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Quantum Supremacy

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QUANTUM COMPUTING WALK-THROUGH 

Quantum Computers fundamentally differ from ordinary computers. In normal computers the information in a classical bit is stored as 0 or 1 whereas a quantum bit more precisely a qubit can store 0 or 1 at the same time. Qubits are composed of subatomic particles so they work in coherence with the subatomic logic. Qubits can be 0,1 or a linear combination of 0 and 1.

Quantum computers can perform certain tasks exponentially faster than the classical computers  which is what makes them more intriguing. 

                Efficient Database Searching

Database searching is one such field. In a classical computer to find anything in a database may require testing of every single one of its entries. On the other hand, quantum algorithms are capable of performing the same task in square root of that time. 

      Enhanced Security  Systems with quantum computers


  IT security is another attribute of quantum computers. The banking data and browsing in today's system are kept secure by an encryption system in which you give others a public key to encode message only you can decode, the consequence of this is that this public key can be used to calculate your secret private key. Classical computers will take years of trial and error to do the calculations and fix it. But a quantum computer with exponential speed can probably generate 1 billion possible answers at once to find the correct one in just a fraction of a second.

  Google's demonstration of Quantum Supremacy

                                                                                                                                       

      Emerging Roadblocks to Quantum Computing  


                       Irrespective of having these many pioneering features there are many challenges which can be a roadblock in building these quantum machines. The problem is the more qubits a quantum computer has the more heat system generates. There is high possibility of loosing information when qubits interact with the environment . The colder and more isolated the qubit is the less likely it is to flip to the other state. To avoid calculation errors the quantum computers need to be kept as near as possible to the absolute zero temperature i.e., 0 kelvin. To tackle this situation they are kept in dilution refrigerators. This will be incredibly expensive to keep million of qubits in scaled dilution refrigerators.                                        

      


   

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