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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 -…
Microwave-activated gates between a fluxonium and a transmon qubit
Alessandro Ciani, Boris M. Varbanov, Nicolas Jolly +2
We propose and analyze two types of microwave-activated gates between a fluxonium and a transmon qubit, namely a cross-resonance (CR) and a CPHASE gate. The large frequency differe…
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…
Phase flip code with semiconductor spin qubits
F. van Riggelen, W. I. L. Lawrie, M. Russ +6
The fault-tolerant operation of logical qubits is an important requirement for realizing a universal quantum computer. Spin qubits based on quantum dots have great potential to be…