Correct Answer:
B. When a quantum computer solves problems impossible for classical computers.
The correct answer is B: When a quantum computer solves problems impossible for classical computers. Quantum supremacy is a term used in quantum computing to describe the point at which a quantum computer performs a computational task that is practically impossible for even the fastest classical supercomputers to complete within a reasonable timeframe. This achievement demonstrates that quantum computers can indeed solve certain problems significantly faster than classical machines, marking a crucial milestone in the development of quantum technology. It's not about solving *any* problem better, but rather a specific class of problems designed to highlight the quantum advantage.
- Option A: When a computer achieves zero energy loss is incorrect. Achieving zero energy loss is an ideal state related to energy efficiency and thermodynamics, not directly to the computational capability comparison between quantum and classical computers that defines quantum supremacy.
- Option C: When a network is fully secure from hacking is incorrect. Network security relates to protecting information and systems from unauthorized access, use, disclosure, disruption, modification, or destruction. Quantum supremacy has no direct bearing on current network security levels, although quantum computing research does explore quantum-resistant cryptography.
- Option D: The mass production of microchips is incorrect. The mass production of microchips refers to the manufacturing scale and efficiency of semiconductor fabrication. This is a topic in electronics manufacturing and has no relation to the unique computational power demonstrated by quantum supremacy.