例句與造句

1. and this gives the time evolution operator between time and time.
2. How a quantum system changes in time is governed by the time evolution operator.
3. But to see it, you would have to apply the exact time evolution operator to it.
4. Without loss of generality, assume the field is uniform points in \ mathbf { \ hat { z } }, so that the time evolution operator is given as
5. :: : Quantum mechanics does have a kind of " interaction between possible worlds ", but it's limited by the fact that the time evolution operator is still linear.
6. It's difficult to find time evolution operator in a sentence. 用time evolution operator造句挺難的
7. As can be seen, we need to use both the forward time evolution operator U ( t, 0 ) as well as the backward time evolution operator \ dagger { U } ( t, 0 ).
8. As can be seen, we need to use both the forward time evolution operator U ( t, 0 ) as well as the backward time evolution operator \ dagger { U } ( t, 0 ).
9. It can be seen that such a time evolution operator acting on a general spin state of a spin-1 / 2 particle will lead to the precession about the axis defined by the applied magnetic field ( this is the quantum mechanical equivalent of Larmor precession)
10. :Let us imagine you could work out what the initial state was ( this is what you could do assuming the hamiltonian was time independent, and you applied the time evolution operator with a negative time ), that does not mean you could communicate with that person.
11. It is to be noted that the e ^ { \ frac {-iat } { \ hbar } } factor only contributes to the overall phase of the operator and can therefore be ignored to yield a new time evolution operator that is physically indistinguishable from the original operator.
12. This implies that the time evolution operator in a Dyson series calculation will not evolve a field configuration obeying Q _ B | \ Psi _ i \ rangle = 0 into a later configuration with Q _ B | \ Psi _ f \ rangle \ neq 0 ( or vice versa ).
13. The main advantage of the Magnus proposal is that the truncated series very often shares important qualitative properties with the exact solution, at variance with other conventional unitary character of the time evolution operator in quantum mechanics is also preserved ( in contrast, e . g ., to the Dyson series solving the same problem ).
14. Several further results follow from this, such as Fermi's golden rule, which relates the rate of transitions between quantum states to the density of states at particular energies; or the Dyson series, obtained by applying the iterative method to the time evolution operator, which is one of the starting points for the method of Feynman diagrams.
15. However, if you think of the " time evolution operator " that takes A to A'and B to B'in the phase space, that operator is linear in the following sense : if you start with pA + qB, representing a probability p of being in state A and a probability q of being in state B, then the operator has to take that to pA'+ qB '.