feel free to link to this site.