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CLUSTER CONTROL STACKS, INTEGRATED, SYNCHRONIZED AND MODULAR CONTROL

Qblox Cluster is the scalable 19" rack system that can be configured with a combination of modules that can control and readout qubits over a wide frequency range (up to 18.5 GHz). These act as one solid system through the use of our proprietary SYNQ and LINQ backplane system protocols.

  • Hosting up to 20 modules per Cluster in a 4U chassis
  • Ready for surface-code QEC with real-time decoding
  • Up to 80 channels + 80 marker outputs per Cluster
  • Combine Baseband (0-300 MHz) and RF (2-18.5 GHz) modules
  • SYNQ starts modules synchronously <<1 ns
  • LINQ distributes measurement outcomes in <200 ns

QCM CONTROL MODULES ARE THE SOLUTION FOR HIGH-FIDELITY QUBIT CONTROL FROM 0-300 MHz

  • A Qubit Control Module (QCM) hosts 6 sequence processors for flexible multiplexed driving and tracking of up to 6 qubits (or other oscillators). The unleveled noise performance makes it ideal for high-fidelity single- and two-qubit gates. The extremely low offset and gain drift (a few ppm/K) avoid the need for frequent recalibration. This makes the QCM the ideal baseband signal generator to push gate fidelities to the next level.

The advanced sequencer capabilities drastically speed up characterization and calibration experiments (Spectroscopy, Rabi, Chevron, Charge-stability diagrams) by avoiding repeated wave uploading and large overhead in software-controlled loops.

During quantum algorithms, it allows for instance arbitrary single-qubit control (phase and amplitude) from a single pulse pair. Qubit phases can be tracked in real-time using the NCOs which accept virtual Z-gates through phase updates from the sequence processor.

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  • Advanced distributed sequence processing
  • Multiplexed control of up to 6 qubits
  • Base-band operation or IQ-mode for single-sideband upconversion
  • Real-time control: amplitude, offset, modulation frequency, modulation phase (virtual Z-gates)
  • External instrument control by 4 marker outputs
  • Offset instructions allow constructing arbitrarily long (modulated) signals
  • LINQ allows for low-latency interaction with all other modules.
  • Synchronized to all other modules with SYNQ protocol.
  • Real-time modulation and mixer corrections

Cluster Qubit Control Module 0-300 MHz | Specifications

Analog output channels

4

Analog bandwidth (-3 dB)

300 MHz

DAC sample rate

1 GSPS

DAC resolution

16 bit

Trigger latency

<100 ns

Output range (in a 50 Ω load)

5 Vpp

Rise/fall time (10%-90%)

1.2 ns

THD (100 MHz, 1 Vpp in a 50 Ω load)

66 dB

Voltage noise density (at 1 MHz in a 50 Ω load)

14 nV/√Hz

Voltage noise density (at 1 Hz in a 50 Ω load)

1.0 μV/√Hz

Gain stability, 500 mVpp into 50 Ω, 15-32 °C ambient

2.3 μV/K = 4.6 ppm/K

Offset stability, into 50 Ω, 15-32 °C ambient

5 μV/K = 1 ppm w.r.t full scale

Binary output markers

4

Advanced sequencer capabilities open up a new realm of possibilities for large-scale qubit control and drastically reduce the time required for calibrations

QCM-RF MODULES OFFER DIRECT MICROWAVE CONTROL OVER A WIDE FREQUENCY RANGE FROM 2-18.5 GHz

  • The QCM-RF combines all the multiplexed sequencing power of the QCM (qubit control module) with two independent internal upconversion stages to directly output signals in the microwave regime. This allows output signals over a wide frequency range from 2 GHz up to 18.5 GHz.

Both output channels have their own completely independent local oscillator, allowing the fully independent operation of each channel. By keeping the digital infrastructure identical to the QCM control module it blends in seamlessly with the Cluster line of modules and its advanced digital infrastructure for synchronized sequencer starts and low-latency data exchange.

With its internal calibration capabilities, it removes the need for any external mixer calibration equipment and inconvenient disconnections from the experiment. Multiplexed signals can span a 750 MHz band without compromising on its state-of-the-art spurious-free dynamic range of >55 dB.

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  • Advanced distributed sequence processing.
  • Multiplexed control of up to 6 qubits per module.
  • Real-time control of amplitude, offset and modulation phase (virtual Z-gates).
  • Synchronized to all other modules with the SYNQ protocol.
  • LINQ allows for low-latency interaction with all other modules.
  • Sequencer instructions allow constructing arbitrarily long (modulated) signals.
  • Integrated calibration protocols for upconversion stages.
  • External instrument triggering via 2 marker outputs.

