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.com
Volume 4, Issue 3(Suppl)
J Laser Opt Photonics, an open access journal
ISSN: 2469-410X
Quantum Physics 2017
September 25-26, 2017
September 25-26, 2017 Berlin, Germany
2
nd
International Conference on
Quantum Physics and
Quantum Technology
Quantum wave mixing and resolving photonic classical and non-classical coherent states
Vladimir N Antonov
1,2
1
Royal Holloway University of London, UK
2
Moscow Institute of Physics and Technology, Russia
S
uperconducting quantum systems- artificial atoms are building blocks of novel on-chip quantum electronics, which utilize the
quantum nature of electromagnetic waves. Particularly, single atoms can create and reveal quantized light states beyond classical
statistics. In this work we demonstrate a novel fundamental physical phenomenon, the Quantum Wave Mixing (QWM), which is
attainable only in the systems where light-matter interaction is arranged between an individual photons and a single atom. QWM
reveals itself as an elastic scattering of coherent classical and non-classical photonic states of electromagnetic waves on a single
artificial atom in a 1D space. We demonstrate two regimes of QWM, comprising different degrees of “quantumness". The most
spectacular one is QWM with non-classical coherent states, exhibiting spectra of a finite number of narrow coherent emission peaks.
The spectrum is a fingerprint of interacting photon states, where the number of positive frequency peaks (due to stimulated emission)
always exceeds by one the negative ones (due to absorption). We also study four- and higher-order wave mixing of classical coherent
waves on the artificial atom. In this case the time dynamics of the peaks exhibits a series of Bessel-function quantum oscillations with
orders determined by the number of interacting photons.
Biography
Vladimir N Antonov has his expertise in Solid State Nanophysics. He is one of scientists who made a breakthrough in experiments on quantum phenomena
in low dimensional hybrid nanostructures, like Andreev interferometer, ferromagnetic/superconducting systems. A single photon terahertz detector based on
semiconductors quantum dot developed in collaboration with Profs. Komiyama and Astafiev keeps a record sensitivity and it is used in a number of applications. A
recent activity in superconducting quantum circuitry, superconducting resonators of high quality factors, and nanomagnetics is a subject of a number of publications
in high ranked journals. He is also involved in development of the technology of high power diode laser for communications as an expert in nanofabrication.
v.antonov@rhul.ac.ukVladimir N Antonov, J Laser Opt Photonics 2017, 4:3(Suppl)
DOI: 10.4172/2469-410X-C1-014
Figure:
a) A false colored SEM image of the device a superconducting loop with four Josephson junctions, behaving as an artificial atom, is
embedded into a transmission line and strongly interacts with propagating electromagnetic waves. b) Four-wave mixing processes resulting in the
single-phoon field creation at
ω
3
=2
ω
+
-
ω
-
. In classical mixing, the process operators a
+
a*
-
a
+
b
+
3
come in pair with the symmetric one a
-
a*
+
a
-
b
+
3
. In
the mixing with non-classical states, the time symmetry is broken resulting in the asymmetric spectrum. c) Schematic representation of QWM with
non-classical coherent states. Two sequential pulses of
ω
+. Single-photon, Nph = 1, state |
β
>
-
can only create a peak at
ω
3
=2
ω
+
-
ω
-
. Two photon,
Nph = 2, coherent state |
γ
>
-
results in creation of an additional; peak at 3
ω
+
-
2
ω
-
. because not more than two photons can be emitted. An additional
left-hand-side peak appears at 2
ω
-
-
ω
+
in this case.