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The power of a quantum computer
A conventional computer uses electricity within its silicon chips. Small amounts of electrical current are turned on or off. It represents true and false, or the binary numbers one and zero.
But a quantum computer changes individual quantum elements such as electrons or photons, called qubits. Due to their 'spin', electrons can be up or down, and photons vertical or horizontal at the same time. This quantum superposition means that a qubit is in both states at once.
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Entangled property of qubits
Qubits rely on a property known as entanglement - the property of one particle is entangled with another.
When there are two entangled particles with a combined spin of zero and one particle collapses so that it spins clockwise, the other particle's state will be anticlockwise. This means, once entangled, qubits can be used to represent massive numbers. For example, Google's quantum computer Sycamore had 53 qubits, meaning it could represent over ten quadrillion combinations simultaneously.
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Quantum computers are fragile
Quantum computers need delicate storage requirements. If a qubit interacts with an external factor such as a vibration or temperature variation, it can cause them to fall out of superposition before their job has been done.
To prevent this, scientists try to preserve these superposition states of qubits in vacuum chambers and very cold spaces.
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What is a quantum computer?
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