In a significant advance for quantum technology, researchers have developed a silicon-based quantum processor capable of executing a full range of logical operations while actively detecting errors. The breakthrough marks an important step toward building reliable, scalable quantum computers.

A team from the Shenzhen International Quantum Academy has demonstrated that silicon—long the backbone of modern electronics—can now support complex quantum operations previously achieved mainly in superconducting systems. Their processor not only manipulates quantum information but also monitors it for errors in real time, addressing one of the biggest challenges in quantum computing.

Figure 1. Quantum Processor.

Quantum systems are notoriously fragile. Even minor environmental disturbances can introduce noise, leading to calculation errors. To tackle this, scientists encode information into “logical qubits,” which are designed to identify and manage such errors. The new silicon chip successfully implements this concept, showing that fault-tolerant quantum computing may be within reach using existing semiconductor materials.

From Individual Qubits to Functional Logic

The processor was built by precisely embedding phosphorus atoms into silicon, enabling fine control over individual qubits. The researchers also introduced techniques to minimize signal interference—one of the primary sources of quantum errors. Figure 1 shows quantum processor.

Using just four physical qubits, the team created two logical qubits capable of detecting errors during operations. This setup allowed the system to identify unwanted disturbances as computations progressed, ensuring more reliable results.

Importantly, the study demonstrated a complete operational workflow: preparing error-protected quantum states, performing logical operations, and applying them within an algorithm. This end-to-end capability represents a key milestone in quantum system design.

To validate their approach, the researchers ran a quantum simulation to determine the lowest-energy state of a water molecule. The results closely aligned with theoretical predictions, highlighting the processor’s ability to handle meaningful computational tasks.

Toward Real-World Quantum Applications

The team employed the Variational Quantum Eigensolver, a widely used quantum algorithm, to carry out the molecular simulation [1]. The small deviation from expected values suggests that silicon-based quantum systems are becoming increasingly practical for real-world applications.

Beyond demonstrating technical feasibility, the work shows that silicon platforms can evolve from controlling a handful of qubits to executing coordinated, error-aware computations. This capability is essential for scaling up quantum machines.

Silicon’s compatibility with existing semiconductor manufacturing techniques further strengthens its position as a leading candidate for future quantum hardware. With this breakthrough, researchers have taken a decisive step toward integrating quantum computing into the technological mainstream.

Reference:

1. https://interestingengineering.com/science/silicon-quantum-chip-logical-operations

Cite this article:

Keerthana S (2026), Silicon-Based Quantum Processor Achieves Full Logical Functionality, AnaTechMaz, pp.485