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Title: Generating spatially entangled itinerant photons with waveguide quantum electrodynamics

Abstract

Realizing a fully connected network of quantum processors requires the ability to distribute quantum entanglement. For distant processing nodes, this can be achieved by generating, routing, and capturing spatially entangled itinerant photons. In this work, we demonstrate the deterministic generation of such photons using superconducting transmon qubits that are directly coupled to a waveguide. In particular, we generate two-photon N00N states and show that the state and spatial entanglement of the emitted photons are tunable via the qubit frequencies. Using quadrature amplitude detection, we reconstruct the moments and correlations of the photonic modes and demonstrate state preparation fidelities of 84%. Our results provide a path toward realizing quantum communication and teleportation protocols using itinerant photons generated by quantum interference within a waveguide quantum electrodynamics architecture.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1];  [2];  [3]; ORCiD logo [2];  [2];  [3];  [3];  [3];  [1]; ORCiD logo [2]; ORCiD logo [4]
  1. Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA., Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  2. Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  3. MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA.
  4. Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA., Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA., MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA., Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1670849
Resource Type:
Published Article
Journal Name:
Science Advances
Additional Journal Information:
Journal Name: Science Advances Journal Volume: 6 Journal Issue: 41; Journal ID: ISSN 2375-2548
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Kannan, B., Campbell, D. L., Vasconcelos, F., Winik, R., Kim, D. K., Kjaergaard, M., Krantz, P., Melville, A., Niedzielski, B. M., Yoder, J. L., Orlando, T. P., Gustavsson, S., and Oliver, W. D. Generating spatially entangled itinerant photons with waveguide quantum electrodynamics. United States: N. p., 2020. Web. doi:10.1126/sciadv.abb8780.
Kannan, B., Campbell, D. L., Vasconcelos, F., Winik, R., Kim, D. K., Kjaergaard, M., Krantz, P., Melville, A., Niedzielski, B. M., Yoder, J. L., Orlando, T. P., Gustavsson, S., & Oliver, W. D. Generating spatially entangled itinerant photons with waveguide quantum electrodynamics. United States. doi:10.1126/sciadv.abb8780.
Kannan, B., Campbell, D. L., Vasconcelos, F., Winik, R., Kim, D. K., Kjaergaard, M., Krantz, P., Melville, A., Niedzielski, B. M., Yoder, J. L., Orlando, T. P., Gustavsson, S., and Oliver, W. D. Wed . "Generating spatially entangled itinerant photons with waveguide quantum electrodynamics". United States. doi:10.1126/sciadv.abb8780.
@article{osti_1670849,
title = {Generating spatially entangled itinerant photons with waveguide quantum electrodynamics},
author = {Kannan, B. and Campbell, D. L. and Vasconcelos, F. and Winik, R. and Kim, D. K. and Kjaergaard, M. and Krantz, P. and Melville, A. and Niedzielski, B. M. and Yoder, J. L. and Orlando, T. P. and Gustavsson, S. and Oliver, W. D.},
abstractNote = {Realizing a fully connected network of quantum processors requires the ability to distribute quantum entanglement. For distant processing nodes, this can be achieved by generating, routing, and capturing spatially entangled itinerant photons. In this work, we demonstrate the deterministic generation of such photons using superconducting transmon qubits that are directly coupled to a waveguide. In particular, we generate two-photon N00N states and show that the state and spatial entanglement of the emitted photons are tunable via the qubit frequencies. Using quadrature amplitude detection, we reconstruct the moments and correlations of the photonic modes and demonstrate state preparation fidelities of 84%. Our results provide a path toward realizing quantum communication and teleportation protocols using itinerant photons generated by quantum interference within a waveguide quantum electrodynamics architecture.},
doi = {10.1126/sciadv.abb8780},
journal = {Science Advances},
number = 41,
volume = 6,
place = {United States},
year = {2020},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/sciadv.abb8780

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