Eniac 1950: 30 tons, 150 KW, 1 KB, 100 KHz

      Phone 2018: 5 oz., 1 W, 4 GB, 2 GHz

      QC 2018: tons, KW, 20 Qubit (2²⁰ = 1 Mb), 1 MHz

      QC 2050: ???

Ion Trap Quantum Device

Co-designing a scalable quantum computer with trapped atomic ions, Kenneth R Brown, Jungsang Kim & Christopher Monroe, Nature 2016.
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      One Qubit

Superposition:   α |0> + β |1>

Complex Amplitudes:   α,   β

Probabilities:   |α|²,   |β|²

An Introduction to Quantum Computing, Without the Physics, Giacomo Nannicini, 2017.
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      Single Qubit Operations

Superposition

An Introduction to Quantum Computing, Without the Physics, Giacomo Nannicini, 2017.
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      Two Qubits

Entanglement

An Introduction to Quantum Computing, Without the Physics, Giacomo Nannicini, 2017.