Physical Review Letters
Follow
In the Shadow of the Hadamard Test: Using the Garbage State for Good and Further Modifications
Author(s): Paul K. Faehrmann, Jens Eisert, and Richard Kueng
The Hadamard test is one of the pillars on which quantum algorithm development rests and, at the same time, is naturally suited for the intermediate regime between the current era of noisy quantum devices and complete fault tolerance. Its applications use measurements of the auxiliary qubit to extra… [Phys. Rev. Lett. 135, 150603] Published Thu Oct 09, 2025
