Quantum Information Disturbance Trade-off
In classical physics, if you want to know about a system—like measuring a car’s speed or temperature—you can simply observe it. The act of measuring doesn’t significantly affect the car….
Tag: quantum information
Quantum Entropy Measures
In classical information theory, entropy is used to measure uncertainty or the average information content of a message. This idea is extended in the quantum world through quantum entropy measures,….
Quantum Dense Coding
In the classical world, sending a message with two bits of information requires two bits of data to be transmitted. Quantum Dense Coding flips this logic on its head. It….
Entanglement Swapping
Before diving into entanglement swapping, it’s important to understand quantum entanglement. Entanglement is a unique quantum phenomenon where two or more particles become connected in such a way that the….
Quantum Oblivious Transfer
Quantum Oblivious Transfer (QOT) is a powerful cryptographic protocol rooted in quantum mechanics. It allows a sender (let’s say Alice) to send information to a receiver (Bob) in a special….
Spin Qubits
Spin qubits are a type of quantum bit (qubit) where information is stored in the quantum property known as “spin” of particles such as electrons or atomic nuclei. In the….
Photonic Quantum Computing
Photonic quantum computing uses particles of light, known as photons, to carry and process quantum information. Instead of using physical matter like electrons or ions, it harnesses the unique quantum….
Qubits and Quantum States
In classical computing, we rely on bits — tiny switches that are either off (0) or on (1). Every digital device you use operates using billions of these bits. But….