Quantum Methods
Variational Trace Distance Estimation
Introduced by Chen et al. in Variational Quantum Algorithms for Trace Distance and Fidelity EstimationVariational Trace Distance Estimation, or VTDE, is a variational algorithm for trace norm estimation that only involves one ancillary qubit. Notably, the cost function in VTDE gathers information from a single-qubit observable and thus could avoid the barren plateau issue with logarithmic depth parameterized circuits.
Source: Variational Quantum Algorithms for Trace Distance and Fidelity Estimation
Papers
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