Cluster Qubit Control Module RF 2-18.5 GHz | Specifications

Frequency range (-3 dB)

2-18.5 GHz

Analog bandwidth (-3 dB)

750 MHz

Analog output channels

2

DAC sample rate

1 GSPS (for I and Q)

DAC resolution

16 bit

Maximum output power (in a 50 Ω load)

+5 dBm

Spurious Free Dynamic Range

>55 dB

Binary output markers

2

Arrange your Control Stack compact and flexible with a mix of modules. Baseband modules offer signals from DC to 300 MHz, RF modules from 2 to 18.5 GHz

QRM READOUT MODULES ARE THE SOLUTION FOR MULTI QUBIT READOUT FROM 0-300 MHz

  • Combining inputs and outputs in one module makes reflectometry/transmission readout schemes ultimately convenient as the readout pulse and acquisition can be triggered from a single instruction.

Arbitrary pulse shapes and arbitrary complex integration functions can be uploaded to suppress crosstalk and optimize measurement efficiency under dynamic readout conditions.

Measurements on up to 6 qubits can be multiplexed, however, their timing is completely independent, allowing arbitrary scheduling of measurement operations.

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  • Advanced distributed sequence processing
  • Multiplexed readout of up to 6 qubits per module
  • Long pulse and integration times can be achieved by dynamically adjusting the sampling rate or by constructing them from offset instructions
  • Real-time modulation with mixer corrections
  • Readout results are uploaded to the Cluster backplane LINQ and shared with all modules within 200 ns
  • External instruments can be controlled from 4 marker outputs

Cluster Qubit Readout Module 0-300 MHz | Specifications

Analog input channels

2

ADC sample rate

1 GSPS

ADC resolution

12 bit

ADC bandwidth (-3 dB)

350 MHz

Input range (in a 50 Ω load)

0.1 to 1 Vpp (controllable)

Analog output channels

2

DAC sample rate

1 GSPS

DAC resolution

12 bit

DAC bandwidth (-3 dB)

350 Mhz

Output range (in a 50 Ω load)

1 vpp

Binary output markers

4

System integration is made easy for both starting and running quantum labs, thanks to our application-agnostic Python and QCoDeS drivers

QRM-RF MODULES OFFER MULTI QUBIT READOUT OVER A WIDE FREQUENCY RANGE FROM 2-18.5 GHz

The QRM-RF combines all the multiplexed sequencing power of the QRM (qubit control module) with internal upconversion stages to directly input and output signals in the microwave regime. This allows output and input signals over a wide frequency range from 2 GHz up to 18.5 GHz.


QRM-RF is made for frequency-multiplexed readout at up to 6 frequencies over a wide band of 750 MHz. By keeping the digital infrastructure identical to the QRM readout module it blends in seamlessly with the Cluster line of modules and its advanced digital infrastructure for synchronized sequencer starts and low-latency data exchange.

With its internal calibration capabilities, it removes the need for any external mixer calibration equipment and inconvenient disconnections from the experiment. Multiplexed signals can span a 750 MHz band without compromising on its state-of-the-art spurious-free dynamic range of >55 dB.

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  • Advanced multiplexed sequencer capabilities following the QRM architecture
  • Synchronized to all other modules with SYNQ
  • The upconversion stages are calibrated without the need for any external calibration devices or protocols
  • 2 binary markers out

Cluster Qubit Readout Module RF 2-18.5 GHz | Specifications

Frequency range (-3 dB)

2-18.5 GHz (input and output)

Analog bandwidth (-3 dB)

750 MHz (input and output)

Analog input channels

1

ADC sample rate

1 GSPS (I and Q)

ADC resolution

12 bit

Analog output channels

1

DAC sample rate

1 GSPS (I and Q)

DAC resolution

12 bit

Maximum output power (in a 50 Ω load)

+5 dBm

Spurious Free Dynamic Range

>55 dB

Binary output markers

2

Qblox SYNQ and LINQ protocols enable all control and readout modules within a Cluster 19' Rack to act as one monolithic system

Qblox presents two unique protocols to ensure deterministic timing (SYNQ) and low-latency feedback with an arbitrary control flow (LINQ). Both protocols contribute to more stable and reliable qubit setups needed for quantum computing.

A quantum program is broken down into distributed subsequences that run in individual module sequence processors.

SYNQ creates a synchronized start to ensure fully deterministic timing of all outgoing signals. The LINQ protocol distributes measurement outcomes to all modules in less than 200 ns to allow low-latency feedback.

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FOR ADDITIONAL INFORMATION OR A PERSONALISED DEMO!

SCALE UP TO 100s OF QUBITS WITH MULTI-CLUSTER CONTROL STACKS

Ready for the next generation of NISQ and fault-tolerance milestones?

The Cluster concepts SYNQ and LINQ are incredibly well-extensible. Inquire more information on how a single setup can control 100s of qubits while maintaining synchronicity and arbitrary control flow with low-latency feedback.

Even extensions with dedicated modules for computationally demanding tasks like real-time error decoding are within reach.