
English: 
At the microscopic level of atoms and electrons,
the world obeys the laws of quantum mechanics.
One of the fundamental principles of quantum
mechanics is that it is possible to create
super positions of different physical configurations.
A simple example of this is a hydrogen molecule with only one electron.
The electron could belong to the left proton or to the right proton.
In fact, because it's a quantum object,
it can belong to both.
It's in a quantum super position of being left and right.
Now imagine I decided to encode binary information on the position of the electron.
I call left 0, and right 1.
This means that I can also create a quantum super position of 0 and 1.
A quantum system that has two basic states is called a quantum bit or qubit.
To define the value of a qubit, I need to specify what quantum super position it's in.

Chinese: 
在原子和电子的微观层面世界，遵循着量子力学。
量子力学的一个基本原则是，
它能够创造不同物理结构的态叠加。
举个简单的例子，这是只有一个电子的氢分子。
这个电子可以属于左质子或右质子。
实际上，因为它是个量子对象，
所以它可以同时属于双方。
这就是一个量子的态叠加，能同时在左边和右边。
现在想象一下，我决定在电子的位置上编制二进制信息。
左边为0，右边为1。
这意味着我也能够创造出一个同时处在0和1的量子态叠加。
一个有两个基本状态的量子系统被称作量子比特。
我需要区分量子比特所在的量子态叠加来定义它的量。

English: 
In general, the qubit can be in A0 plus B1.
This becomes very interesting when one considers more than one qubit.
For example, with two qubits, the basic states are 0-0, 0-1, 1-0 and 1-1,
but in fact I am allowed to make any super position of these four states.
So in general, I must write A0-0 plus B0-1, plus C1-0 plus D1-1.
Now you see that to specify the state of two qubits, I need to give four numbers, A, B, C and D.
If I had three qubits, I would need
eight numbers and so on.
Every time I add a qubit, I need twice as many numbers to describe the collective state of these qubits.
Notice the difference with the case of classical bits.
There, each state is completely specified given the value of each bit.

Chinese: 
通常来说，量子比特在A0+B1位置。
在考虑多个量子比特时，这就变得非常有趣了。
举例来说，两个量子比特，基本状态是00， 01，10和11，
但是事实上，我可以用这四个状态造出任何态叠加。
所以总的来说，我必须写成A00+B01+C10+D11。
现在你看到我们需要给出四个编号A、B、C、D
来详细说明两个量子比特的状态。
如果有三个量子比特，那么就需要八个编号，以此类推。
每增加一个量子比特，
需要两倍的编号来描述这些量子比特的集体状态。
注意它与传统比特的区别。
每个传统比特的状态是完全由每个比特的量来决定的。

English: 
In the quantum case, I need to specify which super position of the two to the power N possible states
I have created.
If I have three hundred qubits, I would need 2 to the power of 300 numbers.
There's not even enough particles in the universe to record so many numbers.
This gives you a sense of the enormous complexity one can find in the quantum realm
and the aim of quantum computing is to harness this complexity
to perform certain calculations much faster
than any standard computer ever could.

Chinese: 
而在量子情形下，
我需要确定所创造的2的N次方种可能状态的态叠加。
如果有三百个量子比特，我需要2的300次方的编号。
宇宙中还没有足够的字母来记录如此多的编号。
这给了你一种觉得量子领域有着巨大复杂性的感受
而量子计算机的目的是利用这个复杂性来执行特定的计算
它的速度将远远超过任何标准计算机。
字幕由澳大利亚新南威尔士大学翻译专业祝若愚制作。
