# Relaxation rate

1. Nov 5, 2011

### mehdi86

hello
i encountered for relaxation term in studing "role of single qubit decoherence time in adiabatic quantum computation":
relaxation rate=n(Mx^2+Mz^2)s(w10);
n=number of qubits
s(w10) is summetrized spectral density ofthe baths
Mx=((1/n)$\sum\(sigma x^{i}_{1,0})^2$))^(1/2)
Mz=((1/n)$\sum\(sigma z^{i}_{1,0})^2$))^(1/2)

where 1,0 is the two lowest states.
whats the origin of relaxation rate equation? can you give me the reference that i know how it gained?

2. Nov 6, 2011

### mehdi86

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