Abstract:
:Interfacing a single photon with another quantum system is a key capability in modern quantum information science. It allows quantum states of matter, such as spin states of atoms, atomic ensembles or solids, to be prepared and manipulated by photon counting and, in particular, to be distributed over long distances. Such light-matter interfaces have become crucial to fundamental tests of quantum physics and realizations of quantum networks. Here we report non-classical correlations between single photons and phonons--the quanta of mechanical motion--from a nanomechanical resonator. We implement a full quantum protocol involving initialization of the resonator in its quantum ground state of motion and subsequent generation and read-out of correlated photon-phonon pairs. The observed violation of a Cauchy-Schwarz inequality is clear evidence for the non-classical nature of the mechanical state generated. Our results demonstrate the availability of on-chip solid-state mechanical resonators as light-matter quantum interfaces. The performance we achieved will enable studies of macroscopic quantum phenomena as well as applications in quantum communication, as quantum memories and as quantum transducers.
journal_name
Naturejournal_title
Natureauthors
Riedinger R,Hong S,Norte RA,Slater JA,Shang J,Krause AG,Anant V,Aspelmeyer M,Gröblacher Sdoi
10.1038/nature16536subject
Has Abstractpub_date
2016-02-18 00:00:00pages
313-6issue
7590eissn
0028-0836issn
1476-4687pii
nature16536journal_volume
530pub_type
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