---
_id: '6609'
abstract:
- lang: eng
text: Mechanical systems facilitate the development of a hybrid quantum technology
comprising electrical, optical, atomic and acoustic degrees of freedom1, and entanglement
is essential to realize quantum-enabled devices. Continuous-variable entangled
fields—known as Einstein–Podolsky–Rosen (EPR) states—are spatially separated two-mode
squeezed states that can be used for quantum teleportation and quantum communication2.
In the optical domain, EPR states are typically generated using nondegenerate
optical amplifiers3, and at microwave frequencies Josephson circuits can serve
as a nonlinear medium4,5,6. An outstanding goal is to deterministically generate
and distribute entangled states with a mechanical oscillator, which requires a
carefully arranged balance between excitation, cooling and dissipation in an ultralow
noise environment. Here we observe stationary emission of path-entangled microwave
radiation from a parametrically driven 30-micrometre-long silicon nanostring oscillator,
squeezing the joint field operators of two thermal modes by 3.40 decibels below
the vacuum level. The motion of this micromechanical system correlates up to 50
photons per second per hertz, giving rise to a quantum discord that is robust
with respect to microwave noise7. Such generalized quantum correlations of separable
states are important for quantum-enhanced detection8 and provide direct evidence
of the non-classical nature of the mechanical oscillator without directly measuring
its state9. This noninvasive measurement scheme allows to infer information about
otherwise inaccessible objects, with potential implications for sensing, open-system
dynamics and fundamental tests of quantum gravity. In the future, similar on-chip
devices could be used to entangle subsystems on very different energy scales,
such as microwave and optical photons.
acknowledged_ssus:
- _id: NanoFab
article_processing_charge: No
author:
- first_name: Shabir
full_name: Barzanjeh, Shabir
id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87
last_name: Barzanjeh
orcid: 0000-0003-0415-1423
- first_name: Elena
full_name: Redchenko, Elena
id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87
last_name: Redchenko
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Matthias
full_name: Wulf, Matthias
id: 45598606-F248-11E8-B48F-1D18A9856A87
last_name: Wulf
orcid: 0000-0001-6613-1378
- first_name: Dylan
full_name: Lewis, Dylan
last_name: Lewis
- first_name: Georg M
full_name: Arnold, Georg M
id: 3770C838-F248-11E8-B48F-1D18A9856A87
last_name: Arnold
orcid: 0000-0003-1397-7876
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Barzanjeh S, Redchenko E, Peruzzo M, et al. Stationary entangled radiation
from micromechanical motion. Nature. 2019;570:480-483. doi:10.1038/s41586-019-1320-2
apa: Barzanjeh, S., Redchenko, E., Peruzzo, M., Wulf, M., Lewis, D., Arnold, G.
M., & Fink, J. M. (2019). Stationary entangled radiation from micromechanical
motion. Nature. Nature Publishing Group. https://doi.org/10.1038/s41586-019-1320-2
chicago: Barzanjeh, Shabir, Elena Redchenko, Matilda Peruzzo, Matthias Wulf, Dylan
Lewis, Georg M Arnold, and Johannes M Fink. “Stationary Entangled Radiation from
Micromechanical Motion.” Nature. Nature Publishing Group, 2019. https://doi.org/10.1038/s41586-019-1320-2.
ieee: S. Barzanjeh et al., “Stationary entangled radiation from micromechanical
motion,” Nature, vol. 570. Nature Publishing Group, pp. 480–483, 2019.
ista: Barzanjeh S, Redchenko E, Peruzzo M, Wulf M, Lewis D, Arnold GM, Fink JM.
2019. Stationary entangled radiation from micromechanical motion. Nature. 570,
480–483.
mla: Barzanjeh, Shabir, et al. “Stationary Entangled Radiation from Micromechanical
Motion.” Nature, vol. 570, Nature Publishing Group, 2019, pp. 480–83, doi:10.1038/s41586-019-1320-2.
short: S. Barzanjeh, E. Redchenko, M. Peruzzo, M. Wulf, D. Lewis, G.M. Arnold, J.M.
Fink, Nature 570 (2019) 480–483.
date_created: 2019-07-07T21:59:20Z
date_published: 2019-06-27T00:00:00Z
date_updated: 2023-08-28T12:29:56Z
day: '27'
department:
- _id: JoFi
doi: 10.1038/s41586-019-1320-2
ec_funded: 1
external_id:
arxiv:
- '1809.05865'
isi:
- '000472860000042'
intvolume: ' 570'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1809.05865
month: '06'
oa: 1
oa_version: Preprint
page: 480-483
project:
- _id: 257EB838-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '732894'
name: Hybrid Optomechanical Technologies
- _id: 26336814-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '758053'
name: A Fiber Optic Transceiver for Superconducting Qubits
- _id: 258047B6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '707438'
name: 'Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination
with cavity Optomechanics'
- _id: 2671EB66-B435-11E9-9278-68D0E5697425
name: Coherent on-chip conversion of superconducting qubit signals from microwaves
to optical frequencies
publication: Nature
publication_status: published
publisher: Nature Publishing Group
quality_controlled: '1'
scopus_import: '1'
status: public
title: Stationary entangled radiation from micromechanical motion
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 570
year: '2019'
...