What kind of revolution would it be if electric currents were able to “fly” freely through conductors like the kung-fu masters in martial arts novels, without any resistance and without consuming a single ounce of energy? Superconductivity technology is one of them. If the electric current can “fly” freely in the conductor without any obstruction, how much it will bring changes to our life! It's not just a simple physical phenomenon, it's a fantastic transformation that will involve every corner of our daily lives. Imagine if we compare our city to a busy traffic artery, then the flow of electric current in a conductor is like a vehicle moving through the city. And superconductor technology, as if to this trunk line imposed a magic magic, so that all the vehicles are able to speed like light speed, in an unimpeded free riding on the highway, there is no longer the trouble of traffic jams, there is no traffic light waiting, everything has become so smooth, so efficient.

Superconductivity is actually like a magical secret in nature, waiting for us to unravel its mysterious veil. To put it simply, superconductivity, is that under that particular, as if by magic, low-temperature conditions, certain materials are able to display an amazing quality - their electrical resistance, as if by casting a disappearing spell, magically drops to zero. If the electric current is an elegant skater, then superconducting materials are the smooth surface of the ice like a mirror. When the temperature is lowered to that mysterious critical point, the electric current is like finding its own paradise, and begins to skate freely on this ice surface, without resistance and with ease. It no longer needs to struggle to overcome the obstacles as it does in ordinary conductors, but can travel through them without any obstacles, just like fish swimming in the water and birds soaring in the air. On the contrary, ordinary conductors, they are like the rough sandy beaches, the current flow in them, like a person dragging heavy luggage on the beach, walking hard, every step is full of hard work and fatigue. Resistance is like an invisible shackle that binds the freedom of the current, making its flow slow and inefficient.

The “superpower” of superconducting technology is not only reflected in the zero resistance, but also a remarkable phenomenon called the “Meissner effect”. When a superconductor enters a superconducting state, it is able to repel magnetic fields, like a graceful dancer, skillfully avoiding all obstacles. This allows superconducting materials to levitate in strong magnetic fields, giving scientists an extremely cool experimental scenario: you can see a magnetically levitated train floating on the track without touching the track, almost as if it were dancing in the air.

Of course, superconducting technology is not without its challenges. First, the vast majority of superconducting materials require extremely low temperatures to achieve a superconducting state, which is like a delicious ice cream that's hard to come by until you find it in the middle of an arctic winter; and second, it's always been a scientist's dream to find materials that work at high temperatures and still maintain their superconducting state. It's like finding the right pair of shoes that look good and are comfortable, but are always hard to come across. Despite the challenges, the future of superconductivity remains bright. As scientific research continues, many researchers are working hard to find high-temperature superconducting materials, which will open up more application scenarios. If successful, power transmission, transportation and even computing power will see a revolution.

Superconducting technology is like an experienced driver who can easily traverse a complex city, allowing electric current to ride freely through conductors. Not only does it offer infinite possibilities for our lives, it also breathes new life into the advancement of science and technology. The next time you see one of those gleaming superconducting maglev trains, or enjoy clearer images during a medical checkup, think about the superconducting technology that's quietly dedicating itself behind the scenes. It is changing our world and our lives in a light and elegant way.

（Writer：Matti）