4 papers
A hardware-efficient leakage-reduction scheme for quantum error correction with superconducting transmon qubits
Francesco Battistel, Boris M. Varbanov, Barbara M. Terhal
Leakage outside of the qubit computational subspace poses a threatening challenge to quantum error correction (QEC). We propose a scheme using two leakage-reduction units (LRUs) th…
Leakage detection for a transmon-based surface code
B. M. Varbanov, F. Battistel, B. M. Tarasinski +4
Leakage outside of the qubit computational subspace, present in many leading experimental platforms, constitutes a threatening error for quantum error correction (QEC) for qubits.…
Spectral Quantum Tomography
Jonas Helsen, Francesco Battistel, Barbara M. Terhal
We introduce spectral quantum tomography, a simple method to extract the eigenvalues of a noisy few-qubit gate, represented by a trace-preserving superoperator, in a SPAM-resistant…
A fast, low-leakage, high-fidelity two-qubit gate for a programmable superconducting quantum computer
M. A. Rol, F. Battistel, F. K. Malinowski +8
A common approach to realize conditional-phase (CZ) gates in transmon qubits relies on flux control of the qubit frequency to make computational states interact with non-computatio…