The Qubit Control RF Module (QCM-RF II) is the ideal RF signal generator specifically designed for qubit control within the 2 - 18.5 GHz frequency range.
High-precision pulses are generated in real-time by the combination of an on-board waveform engine and a real-time sequence processor. Together, they utilize 16k wave memory to support advanced pulse envelopes, including Gaussian and DRAG shapes, as well as shaping the outputs by amplitude, offset, modulation frequency, and phase. Defined on a 1 ns time grid, I and Q pulses can be updated at nanosecond resolution. The pulses are upconverted to the RF domain via the integrated local oscillator and IQ mixers with ultra‑low noise and high stability, enabling high‑fidelity microwave control of qubits.
The Qubit Readout RF Module (QRM-RF) operates within the Qblox Cluster mainframe, offering seamless integration and scalability. A single 19” rack Cluster unit can accommodate up to 20 QRM-RF modules, providing density for up to 20 input and 20 output channels.
Qblox’s modular architecture allows interoperability between the QRM-RF and other modules, including the Qubit Readout Module (QRM), Qubit Control Modules (QCM and QCM‑RF II), Qubit Readout and Control (QRC), and the Qubit Timetag Module (QTM).
Using the proprietary SYNQ and LINQ interconnect protocols, all modules communicate and run in synchrony. This architecture ensures precise alignment of control, readout, and processing, allowing users to configure a control stack that matches their quantum system and supports high‑fidelity operation.
“ As we build integrated multimodal quantum data centers and connect quantum processors directly with HPC infrastructures, transparent, low-level hardware control is essential to delivering scalable, hybrid quantum–classical computing environments. Qblox enables this level of hardware control through Q1ASM, giving us at Qilimanjaro the precision and flexibility needed to advance our analog and digital QPUs."
“ Since 2021, Qblox has been a vitalpartner in our mission to build a 100-qubitquantum computer for Swedish industry.Their robust, scalable control systemdelivers outstanding analog performance,allowing us to push quantum boundarieswithout hardware limitations. Withunparalleled channel synchronizationand fast real-time feedback, we can fullytune up our 20-qubit systems in under 30minutes."
“Since 2022, Qblox has been a trustworthy partner, providing the qubit-agnostic control electronics essential to our vision. Their Cluster’s SYNQ & LINQ protocols enabled the ultra-low latency required for our fast, parallel qubit characterization. We highly recommend Qblox for their professionalism and innovative approach to quantum computing challenges.'
“ Qblox cluster is certainly one of the most important elements in our new spin qubit lab. The easy-to-use and compact system allows us to set up a spin qubit control system within a couple of hours. We have used it for the RF reflectometry readout of our first in-house quantum dot! I look forward to getting more exciting results by using the Qblox cluster. What I also appreciate is the good communication and friendship between Qblox and the customers."
“ The Qblox control stack has transformed our lab by replacing four separate pieces of equipment with a single, integrated 'blue box'. By combining RF/MW generation with coincidence detection and timetagging, our students achieve results faster. Combined with their excellent, fast-response support, Qblox is essential for our state-of-the-art research."
“ Qblox support team’s expertise and quick response to our queries exceeded my expectations, making the setup process a breeze. Their continuous support allows our PhDs and postdocs to excel in their measurements without worrying about the control electronics. I’m very impressed by Qblox’s commitment to supporting their products and their users."
“The QTM delivers state-of-the-art performance for field-deployed quantum communication. It stands out through its immediate reconfiguration via a Python API and seamless integration with the Qblox Cluster. This allows for full orchestration of quantum memories and photon sources—all within a single, unified setup."
“ I've been impressed by the technical background and helpful attitude of the team we have supporting us. They are always fast to respond, really helpful and give thoughtful answers. It's fantastic."
“ Qblox support team's expertise and quick response to our queries exceeded my expectations, making the setup process a breeze. Their continuous support allows our PhDs and postdocs to excel in their measurements without worrying about the control electronics. I’m very impressed by Qblox’s commitment to supporting their products and their users."
The QCM-RF II module creates signals parametrized by variables such as gain, offset, NCO frequency and phase, etc., and also by waveform envelopes stored in memory.
This parametrization is controlled by the AWG paths of the Q1 sequencer, which have two waveform paths each (hereon referred to as path 0 and 1). The outputs of the AWG paths are mixed with the NCO by the onboard IQ mixers, enabling operation as modulated IQ signals. These paths, after mixing with the LO, can be connected to any output of the instrument (i.e., O1 and O2). The sequencers also control two marker output channels. The RF upconversion stage features two independent IQ mixers on board for generating the output signals in the range of 2-18.5 GHz.
The Qubit Control RF Module (QCM‑RF II) operates within the Qblox Cluster mainframe, ensuring straightforward integration and scalability. With 2 analog and 2 digital outputs per module, a 19” rack Cluster unit can accommodate up to 20 QCM‑RF II modules, delivering a total of 40 output channels for high-fidelity qubit control.
Qblox’s modular architecture allows interoperability between the QCM-RF II and other modules, including the Qubit Control Module (QCM), Qubit Readout Modules (QRM and QRM‑RF), and the Qubit Timetag Module (QTM). Using the proprietary SYNQ and LINQ interconnect protocols, all modules communicate and run in synchrony. This architecture ensures precise alignment of control, readout, and processing, allowing users to configure a control stack that matches their quantum system and supports high‑fidelity operation.
SYNQ protocol guarantees < 1 ns synchronization of all channels, with ps-level jitter and great phase coherence for precise qubit control and the highest fidelities.
LINQ protocol provides fast, scalable feedback in < 400 ns, featuring all-to-all connectivity for conditional playback and conditional branching.
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