New Test with Quantum Coins & Computers for Quantum Sensing

• 06 Mar 2020

Why in News

• Researchers from the Raman Research Institute (RRI) (autonomous institution under the Department of Science & Technology) have devised a new test for fairness of quantum coin or qubit using entanglement theory.

Key Points

• The test uses entanglement to test the fairness of the quantum coin. Their strategy enables better discrimination between quantum states. Such an advantage is valuable in quantum sensors
• This is a significant contribution to quantum state discrimination and an essential aspect of quantum information science which is expected to influence quantum sensing.

Quantum Information and Quantum Computing Technology

• The domain of Quantum Information and Quantum Computing Technology is a growing area of research which is expected to influence Data Processing, which in turn, plays a central role in our lives in this Information Age.
• For instance, bank transactions, online shopping and so on crucially depend on the efficiency of information transfer.
• Thus the work on quantum state discrimination is expected to be valuable in people’s lives in the current era.

Qubit

• A quantum bit, or qubit, is the basic unit of information for a quantum computer, analogous to a bit in ordinary machines.
• But unlike a bit, which can have the value 0 or 1, a qubit can take on an infinite number of values.

Quantum computer

• A quantum computer is any device for computation that makes direct use of distinctively quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data.
• Superposition means that each qubit can represent both a ‘1’ and a ‘0’ at the same time
• Quantum entanglement occurs when two particles become inextricably linked, and whatever happens to one immediately affects the other, regardless of how far apart they are.
  
  • Entanglement is a special type of correlation that exists in the quantum world with no classical counterpart.

Source: PIB