论文信息 - Invariants of motion for an N-level system

Invariants of motion for an N-level system

For an N-level system interacting with N-1 laser fields, it is shown that there exist in general N2-N+1 independent invariants of motion when the Hamiltonian assumes a time-independent form under a suitable unitary transformation. Two different procedures to obtain these invariants are presented. The special case of N=3 is considered in detail and two new independent invariants are shown to exist in addition to the five already known. Explicit expressions for these two invariants are also given.

K. Mallesh | G. Ramachandran

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