QFIBase¶
- class QFIBase(qfi_method='lin_comb_full')[소스]¶
기반 클래스:
DerivativeBase
Base class for Quantum Fisher Information (QFI).
Compute the Quantum Fisher Information (QFI) given a pure, parameterized quantum state.
The QFI is:
[QFI]kl= Re[〈∂kψ|∂lψ〉−〈∂kψ|ψ〉〈ψ|∂lψ〉] * 4.
- 매개변수
qfi_method (
Union
[str
,CircuitQFI
]) – The method used to compute the state/probability gradient. Can be either aCircuitQFI
instance or one of the following pre-defined strings'lin_comb_full'
,'overlap_diag'`
or'overlap_block_diag'`
.- 예외 발생
ValueError – if
qfi_method
is neither aCircuitQFI
object nor one of the predefined strings.
Attributes
- qfi_method¶
Returns
CircuitQFI
.- 반환 형식
- 반환
CircuitQFI
.