Quantum computers: Meet my new computer. Different than the old computer…

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In theory, quantum computers can do anything that a classical computer can. In practice, however, the quantumness in a quantum computer makes it nearly impossible to efficiently run some of the most important classical algorithms.

The traditional grade-school method for multiplication requires n^2 steps, where n is the number of digits of the numbers you’re multiplying. For millennia, mathematicians believed there wasn’t a more efficient approach.

But in 1960 mathematician Anatoly Karatsuba found a faster way. His method involved splitting long numbers into shorter numbers. To multiply two eight-digit numbers, for example, you would first split each into two four-digit numbers, then split each of these into two-digit numbers. You then do some operations on all the two-digit numbers and reconstitute the results into a final product. For multiplication involving large numbers, the Karatsuba method takes far fewer steps than the grade-school method.

When a classical computer runs the Karatsuba method, it deletes information as it goes. For example, after it reconstitutes the two-digit numbers into four-digit numbers, it forgets the two-digit numbers. All it cares about is the four-digit numbers themselves. But quantum computers can’t shed (forget) information.

Quantum computers perform calculations by manipulating “qubits” which are entangled with one another. This entanglement is what gives quantum computers their massive power, but it is the same property that makes (made) it impossible for them to run some algorithms which classical computers can execute with ease. It was only until some years ago that Craig Gidney, a software engineer at Google AI Quantum in Santa Barbara, California, described a quantum version of the Karatsuba algorithm. (1)

Think. Forget. Move on. Think again…

Know everything.

And you will need to forget.

Forget so that you can learn.

So that you know it all.

The path to light, passes through alleys of darkness.

And trusting the light can only lead to darkness, when the Sun sets down.

You need the Moon.

For it is only there, that you can see your eyes reflected…

Upon the silvery calm lake…

Sun breathing fire.

Light reflected on the Moon…

Cold light reflected on water…

Light passing through your eyes.

In the dead of the night,

You realize that you knew the Sun.

Stand still enough…

And you will listen to the cosmos being born…

Going back in time… With no change…

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We cannot reverse the arrow of time any more than we can erase all our wrinkles or restore a shattered teacup to its original form.

Or can we?

An international team of scientists led by the U.S. Department of Energy’s (DOE) Argonne National Laboratory managed to return a computer briefly to the past.

To achieve the time reversal, the research team developed an algorithm for IBM’s public quantum computer that simulates the scattering of a particle. In classical physics, this might appear as a billiard ball struck by a cue, traveling in a line. But in the quantum world, one scattered particle takes on a fractured quality, spreading in multiple directions. To reverse its quantum evolution is like reversing the rings created when a stone is thrown into a pond.

In nature, restoring this particle back to its original state – in essence, putting the broken teacup back together – is impossible, since you would need a ​”supersystem” to manipulate the particle’s quantum waves at every point. The time required for this supersystem to properly manipulate the quantum waves would extend longer than that of the universe itself.

The team managed to overcome this complexity, at least in principle. Their algorithm simulated an electron scattering by a two-level quantum system,​ “impersonated” by a quantum computer qubit and its related evolution in time. The electron goes from a localized, or​ “seen,” state, to a scattered one. Then the algorithm throws the process in reverse, and the particle returns to its initial state – in other words, it moves back in time, if only by a tiny fraction of a second. (1)

Going back in time.

By returning to the original state.

Because time is defined by change.

But what does this mean?

This doesn’t mean they go back in time.

But that time wasn’t there in the first place…

The 2nd law of thermodynamics.

The arrow of time.

The fate of the universe.

Everything will be back to their original state at the end.

And the end will be the new beginning.

Going back in time.

Where time is nothing but a fleeting feeling.

Open your eyes.

Can you dream of how you started dreaming?

Life. Existence. Quantum mechanics.

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We’re a little closer to explaining life with quantum mechanics thanks to research carried out with an IBM supercomputer.

Encoding behaviours related to self-replication, mutation, interaction between individuals, and (inevitably) death, a quantum algorithm has been used to show that quantum computers can indeed mimic some of the patterns of biology in the real world. This is still an early proof-of-concept prototype, but it opens the door to diving further into the relationship between quantum mechanics and the origins of life.

The same principles governing quantum physics may even have had a role to play in forming our genetic code. (1)

Life is weird.

We are not sure what it is.

But we are sure it is something (good).

Death is weird.

We not sure what it is.

But we are sure it is something (bad).

But could both perceptions be wrong?

Look through the mirror of existence.

Life as a result of death.

Death as a result of life.

A cosmos balancing between existence and non-existence.

For Being is neither…

Demons. Computers. A world of chaos. Death by order.

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Physicists have employed a version of Maxwell’s demon to reduce entropy in a three-dimensional lattice of super-cooled, laser-trapped atoms – a process that could help speed progress toward creating quantum computers. (1)

A cosmos full of chaos.

We struggle into increasing order in the universe.

At the end we will succeed.

And the cosmos will die.

Look at the butterfly. It is not beautiful because it is orderly and neat. It is beautiful because it is a chaotic little creature looking for a mate before it dies. Look at the stars. They are not beautiful because they are tidy and neat. They are beautiful because they are raging with fire and heat. Look at you. You are not as orderly a creature as you might think.  Changing every minute. Full of different cells and even different organisms. Full of rage, love, forgiveness, hate, sins and emotions.

Accept yourself.

The path to heaven passes through chaos.

Don’t trust the demons.

Order is another synonym of Hell…

Quantum memories…

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Quantum cryptography today uses optical fiber over several hundred kilometers and is marked by its high degree of security: it is impossible to copy or intercept information without making it disappear.

However, the fact that it is impossible to copy the signal also prevents scientists from amplifying it to diffuse it over long distances, as is the case with the Wi-Fi network.

Since the signal cannot be copied or amplified without it disappearing, scientists are currently working on how to make quantum memories capable of repeating it by capturing the photons and synchronizing them, so they can be diffused further and further. All that remains is to find the right material for making these quantum memories. “The difficulty is finding a material capable of isolating the quantum information conveyed by the photons from environmental disturbances so that we can hold on to them for a second or so and synchronize them”.

Researchers at the University of Geneva (UNIGE), Switzerland, in partnership with CNRS, France, have discovered a new material in which an element, ytterbium, can store and protect the fragile quantum information even while operating at high frequencies. (1)

Conveying messages.

Message that will be lost.

Inside the whirling wind…

The great mountain is looking.

Listening to all the messages.

Passing through the forest trees.

It knows that it will be here tomorrow.

But it will not convey the message.

Because that was never the goal.

The message was not to be conveyed.

Only the silence was.

Before and after the message…

Can you listen to the wind?