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New technique to measure the Detection of spin coherence in cold atoms

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Long-lived correlations between waves at extremely low temperatures in atomic systems can be exploited for effective quantum computing.

  • Indian scientists have devised a technique to measure the spin properties of atoms cooled to micro-Kelvin temperatures by a non-destructive method. Earlier techniques to measure these properties were destructive and disrupted the atomic sample during measurement.
  • Spin is a fundamental quantum characteristic of atoms and elementary particles such as electrons and protons. As atoms are cooled to extremely low temperatures, their spin coherences are maintained for a long time. Therefore, this situation is preferable for quantum computers.
  • Quantum computing focuses on developing computer technology based on the principles of quantum theory. It explains the nature and behavior of energy and matter at the quantum (atomic and subatomic) level.
  • Under traditional computers, information is stored using bits representing 0 or 1. In contrast, quantum computers use quantum bits or Qubits to encode or encode information as 0, 1 or both at the same time.

They work according to two major principles of quantum physics: superposition and entanglement.

  • Superposition: This means that each qubit can represent both 1 and 0 at the same time.
  • Entanglement: This means that qubits in superposition can be correlated with each other, i.e. the position of one (whether it is 1 or 0) can depend on the position of the other.

Source – The Hindu

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