251 citations · 996 across the 8 of their papers we have counts for
8 papers
Variational preparation of finite-temperature states on a quantum computer
R. Sagastizabal, S. P. Premaratne, B. A. Klaver +13
The preparation of thermal equilibrium states is important for the simulation of condensed-matter and cosmology systems using a quantum computer. We present a method to prepare suc…
High-fidelity controlled-Z gate with maximal intermediate leakage operating at the speed limit in a superconducting quantum processor
V. Negîrneac, H. Ali, N. Muthusubramanian +9
We introduce the sudden variant (SNZ) of the Net Zero scheme realizing controlled- (CZ) gates by baseband flux control of transmon frequency. SNZ CZ gates operate at the speed l…
Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor
M. A. Rol, L. Ciorciaro, F. K. Malinowski +7
We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure t…
Calculating energy derivatives for quantum chemistry on a quantum computer
T. E. O'Brien, B. Senjean, R. Sagastizabal +5
Modeling chemical reactions and complicated molecular systems has been proposed as the `killer application' of a future quantum computer. Accurate calculations of derivatives of mo…
Error Mitigation by Symmetry Verification on a Variational Quantum Eigensolver
R. Sagastizabal, X. Bonet-Monroig, M. Singh +11
Variational quantum eigensolvers offer a small-scale testbed to demonstrate the performance of error mitigation techniques with low experimental overhead. We present successful err…
Low-cost error mitigation by symmetry verification
X. Bonet-Monroig, R. Sagastizabal, M. Singh +1
We investigate the performance of error mitigation via measurement of conserved symmetries on near-term devices. We present two protocols to measure conserved symmetries during the…
Chip-to-chip entanglement of transmon qubits using engineered measurement fields
C. Dickel, J. J. Wesdorp, N. K. Langford +6
While the on-chip processing power in circuit QED devices is growing rapidly, an open challenge is to establish high-fidelity quantum links between qubits on different chips. Here,…
Experimentally simulating the dynamics of quantum light and matter at ultrastrong coupling
N. K. Langford, R. Sagastizabal, M. Kounalakis +6
The quantum Rabi model describing the fundamental interaction between light and matter is a cornerstone of quantum physics. It predicts exotic phenomena like quantum phase transiti…