Quantum computing and classical computing differ fundamentally in their principles and capabilities. Quantum computing leverages quantum mechanics, using qubits that can exist in multiple states simultaneously, while classical computing relies on bits that are either 0 or 1. Quantum computers promise exponential speed and power, but face significant challenges like noise and environmental sensitivity.
Quantum vs Classical
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Quantum and classical computing are like night and day.
Quantum computing and classical computing are fundamentally different in their approach to processing information. **Classical computers** use bits, which are binary and can only be in a state of 0 or 1, [making them sequential in nature](https://quantumzeitgeist.com/quantum-computing-vs-classical-computing-key-differences/). In contrast, **quantum computers** use qubits, which can be in a state of 0, 1, [or both simultaneously due to the principle of *superposition*](https://www.geeksforgeeks.org/conventional-computing-vs-quantum-computing/). This allows quantum computers to perform multiple calculations at once, [offering a potential for exponential speed and power](http://eitc.org/research-opportunities/high-performance-and-quantum-computing/classical-vs-quantum-computing).
Superposition Magic
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Entanglement Wonders
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Noise Challenges
One of the biggest challenges facing quantum computing is noise. Quantum systems are extremely sensitive to their environment, and even the slightest disturbance can cause errors in calculations. This sensitivity means that quantum computers often need to operate in tightly controlled environments, sometimes at temperatures close to absolute zero. Managing and mitigating noise is crucial for the development of practical quantum computers that can outperform classical systems.
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