YE: Not likely. Because such technology would risk falling into your hands.
INTERROGATOR: One last question, and also the most important: Until now, has Trisolaris sent only radio waves to the Earth?
YE: Almost true.
INTERROGATOR: Almost?
YE: The current Trisolaran civilization is capable of space travel at one-tenth the speed of light. This technology leap occurred a few decades ago in Earth years. Before that point, their maximum speed had hovered around one-thousandth the speed of light. The tiny probes that they sent to the Earth have not even completed one-hundredth of the journey between there and here.
INTERROGATOR: Then I have a question. If the Trisolaran Fleet that had been launched is capable of flight at one-tenth the speed of light, it should take only forty years to reach the solar system. So why do you say that it would take more than four hundred years?
YE: Here’s the thing. The Trisolaran Interstellar Fleet is composed of incredibly massive spaceships. Accelerating them is a slow process. One-tenth the speed of light is only their maximum speed, but they cannot cruise at this speed for long before decelerating as they approach the Earth. Also, the source of propulsion for the Trisolaran ships is matter-antimatter annihilation. In front of each ship is a large magnetic field shaped like a funnel to collect antimatter particles from space. This collection process is slow, and only after a long wait can it gather enough antimatter to allow the ship to accelerate for a brief period. Thus, the fleet’s acceleration occurs in spurts, interspersed by long periods of coasting to collect fuel. This is why the time it takes the Trisolaran Fleet to reach the solar system is ten times longer than the flight time of a small probe.
INTERROGATOR: Then what did you mean by “almost” just now?
YE: We’re talking about the speed of space flight within a certain context. Outside this context, even backward human beings are capable of accelerating certain objects to close to the speed of light.
INTERROGATOR: (a pause) By “context,” do you mean at the macro scale? At a micro scale, humans can already use high-energy particle accelerators to speed up subatomic particles to near the speed of light. These particles are the “objects” you meant, correct?
YE: You’re very clever.
INTERROGATOR: (points to his earpiece) I have the world’s foremost scientists behind me.
YE: Yes, I meant subatomic particles. Six years ago, in the distant Trisolaran stellar system, Trisolaris accelerated two hydrogen nuclei to near the speed of light and shot them toward the solar system. These two hydrogen nuclei, or protons, arrived at the solar system two years ago, then reached the Earth.
INTERROGATOR: Two protons? They only sent two protons? That’s almost nothing.
YE: (laughs) You also said “almost.” That’s the limit of Trisolaran power. They can only accelerate something as small as a proton to near the speed of light. So over a distance of four light-years, they can only send two protons.
INTERROGATOR: At the macroscopic level, two protons are nothing. Even a single cilium on a bacterium would include several billion protons. What’s the point?
YE: They’re a lock.
INTERROGATOR: A lock? What are they locking?
YE: They are sealing off the progress of human science. Because of the existence of these two protons, humanity will not be able to make any important scientific developments during the four and a half centuries until the arrival of the Trisolaran Fleet. Evans once said that the day of arrival of the two protons was also the day that human science died.
INTERROGATOR: That’s… too fantastic. How can that be?
YE: I don’t know. I really don’t know. In the eyes of Trisolaran civilization, we’re probably not even primitive savages. We might be mere bugs.
It was near midnight by the time Wang Miao and Ding Yi walked out of the Battle Command Center. They had been invited to listen to Ye’s interrogation due to Wang’s involvement in the case and Ding Yi’s connection to Ye’s daughter.
“Do you believe what Ye Wenjie said?” Wang asked.
“Do you?”
“Many things that have happened recently are incredible. But for two protons to block all progress of human science? That seems…”
“Let’s focus on one thing first. The Trisolarans were able to shoot two protons at the Earth from four light-years away and they both reached the target! That accuracy is incredible! There are numerous obstacles between there and here: interstellar dust, for example. And both the solar system and the Earth are moving. It would require more precision than shooting a mosquito here from Pluto. The shooter is beyond imagination.”
Wang’s heart clenched when he heard “shooter.” “What do you think this means?”
“I don’t know. In your impression, what do subatomic particles such as neutrons and protons look like?”
“They would just look like a point. Though the point has internal structure.”
“Luckily, the image in my head is more realistic than yours.” As Ding spoke, he tossed his cigarette butt away. “What do you think that is?” He pointed at the butt.
“A cigarette filter.”
“Good. Looking at that tiny thing from this distance, how would you describe it?”
“It’s practically just a point.”
“Right.” Ding walked over and picked up the butt. In front of Wang’s eyes he tore it open and revealed the yellowed spongy material inside. Wang smelled burnt tar. Ding continued, “Look, if you spread this little thing open, the adsorbent surface area can be as large as a living room.” He tossed the filter away. “Do you smoke pipes?”
“I no longer smoke anything.”
“Pipes use another type of more advanced filter. You can get one for three yuan. The diameter is about the same as a cigarette filter, but it’s longer: a small paper tube filled with active charcoal. If you take out all the active charcoal, it will look like a little pile of black particles, like mouse droppings. But added together, the adsorbent surface formed by the tiny holes inside is as large as a tennis court. This is why active charcoal is so adsorbent.”
“What are you trying to say?” Wang asked, listening intently.
“The sponge or active charcoal inside a filter is three-dimensional. Their adsorbent surfaces, however, are two-dimensional. Thus, you can see how a tiny high-dimensional structure can contain a huge low-dimensional structure. But at the macroscopic level, this is about the limit of the ability for high-dimensional space to contain low-dimensional space. Because God was stingy, during the big bang He only provided the macroscopic world with three spatial dimensions, plus the dimension of time. But this doesn’t mean that higher dimensions don’t exist. Up to seven additional dimensions are locked within the micro scale, or, more precisely, within the quantum realm. And added to the four dimensions at the macro scale, fundamental particles exist within an eleven-dimensional space-time.”
“So what?”
“I just want to point out this fact: In the universe, an important mark of a civilization’s technological advancement is its ability to control and make use of micro dimensions. Making use of fundamental particles without taking advantage of the micro dimensions is something that our naked, hairy ancestors already began back when they lit bonfires within caves. Controlling chemical reactions is just manipulating micro particles without regard to the micro dimensions. Of course, this control also progressed from crude to advanced: from bonfires to steam engines, and then generators. Now, the ability for humans to manipulate micro particles at the macro level has reached a peak: We have computers and nanomaterials. But all of that is accomplished without unlocking the many micro dimensions. From the perspective of a more advanced civilization in the universe, bonfires and computers and nanomaterials are not fundamentally different. They all belong to the same level. That’s also why they still think of humans as mere bugs. Unfortunately, I think they’re right.”