27 February 2024 : PIB Summary for UPSC
PIB Summary for UPSC
27 February -2024
1. International collaboration of physicists achieves first successful laser cooled Positronium, a short-lived atom significant for quantum studies
| Topic: GS3 – Science and Technology The laser cooling of Positronium at CERN is crucial for understanding quantum physics, relevant for UPSC science and technology syllabus. |
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Additional information on this news:
- Breakthrough in Laser Cooling: The AEgIS collaboration, involving researchers from 19 European groups and one Indian group, has achieved the laser cooling of Positronium, a short-lived hydrogen-like atom. This marks a significant breakthrough in the field of quantum electrodynamics.
- Experimental Setting: The complex experiments were conducted at CERN, the European Organization for Nuclear Research, involving the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) collaboration.
- Unique Composition: Positronium is a fundamental atom comprising an electron and a positron, both leptons, without the presence of usual nuclear matter. This makes it a purely leptonic atom and an ideal testing ground for bound-state quantum electrodynamics.
- Indian Contribution: Sadiq Rangwala, a Professor at the Raman Research Institute in India, played a key role in the AEgIS collaboration. He led the Indian effort, contributing to the design of diagnostics for laser beam alignment at the CERN accelerator.
- Technological Challenges: Laser cooling of Positronium required cutting-edge lasers and technological innovations. The experiment involved overcoming challenges related to ultraviolet and infrared frequency lasers in the CERN accelerator beam hall.
- Temperature Reduction: The laser cooling successfully reduced the temperature of Positronium atoms from ~380 Kelvin to ~170 Kelvin, opening avenues for advanced studies and improved understanding of the interaction between light and charged matter.
- Future Implications: The breakthrough paves the way for further studies, including the formation of exotic many-particle systems like Bose Einstein Condensates, and contributes to the AEgIS experiment’s goal of testing the equivalence principle in anti-Hydrogen.
| Importance of Quantum Studies |
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| PYQ: Which one of the following is the context in which the term “qubit” is mentioned? (2022) (a) Cloud Services (b) Quantum Computing (c) Visible Light Communication Technologies (d) Wireless Communication Technologies Ans: (b) |
| Practice Question: Discuss the significance of the recent breakthrough in laser cooling of Positronium at CERN and its implications for quantum physics. (150 words/10 m) |
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