By Cecilia（邓思雨） from 2302

Good morning everyone. I’m Cecilia from 2302. It is my great honor to stand here today and share with you a fascinating realm that is stranger than magic. Here, a cat can be both dead and alive; two particles separated by galaxies can share secrets instantly; and the universe itself is a poem written in probabilities. Welcome to the world of quantum physics.  

Nobel laureate Richard Feynman once said: "If you think you understand quantum physics, you don't understand quantum physics." This is not self-deprecation—it’s the most honest confession about the quantum realm. The chips beneath our feet, the satellites above our heads, the lasers in our hands—all are gifts of quantum theory. Yet its essence continues to shatter our understanding of "reality."  

Newtonian mechanics taught us to predict when an apple falls. Quantum physics forces us to ask: Before it falls, does the apple exist in all possible trajectories? Now, let us lift this veil of mystery together.  

In 1935, Erwin Schrödinger proposed a famous thought experiment: A cat in a box with a vial of poison, triggered by a random quantum event. Until observed, the cat is both dead and alive.  

A philosopher’s riddle? No—this is the heart of quantum superposition. Electrons simultaneously pass through two slits; atoms occupy multiple energy states at once. The universe only "chooses" a reality when we observe it.

This raises a haunting question:Does an "objective world" exist independent of observers? Or as physicist John Wheeler declared: "The universe is a participatory universe—we are not just spectators, but actors. If reality is an undeveloped film, observation is the click of the shutter. Are we, unintentionally, shaping the world we see?

Einstein mocked quantum entanglement as "spooky action at a distance," insisting nothing could outpace light. Yet the 2022 Nobel Prize in Physics confirmed: Two entangled particles, even galaxies apart, share states instantaneously.  

Imagine quantum dice: Roll a "6" in Yichang, and its twin in London becomes "6" simultaneously—no signals, no delay. The mechanism remains a mystery, yet it’s already reshaping our future. Quantum communication, quantum computing… We’re weaving tomorrow’s technology with "ghostly threads."  

Deeper still, entanglement hints at the universe’s wholeness. Stars and dust, you and I—perhaps all connected by invisible quantum threads. As William Blake wrote: "To see a World in a Grain of Sand, And a Heaven in a Wild Flower."

Werner Heisenberg revealed: You can never precisely know a particle’s position and momentum. This isn’t a technical limit—it’s a fundamental law of nature.  

Imagine photographing a bird in flight: Brighter light reveals its position but disturbs its path. The quantum world is that bird—observation itself alters the observed.

Yet humanity turned limitation into revolution: Quantum computers harness uncertainty to perform trillions of calculations in parallel. Codes that would take the universe’s lifespan to crack may soon fall in minutes.  

If even the tiniest particles have "free will," do we exist in a cosmic sea of possibilities?  

Friends, quantum physics isn’t confined to equations—it pulses through civilization’s veins: No quantum theory, no transistors, lasers, or MRI scans. Your phone, GPS, internet—all are whispers of quantum ghosts.  

Stephen Hawking said: "We are just standing on the shoulders of giants, trying to touch the stars." Quantum physics adds: The stars were never distant—they sparkle in every atomic leap.  

Finally, picture this: When you light up your phone at midnight, remember—behind that glow lies electrons making ghostly leaps between energy levels. When you gaze at the stars, know—their light began as quantum entangled whispers across cosmic time.  

The greatness of quantum physics lies not in answering all questions, but in revealing the eternity of questions. True science doesn’t erase mystery—it teaches us humility and awe before the unknown.  

So, dear friends—Stay curious. Stay awestruck. And let the poetry of the universe forever move your soul.

Thank you.