Quantum information capsule and information delocalization by entanglement in multiple-qubit systems

Koji Yamaguchi, Naoki Watamura, Masahiro Hotta

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Where do entangled multiple-qubit systems store information? For information injected into a qubit, this question is nontrivial and interesting since the entanglement delocalizes the information. So far, a common picture is that of a qubit and its purification partner sharing the information quantum mechanically. Here, we introduce a new picture of a single qubit in the correlation space, referred to as quantum information capsule (QIC), confining the information perfectly. This picture is applicable for the entangled multiple-qubit system in an arbitrary state. Unlike the partner picture, in the QIC picture, by swapping the single-body state, leaving other subsystems untouched, the whole information can be retrieved out of the system. After the swapping process, no information remains in the system.

Original languageEnglish
Pages (from-to)1255-1259
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume383
Issue number12
DOIs
Publication statusPublished - 2019 Apr 10

Keywords

  • Black hole information loss problem
  • Quantum entanglement
  • Quantum information
  • Quantum memory

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Quantum information capsule and information delocalization by entanglement in multiple-qubit systems'. Together they form a unique fingerprint.

Cite this