Witnessing pairing correlations in identical-particle systems

Date

2021-12-01

Author

Aksak, Cagan
Turgut, Sadi

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

258
views

0
downloads

Quantum correlations and entanglement in identical-particle systems have been a puz-zling question which has attracted vast interest and widely different approaches. Witness formalism developed first for entanglement measurement can be adopted to other kind of correlations. An approach is introduced by Kraus et al., [Phys. Rev. A 79, 012306 (2009)] based on pairing correlations in fermionic systems and the use of witness formalism to detect pairing. In this contribution, a two-particle-annihilation operator is used for constructing a two-particle observable as a candidate witness for pairing correlations of both fermionic and bosonic systems. The corresponding separability bounds are also obtained. Two different types of separability definition are introduced for bosonic systems and the separability bounds associated with each type are discussed.

Subject Keywords

Entanglement, Pairing, Quantum correlations

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121293042&origin=inward
https://hdl.handle.net/11511/95129

Journal

Quantum Information and Computation

DOI

https://doi.org/10.26421/qic21.15-16-4

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Quantum Information Approach to Correlations in Many-body Systems Aksak, Çağan; Turgut, Sadi; Department of Physics (2022-9-21) Quantum correlations are crucial features in both quantum information theory and many-body physics. Characterization and quantification of quantum correlations have delivered a rich body of work and helped to understand some quantum phenomena. Entanglement is a unique quantum correlation for which it is a resource in many quantum information tasks. Developed for quantification of entanglement, entanglement witness formalism is a remarkable tool in the quantum information toolkit. It can be deployed beyond t...
Steady-state bipartite entanglement supported by a squeezed environment Can, MA; Akir, O; Gunhan, AC; Klyachko, AA; Pak, Namık Kemal; Shumovsky, AS (2005-05-01) We examine the entanglement of two atoms induced by an external quantum system. Both two-level atoms are coupled to a third two-level system by dipole interaction, and the third system is under the influence of a certain environment. We examine different types of environments and show that the steady-state bipartite entanglement can be achieved. We show that a strongly fluctuating environment is more preferable because the transmission of quantum fluctuations to the atomic system creates and supports steady...
Quantum systems and representation theorem Dosi, Anar (2013-09-01) In this paper we investigate quantum systems which are locally convex versions of abstract operator systems. Our approach is based on the duality theory for unital quantum cones. We prove the unital bipolar theorem and provide a representation theorem for a quantum system being represented as a quantum -system.
Effective gauge theories from fuzzy extra dimensions Ünal, Gönül; Kürkcüoğlu, Seçkin; Department of Physics (2016) In this thesis, we investigate the formulation and various aspects of gauge theories with fuzzy extra dimensions. In SU (N ) gauge theories coupled to a suitable number of adjoint scalar fields, we determine a family of fuzzy vacuum configurations dynamically emerging after the spontaneously symmetry breaking of the gauge symmetry. The emergent models are conjectured to be effective U (n) (n < N ) gauge theories with fuzzy extra dimensions. Making use of the equivariant parametrization technique and focusin...
Vacuum decay and the transmission resonances in space-dependent electric fields Dumlu, Cesim K. (2014-03-11) We investigate the decay of a quantum electrodynamical (QED) vacuum in arbitrary space-dependent electric fields. In particular, we analyze the resonance peaks of the positron emission spectrum for the external fields with subcycle structure. For this, we study the transmission probability in the framework of the scattering approach to vacuum pair production. In an under-the-barrier scattering regime, we show that the width of a transmission resonance can be enhanced when the effective scattering potential ...

Citation Formats

C. Aksak and S. Turgut, “Witnessing pairing correlations in identical-particle systems,” Quantum Information and Computation, vol. 21, no. 15-16, pp. 1307–1319, 2021, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121293042&origin=inward.