Entanglement Detection by Current Measurements in Double Quantum Dot System

• Authors: P. Busz , P. Rożek , D. Tomaszewski , J. Martinek
• Languages of publication: EN

Abstracts

EN

The development of quantum computing in quantum dots systems requires highly efficient and continuous solid-state source of spatially separated spin-entangled electrons. One of the approaches is a use of double quantum dot system connected to superconducting lead, where Cooper pairs provide a source of naturally entangled electrons. Apart from the source, an useful tool for detection of quantum entanglement is needed. We present entanglement detection by the ferromagnetic electrodes using entanglement witness operator method and direct measurement of spin polarized current in the system. We investigate requirements that have to be fulfilled by ferromagnetic detectors.

Keywords

EN

03.67.Mn; 03.67.Bg; 73.23.-b

Discipline

• 03.67.Bg: Entanglement production and manipulation(for entanglement in Bose-Einstein condensates, see 03.75.Gg)
• 03.67.Mn: Entanglement measures, witnesses, and other characterizations(see also 03.65.Ud Entanglement and quantum nonlocality; 42.50.Dv Quantum state engineering and measurements in quantum optics)
• 73.23.-b: Electronic transport in mesoscopic systems

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 490-492

Dates

published

2015-02

Contributors

author

P. Busz

• Institute of Molecular Physics, Polish Academy of Science, 60-179 Poznań, Poland

author

P. Rożek

• Institute of Molecular Physics, Polish Academy of Science, 60-179 Poznań, Poland

author

D. Tomaszewski

• Institute of Molecular Physics, Polish Academy of Science, 60-179 Poznań, Poland

author

J. Martinek

• Institute of Molecular Physics, Polish Academy of Science, 60-179 Poznań, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.127.490