We use cookies to ensure you get the best experience on our website. By using the IFPA wiki, you consent to our use of cookies.

R7

From IFPA wiki
  1. Find the laws of transformation of light-cone coodinate under a boost and give the expression of proper time in terms of these coodinates.
  2. Show that the functions that define the generalised Bogolyubov transform must have a wronskian equal to i to conserve the algebra of creation and annihilation operators.
  3. What is the time dependence of conformal time in a radiation-dominated universe and in a matter-dominated universe? What is the value of conformal time today? At what value of the conformal time did the cosmic microwave background decouple ([math]z=1000[/math])?
  4. Calculate (in K) the Hawking temperature of a 1-solar-mass black hole. How large should the acceleration of an observer be for the corresponding Unruh temperature to be 300 K?

About

Contact

IFPA Wiki maintained by Atri B.

ULgLogo.png     Logo-star.png