DoE seeking fault-tolerant quantum computer ... by 2028

DoE’s illustrative benchmark for the prototype calls for at least 10 logical qubits (quantum bits) capable of performing 10³ hard operations.

For the first-generation SRQC, DoE’s illustrative benchmark rises to at least 100 logical qubits capable of performing 10⁵ hard operations with fault tolerance.

Logical qubits are a solution to the tendency for quantum computers to be quite error prone because qubits are incredibly fragile.

Logical qubits are supposed to solve those problems by grouping a bunch of physical qubits into a single system that can correct for errors.

QuEra also plans to introduce its Libra system by 2028 with more than 256 logical qubits and a logical error rate of 10⁻⁶.