Work

How long does it take to obtain a physical density matrix?

Year: 2015

Type: preprint

Abstract: The statistical nature of measurements alone easily causes unphysical estimates in quantum state tomography. We show that multinomial or Poissonian noise results in eigenvalue distributions converging to the Wigner semicircle distribution for already a modest number of qubits. This enables to specify the number of measurements necessary to avoid unphysical solutions as well as a new approach to obtain physical estimates.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.1512.06866

Authors: Knips, Lukas, Schwemmer, Christian, Klein, Nico, Reuter, Jonas, Tóth, Géza, Weinfurter, Harald

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2337899352

Cites:

Cited by: 10

Related to: 10