“…As part of the quantum error correction, several redundant physical qubits are required to encode a single Table 1. Four Pillars of Quantum Information Sciences four pillars definitions main attributes application quantum computing exploitation of collective properties of quantum states, such as superposition and entanglement, to perform the computation 10 qubit, quantum computer, quantum algorithm, analog and gate-based quantum computing 11 computations surpassing classical capabilities 12 quantum simulations using a "controllable quantum system to study another less controllable or accessible quantum system"; quantum simulation could be implemented with analog devices that would be easier to construct than quantum computers 13 programmable physical many-body quantum system such as spin-based system, quantum simulator quantum chemistry problems, quantum many-body problems, superconductivity, spin liquid in polar molecules, quantum walks in superconducting qubits 14 quantum sensing use of a quantum system, quantum properties, or quantum phenomena (coherence, entanglement) to perform a measurement of a physical quantity 15,16 exploitation of quantum attributes of the coherent or entangled state sensing beyond classical limits, atom interferometer, atom magnetometer, Rydberg atoms, atomic clocks, atom interferometer 11 quantum networking transmitting information with the help of "entangled" particleswhose quantum state cannot be described independently, even when they are separated by a large distance 17 logical qubit. The interconnect that addresses each qubit residing at 10 mK passes through a cryogenic dilution temperature of 4.2 mK followed by different levels all the way to ambient temperature.…”