Fully Arbitrary Control of Frequency-Bin Qubits
Abstract
Accurate control of two-level systems is a longstanding problem in quantum mechanics. One such quantum system is the frequency-bin qubit: a single photon existing in superposition of two discrete frequency modes. In this Letter, we demonstrate fully arbitrary control of frequency-bin qubits in a quantum frequency processor for the first time. Furthermore, we numerically establish optimal settings for multiple configurations of electro-optic phase modulators and pulse shapers, experimentally confirming near-unity mode-transformation fidelity for all fundamental rotations. Performance at the single-photon level is validated through the rotation of a single frequency-bin qubit to 41 points spread over the entire Bloch sphere, as well as tracking of the state path followed by the output of a tunable frequency beam splitter, with Bayesian tomography confirming state fidelities Fρ>0.98 for all cases. Overall, such high-fidelity transformations expand the practical potential of frequency encoding in quantum communications, offering exceptional precision and low noise in general qubit manipulation.
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States). Purdue Quantum Science and Engineering Inst.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Amazon Web Services, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF)
- OSTI Identifier:
- 1661226
- Grant/Contract Number:
- AC05-00OR22725; 1839191-ECCS
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 125; Journal Issue: 12; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Optical quantum information processing; optoelectronics; photonics; quantum gates; quantum optics; quantum tomography
Citation Formats
Lu, Hsuan-Hao, Simmerman, Emma M., Lougovski, Pavel, Weiner, Andrew M., and Lukens, Joseph M.. Fully Arbitrary Control of Frequency-Bin Qubits. United States: N. p., 2020.
Web. doi:10.1103/physrevlett.125.120503.
Lu, Hsuan-Hao, Simmerman, Emma M., Lougovski, Pavel, Weiner, Andrew M., & Lukens, Joseph M.. Fully Arbitrary Control of Frequency-Bin Qubits. United States. https://doi.org/10.1103/physrevlett.125.120503
Lu, Hsuan-Hao, Simmerman, Emma M., Lougovski, Pavel, Weiner, Andrew M., and Lukens, Joseph M.. Mon .
"Fully Arbitrary Control of Frequency-Bin Qubits". United States. https://doi.org/10.1103/physrevlett.125.120503. https://www.osti.gov/servlets/purl/1661226.
@article{osti_1661226,
title = {Fully Arbitrary Control of Frequency-Bin Qubits},
author = {Lu, Hsuan-Hao and Simmerman, Emma M. and Lougovski, Pavel and Weiner, Andrew M. and Lukens, Joseph M.},
abstractNote = {Accurate control of two-level systems is a longstanding problem in quantum mechanics. One such quantum system is the frequency-bin qubit: a single photon existing in superposition of two discrete frequency modes. In this Letter, we demonstrate fully arbitrary control of frequency-bin qubits in a quantum frequency processor for the first time. Furthermore, we numerically establish optimal settings for multiple configurations of electro-optic phase modulators and pulse shapers, experimentally confirming near-unity mode-transformation fidelity for all fundamental rotations. Performance at the single-photon level is validated through the rotation of a single frequency-bin qubit to 41 points spread over the entire Bloch sphere, as well as tracking of the state path followed by the output of a tunable frequency beam splitter, with Bayesian tomography confirming state fidelities Fρ>0.98 for all cases. Overall, such high-fidelity transformations expand the practical potential of frequency encoding in quantum communications, offering exceptional precision and low noise in general qubit manipulation.},
doi = {10.1103/physrevlett.125.120503},
journal = {Physical Review Letters},
number = 12,
volume = 125,
place = {United States},
year = {2020},
month = {9}
}
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