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CLUSTER CONTROL STACKS, DEDICATED AND SYNCHRONISED MODULAR CONTROL

Qblox Cluster is the scalable 19" rack sytem which can be configured with a combination of qubit readout and control modules. These act as one solid system through the use of our proprietary SYNQ and LINQ backplane system protocols.

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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  • Hosting up to 20 modules/Cluster in a 4U chassis
  • SYNQ starts modules synchronously <<1 ns
  • LINQ distributes measurement outcomes in <200 ns
  • Ready for surface-code QEC with real-time decoding
  • Up to 80 channels + 80 marker outputs in 4U

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

THE CLUSTER SERIES QCM MODULE IS IDEAL FOR MULTI-QUBIT CONTROL

  • 4 analog output channels
  • 1 GSPS
  • 16 bit resolution
  • 5 Vpp output (50 Ω)
  • Ultralow noise and distortion
  • 4 binary markers out

A single Qubit Control Module (QCM) hosts 8 sequence processors for flexible multiplexed driving and tracking of up to 8 qubits (or other oscillators). This flexible approach is supported by our SYNQ and LINQ system for fully synchronous operation.

Advanced sequencer capabilities drastically speed up characterization 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, 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.

Qubit control on demand

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  • Advanced distributed sequence processing
  • Multiplexed control of up to 8 qubits
  • Base-band operation or IQ-mode for single-sideband upconversion
  • Real-time modulation and mixer corrections
  • Real-time control: amplitude, offset, modulation frequency, modulation phase (virtual Z-gates)
  • Offset instructions allows constructing arbitrarily long (modulated) signals
  • The QCM can act on all readout results from QRMs via the Cluster backplane LINQ with an arbitrary control flow and low latency
  • External instrument control by 4 marker outputs
Advanced sequence capabilities open up a new realm of possibilitites for large scale qubit control and drastically reduce the time required for calibration

THE CLUSTER SERIES QRM MODULE IS IDEAL FOR MULTI-QUBIT READOUT

  • 2 analog input channels
  • Variable 0.1 to 1 Vpp (50 Ω)
  • 2 analog output channels
  • 1 Vpp output (50 Ω)
  • 1 GSPS / 12 bit
  • 4 binary markers out

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

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

Measurements on individual qubits can be multiplexed, but still their timing is completely independent, allowing an arbitrary scheduling of measurement operations.

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  • Advanced distributed sequence processing
  • Multiplexed readout of up to 8 qubits per module
  • Long pulse and integration times can be achieved by dynamically adjusting the sampling rate or by construcing 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 its 4 marker outputs
Integration with running quantum computing systems is made easy. Our supporting platform provide Python, QCoDeS and several higher-level interfaces for easy integration

SCALE UP TO 100s OF QUBITS WITH SUPER CLUSTER CONTROL STACKS

Ready for the next generation of quantum supremacy 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 extentions with dedicated modules for computationally demanding tasks like real-time error decoding are within reach.

Cluster QCM Specifications

DAC channels

4

DAC sample rate

1 GSPS

DAC resolution

16 bit

Analog bandwidth (-3 dB)

300 MHz

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

<50 ppm (18 to 24 °C)

Cluster QRM Specifications

ADC channels

2

ADC sample rate

1 GSPS

ADC resolution

12 bit

ADC bandwidth (-3 dB)

300 MHz

Input range (in a 50 Ω load)

0.1 to 1 Vpp (controllable)

DAC channels

2

DAC sample rate

1 GSPS

DAC resolution

12 bit

DAC bandwidth (-3 dB)

300 Mhz

Output range (in a 50 Ω load)

1 vpp

Contact us for additional information!