T2 Coherence Time
BeginnerT2 Coherence Time is the maximum time a qubit can maintain its phase relationship in a superposition state before it's lost to environmental noise.
In Plain English
Imagine two spinning tops synchronized perfectly. T2 time is how long they can stay in sync before tiny air currents cause one to get slightly ahead or behind the other. This loss of their relative timing, or 'phase', is what T2 measures and is critical for quantum computations.
Why It Matters for Your Career
Quantum Hardware Engineers and Qubit Scientists at companies like Rigetti, IonQ, and Intel work to maximize T2 times, a key performance metric. In interviews for hardware roles, you'll be expected to understand the physical factors that limit T2 and how to engineer better qubits.
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