Superconducting Qubits
Master the leading quantum computing technology powering IBM, Google, and Rigetti
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Quantum Hardware Overview
Introduction to Superconducting Qubits
Superconducting qubits are artificial atoms created from superconducting circuits operating at near absolute zero. They power the quantum computers built by IBM, Google, and Rigetti—representing the most mature quantum computing platform today.
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Qubits (IBM)
~100 μs
Coherence
20 mK
Temperature
Why Superconducting?
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Fast Operations
Gate times in nanoseconds
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Engineerable
Tunable circuit design
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Scalable Fabrication
Semiconductor manufacturing
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Strong Coupling
Easy multi-qubit gates
Key Concepts
Josephson Junction
Two superconductors separated by thin insulator—creates nonlinear inductance
Cooper Pairs
Paired electrons that tunnel through barrier quantum mechanically
Dilution Refrigerator
Cools qubits to ~20 mK for superconducting operation
Transmon
Most popular design with long coherence times and low charge noise