Quantum Computing
One builder learning quantum computing from the ground up, in public. The math, the code, and the unglamorous reality, one verified step after another.
Posts
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10:44 Quantum Computing Relative phase: the invisible engine of quantum
Probabilities cannot see it, the next gate can. Global vs relative phase, and the experiment that makes the invisible visible.
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22:33 Milestones One circuit, two IBM Quantum error codes: 1506 and 1603
20 identical submissions, 11 of one code and 9 of the other. Which one you get decides whether IBM tells you what is wrong.
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13:47 Quantum Computing The tensor product: why 10 qubits means 1024 numbers
One humble operation builds the space that every multi-qubit state lives in, and explains the exponential. Two qubits in, four amplitudes out.
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23:06 Quantum Computing I could not find a place to practise Qiskit, so I built one
Every Qiskit tutorial I found was written for a version that no longer runs. So I built twenty exercises that check your answer by inspecting the objects your code produces.
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00:24 Quantum Computing Entanglement, explained without the spooky
The Bell state in two lines of code, what correlated really means, and why none of it sends messages faster than light.