A Non-Hermitian Approach of Dyson Boson Expansion in Interacting Boson Model

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Deng Weizhen, Yang Zeshen and Wang Yucheng. A Non-Hermitian Approach of Dyson Boson Expansion in Interacting Boson Model[J]. Chinese Physics C, 1993, 17(S3): 285-290.
Deng Weizhen, Yang Zeshen and Wang Yucheng. A Non-Hermitian Approach of Dyson Boson Expansion in Interacting Boson Model[J]. Chinese Physics C, 1993, 17(S3): 285-290. shu
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Received: 1992-06-15
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A Non-Hermitian Approach of Dyson Boson Expansion in Interacting Boson Model

  • Department of Physics, Peking University, Beijing, China

Abstract: Based on the Dyson boson expansion and the modified Jancovici-SchifF substitution, a one-one correspondence between the fermion collective pair space and interacting boson space is obtained. It is shown that one can uniquely determine the boson mappings of fermion operators and the IBM Hamiltonian takes a noii-Hermitian form. The fermion matrix elements are directly calculated in the IBM boson space. The rather complicated state projection, which is used to remove the spurious states, can also be performed there.

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