Entanglement and deterministic quantum computing with one qubit

Michel Boyer, Aharon Brodutch, Tal Mor

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The role of entanglement and quantum correlations in complex physical systems and quantum information processing devices has become a topic of intense study in the past two decades. In this work we present tools for learning about entanglement and quantum correlations in dynamical systems where the quantum states are mixed and the eigenvalue spectrum is highly degenerate. We apply these results to the deterministic quantum computing with one qubit (DQC1) computation model and show that the states generated in a DQC1 circuit have an eigenvalue structure that makes them difficult to entangle, even when they are relatively far from the completely mixed state. Our results strengthen the conjecture that it may be possible to find quantum algorithms that do not generate entanglement and yet still have an exponential advantage over their classical counterparts.

Original languageEnglish
Article number022330
Pages (from-to)022330-1 - 022330-6
Number of pages6
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume95
Issue number2
DOIs
Publication statusPublished - 21 Feb 2017
Externally publishedYes

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