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https://www.ias.ac.in/article/fulltext/pram/056/02-03/0357-0365

Quantum computation; entanglement; DJ algorithm

The existence of entangled quantum states gives extra power to quantum computers over their classical counterparts. Quantum entanglement shows up qualitatively at the level of two qubits. We demonstrate that the one- and the two-bit Deutsch-Jozsa algorithm does not require entanglement and can be mapped onto a classical optical scheme. It is only for three and more input bits that the DJ algorithm requires the implementation of entangling transformations and in these cases it is impossible to implement this algorithm classically.

Arvind¹

1. Department of Physics, Guru Nanak Dev University, Amritsar - 143 005, India

Published

3 February 2001