| 单词 | density matrix |
| 释义 | density matrix [`den·sǝd·ē `mā·triks] QUANTUM MECHANICS A matrix ρmn describing an ensemble of quantum-mechanical systems in a representation based on an orthonormal set of functions ϕn; for any operator G with representation Gmn , the ensemble average of the expectation value of G is the trace of ρG. |
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