What effect will quantum computers have on our world?

If someone could tell me what exactly they would do that our normal computers can't do? Would they have intelligence? Emotion?

How will this effect human life? Good or bad thing?

What effect will quantum computers have on our world?norton antivirus 2007

For the most part? Zilch. There are crude quantum computers now. They utilise a functon of quantum mechanics called superposition - classical computers are made of bits, that have to be a 0 or a 1 - quantum computers are composed of qubits (from quantum bits and pronounced 'cubits') which can be 1, 0 or (this is gonna be tough if you've never read anything about quantum mechanics) - a superposition of both states.

Quantum computers would be able to compute using resources in parallel dimensions and would be able to do many things incredibly fast - many, many times faster than computers today. One of the reasons the governments are so interested in them that one of the things their rapid algorithms would be able to do is factor numbers very quickly. That won't mean much to you I expect but modern encryption is all about the difficulty of factoring incredibly large (several hundred digit) prime numbers. If someone had a computer that could do this they might be able to read the governments secret messages, steal millions of dollars from banks, and so on. Quantum computers aren't likely to be any more capable of sentience than regular computers. Making a computer faster does not make it more human.