Deltaflow: The Quantum Error Correction Stack

Unlocking useful quantum computing

Deltaflow helps quantum computers accelerate their path to performance beyond the supercomputing threshold.

Today, the world’s best quantum computers can perform at most a few thousand reliable quantum operations (QuOps) before failure due to mounting data errors.

This must scale to millions of quantum operations (MegaQuOps) and ultimately trillions (TeraQuOps) for quantum computers to fulfil their vast potential.

Riverlane’s Quantum Error Correction (QEC) stack Deltaflow will unlock this opportunity. Deltaflow is a comprehensive QEC solution on a rapid path to utility scale. It includes qubit data readout, decoding, logical operations and orchestration.

Our Deltaflow roadmap will reach a MegaQuOp (a million real-time quantum operations) by 2026. This is the critical milestone when quantum computers reach sufficient scale to execute the first error corrected quantum applications.

DELTAFLOW 2

Next steps towards MegaQuOp computing: Deltaflow 2

Deltaflow 2 performs real-time error correction on up to 250 physical qubits with Riverlane's high-accuracy proprietary Local Clustering Decoder (LCD).

Integrates with any qubit technology and any control system via a common QEC Interface.

Physical qubits: ~250 QuOps: 10,000

Decoding capabilities: Rotated surface code*, Repetition code

QEC capabilities: Streaming quantum memory, quantum stability, leakage aware decoding

*supports the rotated surface code up to distance 11 in real-time.

How Deltaflow works

Deltaflow turns unstable physical qubits into error-free logical qubits. It has three main components working in a continuous cycle to process petabytes of data:

The world’s most powerful decoder. This identifies the errors in this data and sends corrective instructions.

A QEC interface. This processes the qubit readout data from any quantum computer’s control system.

An Orchestration layer. This coordinates and synchronises the complex activities in real time.

Learn more about how the Quantum Error Correction Stack works by watching the accompanying video.

How real-time quantum error correction works

Our Decoder

The world's most powerful quantum error decoder sits at the core of Deltaflow. It optimally balances speed, accuracy and resource requirements.

The decoder gets broken up into many smaller sections. The data from the logical qubits is spread out across these sections and is processed in parallel to keep up with the huge number of qubit errors.

Find out more about our quantum error decoding expertise.

Riverlane's Quantum Error Correction Roadmap

We are building the world's first MegaQuOp scale QEC stack, capable of 1 million reliable quantum operations by the end of 2026.

Partnerships

We partner with the world’s leading quantum computer makers to implement Deltaflow. Our partner process has three steps:

Work together to deeply understand their qubits, hardware, and error properties. We then design the best potential solutions, including the appropriate error correction codes and decoders.
Test and implement QEC solutions offline in software.
Test and implement real-time QEC solutions in hardware.