Quantum Computing Center
Experiments
The ICSC-QC1 system is dedicated to superconducting quantum computing activities in the frame of the National Center for High-Performance, Big Data and Quantum Computing. Inaugurated in May 2024, this has been the first superconducting quantum computing center in Italy. It drives research that highlights the fundamental relation between hardware and quantum algorithms development in the Noisy and Intermediate Scale era. In the frame of several collaborative projects, this platform is dedicated to the development of advanced calibration, error-correction and mitigation routines for high-fidelity multi-qubit systems, the implementation on a machine level of advanced quantum algorithms for quantum information, entanglement generation, condensed matter physics simulations and specific purpose applications in finance. Finally, ICSC-QC1 is tailored for quantum schooling purposes: high-school and undergraduate students can visit the laboratory and learn about applied quantum computing, bachelor; master and Ph.D. students within the University of Napoli “Federico II” and abroad are currently developing their projects on these activities, and more are welcome to join!
Facilities
Bluefors XLD 1000 SL (Partenope, nominal base temperature of 10 mK): a dilution refrigerator with a cooling power of 1000µW and 5 available sideloaders for cryogenic lines (panel (a) of figure 1). Currently, each of them hosts a set of 32 microwave coaxial cables for drive, flux-tuning, readout, and travelling-wave parametric amplifiers (TWPAs) pumping, for a total of 64 attenuated drive lines, 64 superconducting fast RF flux lines, 8 pump lines, 8 readin and 8 readout lines, and other spare lines for any additional experiment. Standard readout is performed employing double-junction isolators and high-electron mobility transistors (HEMT) located at the 4 K plate of the cryostat. Partenope hosts a 64 flux-tunable transmon-based quantum processor from Quantware (Tenor), where couplings between qubits in a rectangular lattice is implemented through high-frequency bus resonators. Currently, the processor is under characterization.
Bluefors LD400 (Ligea, nominal base temperature of 10 mK): a dilution refrigerator with a cooling power of 400µW hosting a reduced number of connections compared to Partenope: 21 drive lines, 21 flux-tuning lines, 4 readin and 4 readout lines. Also in Ligea, standard readout is performed employing double-junction isolators and high-electron mobility transistors (HEMT) at the 4 K plate of the cryostat. Ligea hosts a 21 flux-tunable transmon-based quantum processor from Quantware (Contralto-D).
Qblox room – temperature electronics for control/ readout / tunability of sQPUs with +60 qubits 5 Clusters equipped with QCM_RF control modules, QRM_RF readout modules, QCM flux pulses modules, QRM control and readout modules, 2 low – noise SPI racks with voltage and current DC generators.
