Toward tripartite hybrid entanglement in quantum dot molecules
Establishing the hybrid entanglement among a growing amount of matter and photonic quantum bits is necessary for scalable quantum computation and long-distance quantum communication. Here we demonstrate that charged excitonic complexes forming in strongly correlated quantum dot molecules are able to...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/16/2/023019 |
| _version_ | 1827874261624160256 |
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| author | M Khoshnegar A Jafari-Salim M H Ansari A H Majedi |
| author_facet | M Khoshnegar A Jafari-Salim M H Ansari A H Majedi |
| author_sort | M Khoshnegar |
| collection | DOAJ |
| description | Establishing the hybrid entanglement among a growing amount of matter and photonic quantum bits is necessary for scalable quantum computation and long-distance quantum communication. Here we demonstrate that charged excitonic complexes forming in strongly correlated quantum dot molecules are able to generate tripartite hybrid entanglement under proper carrier quantization. The mixed orbitals of the molecule construct multi-level ground states with sub-meV hole tunneling energy and relatively large electron hybridization energy. We show that appropriate size and interdot spacing keeps the electron particle weakly localized, opening extra recombination channels by correlating ground-state excitons. This allows for creation of higher order entangled states. Nontrivial hole tunneling energy, renormalized by multi-particle interactions, facilitates the realization of the energy coincidence among only certain components of the molecule optical spectrum. This translates to the emergence of favorable spectral components in a multi-body excitonic complex which sustain principal oscillator strengths throughout the electric field-induced hole tunneling process. We particularly analyze whether the level broadening of favorable spin configurations could be manipulated to eliminate the distinguishability of photons. |
| first_indexed | 2024-03-12T16:49:44Z |
| format | Article |
| id | doaj.art-8c3fdec165cc4636ba77a1a5df22c46f |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:49:44Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8c3fdec165cc4636ba77a1a5df22c46f2023-08-08T11:23:35ZengIOP PublishingNew Journal of Physics1367-26302014-01-0116202301910.1088/1367-2630/16/2/023019Toward tripartite hybrid entanglement in quantum dot moleculesM Khoshnegar0A Jafari-Salim1M H Ansari2A H Majedi3Institute for Quantum Computing , Waterloo, Ontario N2L 3G1, Canada; Waterloo Institute for Nanotechnology , Waterloo, Ontario N2L 3G1, Canada; Department of Electrical and Computer Engineering, University of Waterloo , Waterloo, Ontario N2L 3G1, CanadaInstitute for Quantum Computing , Waterloo, Ontario N2L 3G1, Canada; Department of Electrical and Computer Engineering, University of Waterloo , Waterloo, Ontario N2L 3G1, CanadaInstitute for Quantum Computing , Waterloo, Ontario N2L 3G1, Canada; Department of Physics and Astronomy, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada; Kavli Institute for Nanoscience, Delft University of Technology , PO Box 5046, 2600-GA Delft, The NetherlandsInstitute for Quantum Computing , Waterloo, Ontario N2L 3G1, Canada; Department of Electrical and Computer Engineering, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada; Perimeter Institute for Theoretical Physics , Waterloo, Ontario N2L 3G1, Canada; School of Engineering and Applied Sciences, Harvard University , Cambridge, MA 02138, USAEstablishing the hybrid entanglement among a growing amount of matter and photonic quantum bits is necessary for scalable quantum computation and long-distance quantum communication. Here we demonstrate that charged excitonic complexes forming in strongly correlated quantum dot molecules are able to generate tripartite hybrid entanglement under proper carrier quantization. The mixed orbitals of the molecule construct multi-level ground states with sub-meV hole tunneling energy and relatively large electron hybridization energy. We show that appropriate size and interdot spacing keeps the electron particle weakly localized, opening extra recombination channels by correlating ground-state excitons. This allows for creation of higher order entangled states. Nontrivial hole tunneling energy, renormalized by multi-particle interactions, facilitates the realization of the energy coincidence among only certain components of the molecule optical spectrum. This translates to the emergence of favorable spectral components in a multi-body excitonic complex which sustain principal oscillator strengths throughout the electric field-induced hole tunneling process. We particularly analyze whether the level broadening of favorable spin configurations could be manipulated to eliminate the distinguishability of photons.https://doi.org/10.1088/1367-2630/16/2/023019 |
| spellingShingle | M Khoshnegar A Jafari-Salim M H Ansari A H Majedi Toward tripartite hybrid entanglement in quantum dot molecules New Journal of Physics |
| title | Toward tripartite hybrid entanglement in quantum dot molecules |
| title_full | Toward tripartite hybrid entanglement in quantum dot molecules |
| title_fullStr | Toward tripartite hybrid entanglement in quantum dot molecules |
| title_full_unstemmed | Toward tripartite hybrid entanglement in quantum dot molecules |
| title_short | Toward tripartite hybrid entanglement in quantum dot molecules |
| title_sort | toward tripartite hybrid entanglement in quantum dot molecules |
| url | https://doi.org/10.1088/1367-2630/16/2/023019 |
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