# Atomic Clock

**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 clocks**

**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

#### References:

Subscribe

Login

0 Comments