scholarly journals Topological excitations and bound photon pairs in a superconducting quantum metamaterial

2021 ◽  
Vol 103 (22) ◽  
Author(s):  
Ilya S. Besedin ◽  
Maxim A. Gorlach ◽  
Nikolay N. Abramov ◽  
Ivan Tsitsilin ◽  
Ilya N. Moskalenko ◽  
...  
Keyword(s):  
Topological Excitations ◽  
Photon Pairs

scholarly journals Shaping Dynamical Casimir Photons

Universe ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 189
Author(s):  
Diego A. R. Dalvit ◽  
Wilton J. M. Kort-Kamp
Keyword(s):  
Optical Properties ◽  
Lattice Structure ◽  
Casimir Effect ◽  
Surface Profile ◽  
Microscopic Theory ◽  
Space Time ◽  
Quantum Vacuum ◽  
Dynamical Casimir Effect ◽  
Photon Pairs ◽  
Time Quantum

Temporal modulation of the quantum vacuum through fast motion of a neutral body or fast changes of its optical properties is known to promote virtual into real photons, the so-called dynamical Casimir effect. Empowering modulation protocols with spatial control could enable the shaping of spectral, spatial, spin, and entanglement properties of the emitted photon pairs. Space–time quantum metasurfaces have been proposed as a platform to realize this physics via modulation of their optical properties. Here, we report the mechanical analog of this phenomenon by considering systems in which the lattice structure undergoes modulation in space and in time. We develop a microscopic theory that applies both to moving mirrors with a modulated surface profile and atomic array meta-mirrors with perturbed lattice configuration. Spatiotemporal modulation enables motion-induced generation of co- and cross-polarized photon pairs that feature frequency-linear momentum entanglement as well as vortex photon pairs featuring frequency-angular momentum entanglement. The proposed space–time dynamical Casimir effect can be interpreted as induced dynamical asymmetry in the quantum vacuum.

scholarly journals Tunable quantum interference using a topological source of indistinguishable photon pairs

2021 ◽  
Author(s):  
Sunil Mittal ◽  
Venkata Vikram Orre ◽  
Elizabeth A. Goldschmidt ◽  
Mohammad Hafezi
Keyword(s):  
Quantum Interference ◽  
Photon Pairs

scholarly journals Topological excitations in statistical field theory at the upper critical dimension

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Marco Panero ◽  
Antonio Smecca
Keyword(s):  
Field Theory ◽  
Monte Carlo Study ◽  
Critical Dimension ◽  
Density Profiles ◽  
Upper Critical Dimension ◽  
Four Dimensions ◽  
Topological Excitations ◽  
Classical Heisenberg Model ◽  
Statistical Field ◽  
Statistical Field Theory

Abstract We present a high-precision Monte Carlo study of the classical Heisenberg model in four dimensions. We investigate the properties of monopole-like topological excitations that are enforced in the broken-symmetry phase by imposing suitable boundary conditions. We show that the corresponding magnetization and energy-density profiles are accurately predicted by previous analytical calculations derived in quantum field theory, while the scaling of the low-energy parameters of this description questions an interpretation in terms of particle excitations. We discuss the relevance of these findings and their possible experimental applications in condensed-matter physics.

Progress Toward Generation of Spatially-Entangled Photon Pairs in a Few-Mode Fiber

2020 ◽  
Author(s):  
Afshin Shamsshooli ◽  
Cheng Guo ◽  
Michael Vasilyev ◽  
Francesca Parmigiani ◽  
Xiaoying Li
Keyword(s):  
Photon Pairs ◽  
Entangled Photon Pairs

scholarly journals Engineering entangled photon pairs with metal–organic frameworks

2021 ◽  
Author(s):  
Rubén A. Fritz ◽  
Yamil J. Colón ◽  
Felipe Herrera
Keyword(s):  
Frequency Conversion ◽  
Metal Organic Frameworks ◽  
Optical Frequency ◽  
New Materials ◽  
Optical Frequency Conversion ◽  
Photon Pairs ◽  
Metal Organic ◽  
Entangled Photon Pairs ◽  
Conversion Efficiencies

The discovery and design of new materials with competitive optical frequency conversion efficiencies can accelerate the development of scalable photonic quantum technologies.

Generation and detection of magnified images via illumination by entangled photon pairs

2005 ◽  
Vol 72 (3) ◽  
Author(s):  
Ivan F. Santos ◽  
Leonardo Neves ◽  
G. Lima ◽  
C. H. Monken ◽  
S. Pádua
Keyword(s):  
Photon Pairs ◽  
Entangled Photon Pairs

scholarly journals Entangled photon pairs from the optical decay of biexcitons

1999 ◽  
Vol 111 (9) ◽  
pp. 495-500 ◽  
Author(s):  
S Savasta ◽  
G Martino ◽  
R Girlanda
Keyword(s):  
Photon Pairs ◽  
Entangled Photon Pairs

scholarly journals Entangled Photon Pairs Produced by a Quantum Dot Strongly Coupled to a Microcavity

2008 ◽  
Vol 100 (24) ◽  
Author(s):  
R. Johne ◽  
N. A Gippius ◽  
G. Pavlovic ◽  
D. D. Solnyshkov ◽  
I. A. Shelykh ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Strongly Coupled ◽  
Photon Pairs ◽  
Entangled Photon Pairs

scholarly journals Coherently controlled quantum features in a coupled interferometric scheme

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham
Keyword(s):  
Optical Materials ◽  
Bell Inequality ◽  
Third Order ◽  
Deterministic Method ◽  
Photon Pairs ◽  
Wave Nature ◽  
Parametric Down Conversion ◽  
Pair Generation ◽  
Entangled Photon Pairs ◽  
Down Conversion

AbstractOver the last several decades, entangled photon pairs generated by spontaneous parametric down conversion processes in both second-order and third-order nonlinear optical materials have been intensively studied for various quantum features such as Bell inequality violation and anticorrelation. In an interferometric scheme, anticorrelation results from photon bunching based on randomness when entangled photon pairs coincidently impinge on a beam splitter. Compared with post-measurement-based probabilistic confirmation, a coherence version has been recently proposed using the wave nature of photons. Here, the origin of quantum features in a coupled interferometric scheme is investigated using pure coherence optics. In addition, a deterministic method of entangled photon-pair generation is proposed for on-demand coherence control of quantum processing.

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