Quantum Noise is signal disturbance developed through statistical nature of creation and collection of photoelectrons Quantum noise refers to the random fluctuations that arise from the quantum nature of particles and fields. This noise is inherent in all quantum systems and originates from the fundamental principles of quantum mechanics. ### Key Points: 1. **Origin**: - Quantum noise arises due to quantum fluctuations, which are the temporary changes in the amount of energy in a point in space, as permitted by the [[Heisenberg Uncertainty Principle]] [[1](https://en.wikipedia.org/wiki/Quantum_noise)][[4](https://www.rp-photonics.com/quantum_noise.html)]. 2. **Types**: - **Shot Noise**: This type of noise occurs because of the discrete nature of electric charge and photons. It is prominent in photonic and electronic systems where individual particles are detected [[5](https://www.sciencedirect.com/topics/chemistry/quantum-noise)]. - **Quantum Mottle**: In radiography, quantum noise is referred to as quantum mottle, which affects the quality of radiographic images [[2](https://radiopaedia.org/articles/quantum-noise?lang=gb)][[6](https://www.quora.com/What-is-the-theory-of-quantum-noise)]. 3. **Impact on Technology**: - In laser technology, quantum noise can limit the precision and performance of lasers [[4](https://www.rp-photonics.com/quantum_noise.html)]. - In quantum computing, quantum noise causes errors in quantum computations and is a significant challenge to building reliable quantum computers [[3](https://www.quera.com/glossary/noise)]. 4. **Significance**: - Quantum noise is a fundamental aspect that differentiates quantum systems from classical systems. Unlike classical noise, which can often be mitigated or eliminated, quantum noise is intrinsic and must be managed through advanced techniques and error correction methods in various applications.