Change search
ReferencesLink to record
Permanent link

Direct link
Description of entanglement in terms of quantum phase
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
2002 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 66, no 4Article in journal (Refereed) Published
Abstract [en]

We explore the role played by the phase in an accurate description of the entanglement of bipartite systems. We first present an appropriate polar decomposition that leads to a truly Hermitian operator for the phase of a single qubit. We also examine the positive operator-valued measures that can describe the qubit phase properties. When dealing with two qubits, the relative phase seems to be a natural variable to understand entanglement. In this spirit, we propose a measure of entanglement based on this variable.

Place, publisher, year, edition, pages
2002. Vol. 66, no 4
Keyword [en]
conjugate variables, relative phase, 2 qubits, state, gate, representation, distributions, difference, algorithm, universal
URN: urn:nbn:se:kth:diva-22087DOI: 10.1103/PhysRevA.66.042112ISI: 000179502200022OAI: diva2:340785
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Björk, Gunnar
By organisation
Microelectronics and Information Technology, IMIT
In the same journal
Physical Review A. Atomic, Molecular, and Optical Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 12 hits
ReferencesLink to record
Permanent link

Direct link