Valley Qubits
Valley qubits are an emerging type of quantum bit that exploit the valley degree of freedom of electrons in certain semiconducting materials, particularly two-dimensional (2D) materials like transition metal dichalcogenides….
Tag: quantum optics
Quantum Noise Reduction in Sensing
Quantum technologies are revolutionizing the way we measure, detect, and sense our physical world. At the heart of this revolution lies the concept of quantum noise reduction, which has enabled….
Quantum Interferometry
1. What Is Interferometry? Interferometry is a technique that involves splitting a wave (like light or sound) into two paths, letting them travel separately, and then recombining them. When the….
Quantum Dots and Nanostructures
1. Introduction to Nanostructures Nanostructures refer to materials and devices engineered at the scale of nanometers—billionths of a meter. At these tiny dimensions, the behavior of matter is governed not….
Weak Measurements
In standard quantum mechanics, measurements are usually described as strong or projective measurements. This means that when you measure a quantum system—say, the spin of an electron or the polarization….
Quantum Non-Demolition Measurements
In classical physics, measuring something doesn’t change it. You can check the temperature of water or the position of a car without disturbing them. But in quantum mechanics, measurement is….
Quantum Feedback Control
Feedback control is a universal concept in both classical and quantum systems. It refers to a process where a system’s current behavior is measured, and those results are used to….
Photonic Quantum Gates
In classical computing, we use logic gates (like AND, OR, NOT) to perform operations on bits. Each gate manipulates bits—values of 0 or 1—based on defined rules. In quantum computing,….
Quantum Metrology with Light
Metrology is the science of measurement. It focuses on how accurately we can measure physical quantities—like time, length, mass, temperature, etc. Quantum metrology, on the other hand, goes beyond the….
Quantum Imaging
Quantum imaging is an advanced technique that uses the unique properties of quantum light to produce images in ways that classical light can’t. It harnesses the quantum behavior of photons,….