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Universal fine-stru...
Universal fine-structure eraser for quantum dots
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- Fognini, A. (författare)
- Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2628 CJ Delft, Netherlands.
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- Ahmadi, A. (författare)
- Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada.;Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada.
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- Daley, S. J. (författare)
- Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada.;Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada.
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- Reimer, M. E. (författare)
- Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada.;Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada.
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- Zwiller, V (författare)
- KTH,Albanova VinnExcellence Center for Protein Technology, ProNova,Tillämpad fysik,Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2628 CJ Delft, Netherlands.
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Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2628 CJ Delft, Netherlands Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada.;Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada. (creator_code:org_t)
- OPTICAL SOC AMER, 2018
- 2018
- Engelska.
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Ingår i: Optics Express. - : OPTICAL SOC AMER. - 1094-4087. ; 26:19, s. 24487-24496
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- We analyze the degree of entanglement measurable from a quantum dot via the biexciton-exciton cascade as a function of the exciton fine-structure splitting and the detection time resolution. We show that the time-energy uncertainty relation provides means to measure a high entanglement even in presence of a finite fine-structure splitting when a detection system with high temporal resolution is employed. Still, in many applications it would be beneficial if the fine-structure splitting could be compensated to zero. To solve this problem, we propose an all-optical approach with rotating waveplates to erase this fine-structure splitting completely which should allow obtaining a high degree of entanglement with near-unity efficiency. Our optical approach is possible with current technology and is also compatible with any quantum dot showing fine-structure splitting. This bears the advantage that for example the fine-structure splitting of quantum dots in nanowires and micropillars can be directly compensated without the need for further sample processing.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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