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Entropy 2017, 19(12), 653; https://doi.org/10.3390/e19120653

Coherent Processing of a Qubit Using One Squeezed State

Independent Researcher, 35 Bowring Walk, Toronto, ON M3H-5Z8, Canada
Received: 5 October 2017 / Revised: 19 November 2017 / Accepted: 22 November 2017 / Published: 30 November 2017
(This article belongs to the Special Issue Quantum Mechanics: From Foundations to Information Technologies)
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Abstract

In a departure from most work in quantum information utilizing Gaussian states, we use a single such state to represent a qubit and model environmental noise with a class of quadratic dissipative equations. A benefit of this single Gaussian representation is that with one deconvolution, we can eliminate noise. In this deconvolution picture, a basis of squeezed states evolves to another basis of such states. One of the limitations of our approach is that noise is eliminated only at a privileged time. We suggest that this limitation may actually be used advantageously to send information securely: the privileged time is only known to the sender and the receiver, and any intruder accessing the information at any other time encounters noisy data. View Full-Text
Keywords: coherence; qubit; quantum noise; squeezed state coherence; qubit; quantum noise; squeezed state
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Tameshtit, A. Coherent Processing of a Qubit Using One Squeezed State. Entropy 2017, 19, 653.

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