Why in News:
- An experiment carried out by the University of Oxford researchers combined high-precision atomic clocks and quantum entanglement, to achieve two atomic clocks that are “entangled.” This means the inherent uncertainty in measuring their frequencies simultaneously is highly reduced.
- While this is a proof-of-concept experiment, it has the potential for use in probing dark matter, precision geodesy and other such applications
- Atomic clock, a type of clock that uses certain resonance frequencies of atoms (usually cesium or rubidium) to keep time with extreme accuracy.
- Atomic clocks are designed to measure the precise length of a second, the base unit of modern timekeeping.
- The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. This definition refers to a caesium atom at rest at a temperature of 0 Kelvin.
- In an atomic clock, the natural oscillations of atoms act like the pendulum in a grandfather clock. However, atomic clocks are far more precise than conventional clocks because atomic oscillations have a much higher frequency and are much more stable.
- The more mundane uses to which these clocks can be put include accurate time keeping in GPS, or monitoring stuff remotely on Mars.
What is quantum entanglement
- Quantum entanglement is a bizarre, counterintuitive phenomenon that explains how two subatomic particles can be intimately linked to each other even if separated by billions of light-years of space. Despite their vast separation, a change induced in one will affect the other.
- When we look at particles, we usually say that each particle has its own quantum state. Sometimes, two particles can act on one another and become an entangled system. When a pair or group of particles can only be described by the quantum state of the system, and not by individual quantum states, we say the particles are “entangled”.
- Entanglement between particles happens because little particles can push and pull on each other, just like big objects do in terms of gravity.
Read about Quantum cryptography- https://officerspulse.com/quantum-cryptography/
Mains Question: What are some of the recent developments in the field of quantum technologies– https://bit.ly/3qKAt0A
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