# Quantum Computing problem [Quantum Teleportation] (Nelson and Chuang)

1. Jun 2, 2007

### maverick280857

Hello

I am reading Nelson and Chuang's book on Quantum Computation. On pages 26-7 they describe quantum teleportation. I am facing essentially a math problem in going from the expression

$$\left|\psi_{2}\right> = \frac{1}{2}\left[\alpha(\left|0\right> + \left|1\right>)(\left|00\right> + \left|11\right>) + \beta(\left|0\right> - \left|1\right>)(\left|10\right> + \left|01\right>)\right]$$

to the expression

$$\left|\psi_{2}\right> = \frac{1}{2}\left[\left|00\right>(\alpha\left|0\right> + \beta\left|1\right>) + \left|01\right>(\alpha\left|1\right> + \beta\left|0\right>) + \left|10\right>(\alpha\left|0\right> - \beta\left|1\right>) + \left|11\right>(\alpha\left|1\right> - \beta\left|0\right>)\right\]$$

Would appreciate any help/suggestions to try to tackle this.

Thanks.

PS--It seems to be a regrouping of terms..I guess, but I still can't get it directly :P

Last edited: Jun 2, 2007
2. Jun 2, 2007

### maverick280857

got it...thanks

3. Feb 4, 2011

4. Feb 5, 2011

### maverick280857

Wow, been a long time..3 years. Thanks :-)