TY - JOUR
T1 - Direct observation of deterministic macroscopic entanglement
AU - Kotler, Shlomi
AU - Peterson, Gabriel A.
AU - Shojaee, Ezad
AU - Lecocq, Florent
AU - Cicak, Katarina
AU - Kwiatkowski, Alex
AU - Geller, Shawn
AU - Glancy, Scott
AU - Knill, Emanuel
AU - Simmonds, Raymond W.
AU - Aumentado, José
AU - Teufel, John D.
N1 - Publisher Copyright:
© 2021 American Association for the Advancement of Science. All rights reserved.
PY - 2021/5/7
Y1 - 2021/5/7
N2 - Quantum entanglement of mechanical systems emerges when distinct objects move with such a high degree of correlation that they can no longer be described separately. Although quantum mechanics presumably applies to objects of all sizes, directly observing entanglement becomes challenging as masses increase, requiring measurement and control with a vanishingly small error. Here, using pulsed electromechanics, we deterministically entangle two mechanical drumheads with masses of 70 picograms. Through nearly quantum-limited measurements of the position and momentum quadratures of both drums, we perform quantum state tomography and thereby directly observe entanglement. Such entangled macroscopic systems are poised to serve in fundamental tests of quantum mechanics, enable sensing beyond the standard quantum limit, and function as long-lived nodes of future quantum networks.
AB - Quantum entanglement of mechanical systems emerges when distinct objects move with such a high degree of correlation that they can no longer be described separately. Although quantum mechanics presumably applies to objects of all sizes, directly observing entanglement becomes challenging as masses increase, requiring measurement and control with a vanishingly small error. Here, using pulsed electromechanics, we deterministically entangle two mechanical drumheads with masses of 70 picograms. Through nearly quantum-limited measurements of the position and momentum quadratures of both drums, we perform quantum state tomography and thereby directly observe entanglement. Such entangled macroscopic systems are poised to serve in fundamental tests of quantum mechanics, enable sensing beyond the standard quantum limit, and function as long-lived nodes of future quantum networks.
UR - http://www.scopus.com/inward/record.url?scp=85105427842&partnerID=8YFLogxK
U2 - 10.1126/science.abf2998
DO - 10.1126/science.abf2998
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
C2 - 33958475
AN - SCOPUS:85105427842
SN - 0036-8075
VL - 372
SP - 622
EP - 625
JO - Science
JF - Science
IS - 6542
ER -