Subhash Kak
Articles written in Pramana – Journal of Physics
Volume 40 Issue 1 January 1993 pp 35-42
On training feedforward neural networks
A new algorithm that maps
Volume 54 Issue 5 May 2000 pp 709-713 Research Articles
Quantum key distribution using three basis states
This note presents a method of public key distribution using quantum communication of
Volume 57 Issue 4 October 2001 pp 683-687 Research Articles
Statistical constraints on state preparation for a quantum computer
Quantum computing algorithms require that the quantum register be initially present in a superposition state. To achieve this, we consider the practical problem of creating a coherent superposition state of several qubits. We show that the constraints of quantum statistics require that the entropy of the system be brought down when several independent qubits are assembled together. In particular, we have: (i) not all initial states are realizable as pure states; (ii) the temperature of the system must be reduced. These factors, in addition to decoherence and sensitivity to errors, must be considered in the implementation of quantum computers.
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