Unified Approach to Universal Cloning and Phase-Covariant Cloning
Jia-Zhong Hu, Zong-Wen Yu, Xiang-Bin Wang
TL;DR
This paper introduces a unified analytical approach to approximate quantum cloning that encompasses both universal cloning and phase-covariant cloning, applicable to states between two latitudes on the Bloch sphere.
Contribution
The paper provides an analytical formula for optimized 1-to-2 quantum cloning that unifies different cloning strategies.
Findings
Unified cloning formula for states between two latitudes.
Analytical solution for optimized 1-to-2 cloning.
Bridges universal and phase-covariant cloning methods.
Abstract
We analyze the problem of approximate quantum cloning when the quantum state is between two latitudes on the Bloch's sphere. We present an analytical formula for the optimized 1-to-2 cloning. The formula unifies the universal quantum cloning (UQCM) and the phase covariant quantum cloning.
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Taxonomy
TopicsQuantum Computing Algorithms and Architecture · Quantum Information and Cryptography