"Photon-Atom gates " , part of Condensed Matter and Quantum Science seminar
Event details
| Date | 14.06.2019 |
| Hour | 15:15 › 16:45 |
| Speaker | Prof Barak DAYAN, Head of the Quantum Optics group at the Weizmann Institute, focusing on deterministic photon-atom and photon-photon interactions and gates by fibre-based single-atom cavity-QED. |
| Location | |
| Category | Conferences - Seminars |
Abstract
Deterministic quantum gates between single photons and single quantum emitters are a valuable building block for the distribution of quantum information between remote systems, as well as for the construction of valuable photonic states. I will review the tools cavity-QED provides for the construction of such gates, and present our recent demonstration of a photon-atom swap gate [1]. The underlying mechanism is single-photon Raman interaction (SPRINT) - an interference-based effect in which a photonic qubit deterministically controls the state of a material qubit and vice versa [2-4]. This open-system scheme is applicable to any waveguide-coupled Lambda system (it has been also demonstrated in microwave with superconducting qubits [5-6]) and can serve as a basis for a variety of other photon-"atom" interactions - from universal gates, through QND measurement, to the preparations of nonclassical states of light such as single-photon subtracted or added states, CAT states, and cluster states for one-way photonic quantum computation.
[1] Nature Physics 14, 996 (2018)
[2] Science 345, 903 (2014)
[3] Nature Photonics 10, 19 (2016)
[4] Phys. Rev. A 95, 0333814 (2017)
[5] Phys. Rev. Lett. 113, 0636104 (2014)
[6] Nature Communications 7, 1 (2016)
Deterministic quantum gates between single photons and single quantum emitters are a valuable building block for the distribution of quantum information between remote systems, as well as for the construction of valuable photonic states. I will review the tools cavity-QED provides for the construction of such gates, and present our recent demonstration of a photon-atom swap gate [1]. The underlying mechanism is single-photon Raman interaction (SPRINT) - an interference-based effect in which a photonic qubit deterministically controls the state of a material qubit and vice versa [2-4]. This open-system scheme is applicable to any waveguide-coupled Lambda system (it has been also demonstrated in microwave with superconducting qubits [5-6]) and can serve as a basis for a variety of other photon-"atom" interactions - from universal gates, through QND measurement, to the preparations of nonclassical states of light such as single-photon subtracted or added states, CAT states, and cluster states for one-way photonic quantum computation.
[1] Nature Physics 14, 996 (2018)
[2] Science 345, 903 (2014)
[3] Nature Photonics 10, 19 (2016)
[4] Phys. Rev. A 95, 0333814 (2017)
[5] Phys. Rev. Lett. 113, 0636104 (2014)
[6] Nature Communications 7, 1 (2016)
Practical information
- Informed public
- Free
- This event is internal
Organizer
- Prof Christophe Galland
Contact
- Itay Shomroni