Question 96 from UPSC CSE 2022 - S&T

Question

Which one of the following is the context in which the term 'qubit' is mentioned?

IASCODEX · Accepted Answer

Correct Option: B. Quantum Computing

Strategy: - Identify 'qubit' as the unique and key term.
- Discard options like cloud, wireless, or visible light, which do not utilize 'qubits'.
- Connect 'qubit' to its specific domain, quantum computing, for the correct solution.

Key Info: **What is a Qubit?**
A qubit, or quantum bit, is the fundamental unit of quantum information used in quantum computing. Unlike classical bits (which are 0 or 1), a qubit can exist in a superposition of both states due to quantum mechanical phenomena. This property allows quantum computers to process information in fundamentally new ways, leading to exponential speed-ups for certain computational problems.

**Quantum Computing Principles and Applications**
Quantum computers exploit entanglement and superposition, enabling parallel processing not possible with classical systems. This is a rapidly advancing field with significant implications in areas such as:
-   Cryptography
-   Material science
-   Drug discovery
-   Optimization

Qubits can be formed from trapped ions, superconducting circuits, photons, or other quantum systems. Importantly, classical technologies like cloud services, visible light communication, and standard wireless do not use qubits.

IASCODEX · Answer

Option A: Cloud Services

IASCODEX · Answer

Option C: Visible Light Communication Technologies

IASCODEX · Answer

Option D: Wireless Communication Technologies