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Title: Quantum Computing with Exciton Qubits in Colloidal Semiconductor Nanocrystals

Abstract

The present work evaluates the feasibility of quantum computing with exciton qubits in coupled colloidal semiconductor nanocrystals (NCs). A strategy for manipulating two-qubit states of colloidal NC hetero-dimers is described. We show that a sequence of laser pulses with the same photon energy can bring excitonic states of a nanocrystal hetero-dimer into entanglement and perform arbitrary qubit rotations (quantum gates). Our simulations of a realistic two-particle assembly of CdSe/CdS core/shell NCs demonstrate that such two-qubit gate operations can be driven by optical parametric oscillators with a theoretical error of 0.1%. A strategy for upscaling two-qubit hetero-dimers to N-qubit exciton gates in semiconductor NC assemblies is discussed.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Bowling Green State Univ., OH (United States)
Publication Date:
Research Org.:
Bowling Green State Univ., OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1831439
Alternate Identifier(s):
OSTI ID: 1865408
Grant/Contract Number:  
SC0016872
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 125; Journal Issue: 40; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Harankahage, Dulanjan, Cassidy, James, Yang, Mingrui, Porotnikov, Dmitry, Williams, Maia, Kholmicheva, Natalia, and Zamkov, Mikhail. Quantum Computing with Exciton Qubits in Colloidal Semiconductor Nanocrystals. United States: N. p., 2021. Web. doi:10.1021/acs.jpcc.1c05009.
Harankahage, Dulanjan, Cassidy, James, Yang, Mingrui, Porotnikov, Dmitry, Williams, Maia, Kholmicheva, Natalia, & Zamkov, Mikhail. Quantum Computing with Exciton Qubits in Colloidal Semiconductor Nanocrystals. United States. https://doi.org/10.1021/acs.jpcc.1c05009
Harankahage, Dulanjan, Cassidy, James, Yang, Mingrui, Porotnikov, Dmitry, Williams, Maia, Kholmicheva, Natalia, and Zamkov, Mikhail. 2021. "Quantum Computing with Exciton Qubits in Colloidal Semiconductor Nanocrystals". United States. https://doi.org/10.1021/acs.jpcc.1c05009. https://www.osti.gov/servlets/purl/1831439.
@article{osti_1831439,
title = {Quantum Computing with Exciton Qubits in Colloidal Semiconductor Nanocrystals},
author = {Harankahage, Dulanjan and Cassidy, James and Yang, Mingrui and Porotnikov, Dmitry and Williams, Maia and Kholmicheva, Natalia and Zamkov, Mikhail},
abstractNote = {The present work evaluates the feasibility of quantum computing with exciton qubits in coupled colloidal semiconductor nanocrystals (NCs). A strategy for manipulating two-qubit states of colloidal NC hetero-dimers is described. We show that a sequence of laser pulses with the same photon energy can bring excitonic states of a nanocrystal hetero-dimer into entanglement and perform arbitrary qubit rotations (quantum gates). Our simulations of a realistic two-particle assembly of CdSe/CdS core/shell NCs demonstrate that such two-qubit gate operations can be driven by optical parametric oscillators with a theoretical error of 0.1%. A strategy for upscaling two-qubit hetero-dimers to N-qubit exciton gates in semiconductor NC assemblies is discussed.},
doi = {10.1021/acs.jpcc.1c05009},
url = {https://www.osti.gov/biblio/1831439}, journal = {Journal of Physical Chemistry. C},
issn = {1932-7447},
number = 40,
volume = 125,
place = {United States},
year = {Mon Oct 04 00:00:00 EDT 2021},
month = {Mon Oct 04 00:00:00 EDT 2021}
}

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