Digital Repository

0D-2D heterostructure for making very large quantum registers using ‘itinerant’ Bose-Einstein condensate of excitons

Show simple item record BHUNIA, AMIT en_US SINGH, MOHIT KUMAR en_US Huwayz, Maryam Al en_US Henini, Mohamed en_US DATTA, SHOUVIK en_US 2023-06-26T03:56:27Z 2023-06-26T03:56:27Z 2023-06 en_US
dc.identifier.citation Materials Today Electronics, 4, 100039. en_US
dc.identifier.issn 2772-9494 en_US
dc.identifier.uri en_US
dc.description.abstract Presence of coherent ‘resonant’ tunneling in quantum dot (zero-dimensional) - quantum well (two-dimensional) heterostructure is necessary to explain the collective oscillations of average electrical polarization of excitonic dipoles over a macroscopically large area. This was measured using photo excited capacitance as a function of applied voltage bias. Resonant tunneling in this heterostructure definitely requires momentum space narrowing of charge carriers inside the quantum well and that of associated indirect excitons, which indicates bias dependent ‘itinerant’ Bose-Einstein condensation of excitons. Observation of periodic variations in negative quantum capacitance points to in-plane coulomb correlations mediated by long range spatial ordering of indirect, dipolar excitons. Enhanced contrast of quantum interference beats of excitonic polarization waves even under white light and observed Rabi oscillations over a macroscopically large area also support the presence of density driven excitonic condensation having long range order. Periodic presence (absence) of splitting of excitonic peaks in photocapacitance spectra even demonstrate collective coupling (decoupling) between energy levels of the quantum well and quantum dots with applied biases, which can potentially be used for quantum gate operations. All these observations point to experimental control of macroscopically large, quantum state of a two-component Bose-Einstein condensate of excitons in this quantum dot - quantum well heterostructure. Therefore, in principle, millions of two-level excitonic qubits can be intertwined to fabricate large quantum registers using such hybrid heterostructure by controlling the local electric fields and also by varying photoexcitation intensities of overlapping light spots. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. en_US
dc.subject Exciton en_US
dc.subject Bose-Einstein Condensation en_US
dc.subject Quantum Dot en_US
dc.subject Quantum Well en_US
dc.subject Quantum Gates en_US
dc.subject Quantum Optoelectronics en_US
dc.subject 2023-JUN-WEEK2 en_US
dc.subject TOC-JUN-2023 en_US
dc.subject 2023 en_US
dc.title 0D-2D heterostructure for making very large quantum registers using ‘itinerant’ Bose-Einstein condensate of excitons
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Materials Today Electronics en_US
dc.publication.originofpublisher Foreign en_US

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Repository

Advanced Search


My Account