HPD Superconducting and Spin Qubit Pre-Screening

2X Faster Development Cycles for Quantum Engineers by Pre-Screening at 50 mK

Quantum system engineers working at milli-Kelvin temperatures are faced with the difficulties and inconveniences of long development cycles. The major factors leading to lengthy and costly development cycles include

•Complicated fabrication process with multiple additive and subtractive steps required to produce a superconducting or spin qubit device

•Time-consuming wire bonding and expensive packaging processes prior to cryogenic test and measurement

•Testing devices at < 15 mK requires dilution refrigeration (DR) and long cooldown times exceeding 30 hours

•Qubits that fail final deployment due to poor performance or parameter offsets require warming up the system and loading a new device

FormFactor and Keysight have collaborated to develop an integrated measurement solution for Pre-Screening Qubit Devices that allows quantum system engineers to eliminate wire-bonding and packaging from cryogenic test processes and to provide critical qubit performance parameters at 50 mK to enable streamlined deployment in their existing dilution refrigerators at 20 mK to enhance development cycle times by more than 2X. The joint integrated measurement solution is fully optimized for qubit pre-characterization applications which eliminates the time-consuming process of selecting each individual piece of equipment and integrating it. The system returns initial qubit parameters to accurately pass/reject devices prior to final deployment in a dilution refrigerator. An example qubit pre-characterization routine implemented on the Model 106 integrated solution by a leading superconducting circuit developer, Seeqc, can be found in the final section of this brochure.

The FormFactor Model 106 integrated measurement solution utilizes Keysight’s Labber Quantum software and the Keysight PXI-based quantum control solution to provide a turnkey cryogenic system with quickcooldowns to less than 50 mK in approximately 16 hours. The system is used to rapidly characterize and screen superconducting or spin qubit devices prior to deployment.

Keysight PXI-based Quantum Control System With Labber Control Software

The Model 106 solution is a turnkey experimental platform that utilizes the Keysight PXI-based quantum control system and Labber Quantum software for streamlined measurements and data acquisition. The backbone of the Keysight PXI platform is the M9037A Embedded Controller that has been configured for qubit pre-characterization measurements. The PXI modules have been selected so that a user can switch between time-domain measurements and steady-state measurements

The PXI-chassis is configured with the following modules:

• (2) M3202A Arbitrary Waveform Generators

• M9037A Embedded Controller

• M9615A Source/Measure Unit (SMU)

• M9347A Dual Direct Digital Synthesizer (DDS) for the Local Oscillator (LO)

• M9300A Frequency Reference (REF)

• M3102A Digitizer for Analog-to-Digital Conversion (ADC)

• M9804A Vector Network Analyzer (VNA)