How does Quantum Computer view Classical World?


An very intersting quetion from Dave Bacon’s Blog:

If you were a quantum computer, would the mystery you be working on not be the mystery of quantum theory but the mystery of the classical world?

Dave Bacon

So how can we think this question? First I think as a quantum computer,it is easy to simulate the classical one. Because at some term,classical physics is the approximation of the quantum world. Or we can say quantum world includes the classical one.

But the question is not as simple as 3-1=2. For example, considered the flat world,or 2D world, the quantum theory is different for 3D or higher world. In flat world, the fraction statistics appears. The spin of electron becomes fractions, not the multiple of 1/2. So we can imagine that when quantum computer want to know the classcial world, it will face the simmilar problems. Suppose we live in a absolutely quantum world, and we know nothing about classical world, even the concept such as trajectory. To construct these concepts will costs us a lot of efforts. In fact, the concept created by quantum computer to discribe the classical world must be the spread of quantum world concept. So the answer to the question is YES.

It will benefit me from viewing the problems in the inverse way and in many different direction. I must to learn from the Dave Bacon’s way of thinking physics.

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Nash’s Mind


I read an interview in the NewScientist.com to John Nash, the 1994 Nobel prize for economics winner. The movie Beautiful Mind which based on his life got a great success. I saw the movie, and after that I was interested to Nash. I wanted to know more about him, so I borrowed his biography and read deeply. After reading it, I still known little about his mind. I didn’t know why could he overcome the mental illness. I didn’t know how did he live after getting Nobel prize. This interview gives me a lot of information about his life now.I will read this interview carefully.

Two Lifes


Immortal may be the oldest dream of human beings. I believe almost everyone want to get the eternal life. But unfortunately, or fortunately, because of the errors during the cells duplicating, no one ever get immortal.

The errors are inevitable, because they are the result of the second law of thermodynamics that entropy of the isolated systems canot decrease. To hold the energetic life we must have enough negentropy. At the end of life, the englobement of negentropy becomes less and less. So the death can be regarded as the entropy of somebody’s life being maximized because of lackage of negentropy.

Now imagine that if we have solved the problem of negentropy and make people have two lifes:one is growing older and older; the other is growing younger and younger. At the end of life, man becomes a baby or just an oosperm. I think it will be good idea to be written a science fiction. How does ethic evolves, and the society? Should the marriage be necessary? If the oosperm can disintergrate again, should it be regarded as an immortal? There are many interesting questions I can ask on the idea. If you were me, I think you will get your answers.

After all, if we get enternal life, or twice life, our life will be absolutely different. I like this diffenence. How about you?