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Quantum Simulation

Operational effects of the UNOT gate on classical and quantum correlations

arXiv
Authors: Kuan Zhang, Jiajun Ma, Xiang Zhang, Jayne Thompson, Vlatko Vedral, Kihwan Kim, Mile Gu

Year

2017

Paper ID

25118

Status

Preprint

Abstract Read

~2 min

Abstract Words

104

Citations

N/A

Abstract

The NOT gate that flips a classical bit is ubiquitous in classical information processing. However its quantum analogue, the universal NOT (UNOT) gate that flips a quantum spin in any alignment into its antipodal counterpart is strictly forbidden. Here we explore the connection between this discrepancy and how UNOT gates affect classical and quantum correlations. We show that while a UNOT gate always preserves classical correlations between two spins, it can non-locally increase or decrease their shared discord in ways that allow violation of the data processing inequality. We experimentally illustrate this using a multi-level trapped \Yb ion that allows simulation of anti-unitary operations.

Why This Paper Matters

  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
  • It adds a 2017 reference point for readers tracking recent quantum research.
  • The NOT gate that flips a classical bit is ubiquitous in classical information processing.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1711.04937 [2] arXiv https://arxiv.org/abs/1711.04937 [3] Publisher https://arxiv.org/abs/1711.04937

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