April 30, 2024

QuiX Quantum Technology Unlocks Key to Scaling Photonic Quantum Computing

Researchers using QuiX Quantum's technology have successfully demonstrated the on-chip generation of Greenberger-Horne-Zeilinger (GHZ) states, a critical component for the advancement of photonic quantum computing. This breakthrough establishes QuiX Quantum’s integrated technology as the leading platform for photonic quantum computing, and further validates QuiX Quantum’s roadmap to deliver a scalable universal quantum computer. 

A GHZ state involves entanglement across three photonic qubits, serving as the essential unit for building a more complex entangled structure called a resource state. Without the initial GHZ state, constructing this larger structure and performing computations would be impossible. The ability to produce and maintain GHZ states, enabled by QuiX Quantum's technology, is critical for scaling quantum computers. This development is celebrated as a major milestone in photonic quantum computing since the demonstration of a quantum advantage.

The creation of GHZ states is necessary for photonic quantum computers, which carry information at light speed. In a matter-based quantum computer, qubits are stationary, typically positioned on a specialized chip. In contrast, a photonic quantum computer uses flying qubits of light to process and transmit information. This information travels at the speed of light and is constantly passed from one state to another through a process called quantum teleportation. The GHZ states are the crucial resource enabling the computer to maintain this information.  

This achievement heralds a new era in photonic quantum computing. Research has confirmed that QuiX Quantum’s integrated photonics technology is instrumental in developing universal, utility-scale quantum computers. Distinguished by its ability to operate at room temperature, along with minimal losses and complete programmability, this technology has been commercially available since its 2022 launch. QuiX Quantum's proven technology paves the way for transitioning from experimental to practical applications. This result sends a powerful message: the age of practical, scalable quantum computing is on the horizon, and QuiX Quantum’s technology is the pathway.


Dr.-Ing. Stefan Hengesbach, CEO of QuiX Quantum, says, "The creation of GHZ states on our hardware is a pivotal milestone for the entire photonic quantum computing industry, signifying a crucial validation towards achieving a scalable universal quantum computer with flying qubits. This milestone demonstrates the capability of photonic quantum computers to generate multi-photon entanglement in a way that advances the roadmap toward large-scale quantum computation. The generation of GHZ states is evidence of the transformative potential of QuiX Quantum’s photonic quantum computing technology.

Chief Scientist of QuiX Quantum and contributing author of the research paper, Dr. Jelmer Renema, commented, "I am thrilled to witness QuiX Quantum’s technology potential being transformed into such conclusive validation. This is a critical step needed in creating scalable photonic quantum computers. The next challenge is now making many of these devices. When comparing one GHZ state to a million GHZ states, think of it as the spark needed to create a blazing fire. The more GHZ states a photonic quantum computer contains, the more powerful it becomes.”

About QuiX Quantum: QuiX Quantum is the European market leader for quantum computing hardware based on photonics. They are building the first universal photonic quantum computer in Europe, with the first sale to the German Aerospace Center (DLR). The core technology for their universal quantum computers is award-winning and commercially available. QuiX Quantum has 4 offices in Europe and customers worldwide.


Link to Published Article: https://doi.org/10.1103/PhysRevLett.132.130603