2 papers
quant-ph2026
Sample- and Hardware-Efficient Fidelity Estimation by Stripping Phase-Dominated Magic
Guedong Park, Jaekwon Chang, Yosep Kim +2
Direct fidelity estimation (DFE) is a famous tool for estimating the fidelity with a target pure state. However, such a method generally requires exponentially many sampling copies…
quant-ph2026
Efficient direct quantum state tomography using fan-out couplings
Jaekwon Chang, Guedong Park, Hyunseok Jeong +2
Characterizing quantum states is essential for validating quantum devices, yet conventional quantum state tomography becomes prohibitively expensive as system size grows. Direct to…