# quantum processing unit
**Wikidata**: [Q3494561](https://www.wikidata.org/wiki/Q3494561)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Quantum_processing_unit)  
**Source**: https://4ort.xyz/entity/quantum-processing-unit

## Summary
A quantum processing unit (QPU) is a type of processor specifically designed for quantum computing tasks. It is classified as a subclass of the general "processor" category, distinct from traditional central processing units (CPUs). Notable examples of this technology include Microsoft's Majorana 1 chip and Google's Willow processor.

## Key Facts
*   **Classification:** It is an instance of a "processor type" and a subclass of "processor."
*   **Aliases:** Commonly abbreviated as **QPU**; also known linguistically as *وحدة المعالجة الكمومية*.
*   **Google Hardware:** The **Willow** class is a recognized quantum processor (QPU) developed by Google.
*   **Microsoft Hardware:** The **Majorana 1** is a quantum computing chip associated with this category.
*   **IBM Nighthawk Specs:** An existing related processor featuring 120 qubits, 5000 gates, and "error mitigation" technology.
*   **IBM Starling Roadmap:** A planned processor for 2029 aiming for 100 million gates and 200 logical qubits.
*   **IBM Blue Jay Roadmap:** A planned processor projected for 2033 (at the earliest) targeting 1 billion gates and 2000 logical qubits.
*   **Wikipedia Presence:** The entity has a dedicated Wikipedia title "Quantum processing unit" with versions in Arabic, Czech, English, and French.

## FAQs
### Q: What is the difference between a QPU and a CPU?
A: A quantum processing unit (QPU) is a subclass of processor distinct from a central processing unit (CPU). While a CPU is a central computer component that executes standard instructions, a QPU is specialized for quantum computing tasks.

### Q: What are some current examples of quantum processing units?
A: Examples provided in technical databases include Google's Willow processor and Microsoft's Majorana 1 chip. IBM has also developed the Nighthawk processor.

### Q: What are the expected capabilities of future QPUs?
A: Roadmaps indicate significant scaling; for instance, IBM's Starling (planned for 2029) targets 200 logical qubits, while the Blue Jay (planned for 2033) aims for 2,000 logical qubits and 1 billion gates.

## Why It Matters
The quantum processing unit represents the fundamental hardware evolution beyond classical computing limits. While traditional processors handle standard binary logic, QPUs are the core components enabling quantum computation. Their development is critical because they address complex computational problems that are intractable for classical supercomputers. The progression of this hardware is marked by intense industrial competition and distinct roadmaps, such as those from IBM and Google, which define the timeline for achieving quantum utility. For example, the shift from physical qubits to "logical qubits" (referenced in the IBM Starling and Blue Jay specs) indicates the field's maturation toward error-corrected, reliable quantum computing. The existence of specific QPU classes like Willow and Majorana 1 underscores that major technology firms are moving from theoretical research to tangible hardware deployment.

## Notable For
*   **Distinct Taxonomy:** Being specifically classified as a "processor type" and subclass of "processor" rather than a peripheral device.
*   **Rapid Scaling Roadmaps:** The industry trajectory moving from 120-qubit chips (Nighthawk) to planned architectures with 2,000 logical qubits (Blue Jay).
*   **Logical Qubit Development:** Pioneering the shift toward "logical qubits" (targeted in IBM Starling and Blue Jay), which are essential for fault-tolerant computing.
*   **Major Industry Adoption:** Serving as the core technology for flagship chips from industry giants like Google (Willow) and Microsoft (Majorana 1).

## Body

### Classification and Definition
The Quantum Processing Unit (QPU) is formally defined within knowledge structures as a "processor type" and a "subclass of processor." It is an electrical component dedicated to processing data, specifically within the paradigm of quantum mechanics. It is related to, but distinct from, the Central Processing Unit (CPU), which is defined as the central component for executing standard instructions.

### Current Hardware Implementations
Several prominent QPU architectures have been identified:
*   **Willow:** A class of quantum processor developed by Google. It is listed as a distinct "Thing" and "class" within knowledge bases.
*   **Majorana 1:** A quantum computing chip associated with Microsoft.
*   **IBM Nighthawk:** An existing quantum processor featuring 120 qubits and 5000 gates, noted for including "error mitigation" capabilities.

### Future Development Roadmaps
Technical data outlines a specific timeline for the evolution of IBM's QPU technology:
*   **IBM Starling:** Planned for release in 2029. It aims to achieve 100 million gates and utilize 200 logical qubits.
*   **IBM Blue Jay:** Planned for release in 2033 at the earliest. This generation aims for a significant leap in capability, targeting 1 billion gates and 2,000 logical qubits.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Quantum processing unit",
  "description": "A processor type and subclass of processor designed for quantum computing, distinct from a central processing unit.",
  "sameAs": [
    "https://en.wikipedia.org/wiki/Quantum_processing_unit"
  ],
  "alternateName": ["QPU", "وحدة المعالجة الكمومية"],
  "additionalType": "Processor"
}

## References

1. Freebase Data Dumps. 2013