Seeing that Lü Yongchang did not intend to interrupt him, Academician Tang Wenshan continued.

"You are probably already familiar with the current quantum communication technology."

"It does not contain the so-called entanglement at a distance effect."

"It simply uses quantum entanglement distribution and teleportation to strictly encrypt the information."

"Currently, we do not have a theory that can use the quantum entanglement effect at a distance to transmit messages."

(P.S. In reality, the quantum entanglement effect cannot be used to achieve long-distance communication; the speed of information transmission is still limited by the speed of light.)

Lü Yongchang nodded.

He was naturally aware of this knowledge.

only……

"Academician Tang, in my opinion, the key difficulty currently limiting quantum communication technology is simply that we cannot precisely control a single photon."

Tang Wenshan fell silent.

"That's not wrong."

Tang Wenshan said with some hesitation, "If we can precisely manipulate a single photon, then we can naturally achieve long-distance communication simply by carrying another entangled photon."

Lü Yongchang shrugged: "Isn't that good enough?"

"Our task now is simple."

"To achieve precise manipulation of individual photons."

...

Three months later.

Inside the main laboratory.

A huge, sophisticated instrument sits in the very center of the laboratory.

This is the result of everyone's research over the past three months.

A single-photon control device.

Lu Yongchang and Tang Wenshan stood nervously in front of the control device, exchanging a silent glance.

"Mr. Tang, let's begin the experiment."

Lu Yongchang took a deep breath and said in a deep voice.

This is the first step towards realizing quantum long-distance communication.

Only by achieving perfect control over individual photons can they transmit information using the quantum entanglement effect at a distance.

Upon hearing the order given by Lü Yongchang, a complex expression appeared in Old Tang's eyes.

Excitement, trepidation, and anticipation.

He slowly pressed a button in front of him.

The machine has started up.

The indicator light changed rapidly.

The instant the indicator light turned green, a photon was emitted from the single-photon emitting instrument on the left side of the control device!

Photons travel at a speed of 300,000 kilometers per second in the tube.

In just a moment, the single photon passed through the narrow tube and entered a sealed black box on the right.

The black box contains a large number of polarizers, half-wave plates, and interferometers.

The inner walls of the black box were fitted with highly reflective mirrors.

The mirror's function is simple: to prevent photons from escaping, or rather, to prevent them from being absorbed by this sealed black box.

The other devices are designed to achieve precise control over photons.

"A single photon has been detected!"

Upon seeing the data displayed on the screen in front of him, Lü Yongchang's eyes immediately lit up with excitement.

"Zero, try to see if you can precisely control the state of this photon!"

Photons travel too fast and their states are too complex, so the only way to control them is with the help of Zero, a strong artificial intelligence.

"Yes, Professor."

The sound of zeroing was accompanied by the soft hum of the machine running.

Looking at the complex data flashing on the screen, Lü Yongchang clenched his fist slightly.

"Professor, it's a success."

Zero's calm voice echoed in the main laboratory: "The instrument has successfully altered the motion and spin state of this photon."

After a brief silence, loud applause erupted in the main laboratory!

"Professor Lü! We succeeded!"

Tang Wenshan strode over to Lü Yongchang, grabbed Lü Yongchang's hands tightly, and his excitement seemed to overflow!

"Yes!" Lü Yongchang breathed a sigh of relief. "We succeeded!"

Although the system provided assurance, it wasn't until this moment that the huge weight that had been hanging over his heart finally fell to the ground.

"Professor Tang, next, we should prepare to study a pair of entangled photons."

Of course, before that, Lü Yongchang gave a short break to the group of researchers.

After all, not everyone can withstand three consecutive months of high-intensity scientific research.

...

Back in his office, Lü Yongchang sat in his chair and closed his eyes again.

From the moment the experiment succeeded, a bold idea popped into his mind.

Now that they have mastered precise control over individual photons, can the previously abandoned quantum computers be put to use again?

After all, the reason for abandoning optical quantum computers in the first place was that they could not be programmed and could only solve specific problems.

The fundamental reason why it is impossible to program is that humans cannot precisely control photons!

After considering this, an even bolder idea vaguely arose in Lü Yongchang's mind.

With excitement, his consciousness entered the technology tree space.

Just as expected!

The technology tree has quietly changed.

The brightness of the cursor in quantum long-distance communication technology has reached 50%!

But this is not the biggest change.

The biggest change is that a bright white solid line extends next to the cursor.

Photon control: Achieving precise manipulation of individual photons!

The cursor is bright.

In Lü Yongchang's opinion, this cursor seemed to be a few points brighter than the others!

When Lü Yongchang focused his attention on the photon control cursor, a faint dotted line extended from it.

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