Quantum computers are a new type of computer that use the principles of quantum mechanics to process information. Unlike classical computers, which use bits (0 or 1), quantum computers use qubits, which can be both 0 and 1 simultaneously. This ability, quickly speaking, allows quantum computers to perform many calculations at once, making them incredibly powerful.
How Do Quantum Computers Work?
Superposition: Qubits can exist in multiple states at once. This is like flipping a coin and having it be both heads and tails until you check it.
Entanglement: Qubits can be entangled, meaning the state of one qubit is linked to the state of another, even if they are far apart. This allows quantum computers to solve complex problems more efficiently.
Quantum Gates: Quantum gates manipulate qubits to perform calculations. They are the building blocks of quantum circuits, similar to classical logic gates in traditional computers.
Why Are Quantum Computers Expensive to Build?

Cryogenics: Qubits need to be kept at extremely low temperatures, close to absolute zero, to function properly. This requires advanced and expensive refrigeration systems.

Isolation: Quantum computers must be isolated from external interference, such as vibration and electromagnetic waves, to prevent decoherence, which disrupts qubit states.

Material Science: Creating and maintaining stable qubits involves sophisticated materials and technology, which add to the cost.
The Different Parts of a Quantum Computer
 Qubit Processor: The core component where qubits reside and computations are performed.
 Cryogenic System: Keeps the qubit processor at extremely low temperatures.
 Control Electronics: Manages and controls quantum operations, translating classical commands into quantum instructions.
 Quantum Gates: Perform operations on qubits, forming quantum circuits for computation.
 Error Correction: Ensures accuracy in computations by correcting errors due to the fragile nature of qubits.
The Future of Quantum Computing
Quantum computers have the potential to revolutionize many fields, from cryptography to material science. At QuReady, we specialize in PostQuantum Cryptography (PQC) to help businesses prepare for the future. While quantum computers are still in development, their ability to perform parallel computations opens up new possibilities and challenges in cybersecurity and beyond.
Quantum Risks: QDay and HNDL
As quantum technology advances, we face the impending QDay, when quantum computers will break current encryption methods. Highvalue data with longterm sensitivity (HNDL) is especially at risk. Preparing for these challenges now ensures your data remains secure in the quantum future.