274 citations · 932 across the 21 of their papers we have counts for
3 papers · 1 filter
Thrifty shadow estimation: re-using quantum circuits and bounding tails
Jonas Helsen, Michael Walter
Shadow estimation is a recent protocol that allows estimating exponentially many expectation values of a quantum state from ``classical shadows'', obtained by applying random quant…
Optimizing sparse fermionic Hamiltonians
Yaroslav Herasymenko, Maarten Stroeks, Jonas Helsen +1
We consider the problem of approximating the ground state energy of a fermionic Hamiltonian using a Gaussian state. In sharp contrast to the dense case, we prove that strictly -…
Spectral estimation for Hamiltonians: a comparison between classical imaginary-time evolution and quantum real-time evolution
Maarten Stroeks, Jonas Helsen, Barbara Terhal
We present a classical Monte Carlo (MC) scheme which efficiently estimates an imaginary-time, decaying signal for stoquastic (i.e. sign-problem-free) local Hamiltonians. The decay…