Results 11 to 20 of about 1,174 (142)
Subradiance-protected excitation transport
New Journal of Physics, 2019 We explore excitation transport within a one-dimensional chain of atoms where the atomic transition dipoles are coupled to the free radiation field. When the atoms are separated by distances smaller or comparable to the wavelength of the transition, the ...
Jemma A Needham +2 more
doaj +3 more sources
Subradiance and radiation trapping in cold atoms
New Journal of Physics, 2018 We experimentally and numerically study the temporal dynamics of light scattered by large clouds of cold atoms after the exciting laser is switched off, in the low intensity (linear-optics) regime. Radiation trapping due to multiple scattering as well as
Patrizia Weiss +3 more
doaj +3 more sources
Directional Dicke Subradiance with Nonclassical and Classical Light Sources [PDF]
Physical Review Letters, 2017 We investigate Dicke subradiance of distant quantum sources in free space, i.e., the spatial emission pattern of spontaneously radiating non-interacting multi-level atoms or multi-photon sources, prepared in totally antisymmetric states. We find that the
Bhatti, Daniel +3 more
core +3 more sources
Subradiance in a Large Cloud of Cold Atoms [PDF]
Physical Review Letters, 2016 Since Dicke's seminal paper on coherence in spontaneous radiation by atomic ensembles, superradiance has been extensively studied. Subradiance, on the contrary, has remained elusive, mainly because subradiant states are weakly coupled to the environment ...
Araújo, Michelle O. +2 more
core +4 more sources
Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser [PDF]
Physical Review Letters, 2021 6 pages Main Text + 7 pages Supplemental ...
Athreya Shankar +3 more
openaire +3 more sources
Subradiance and superradiance-to-subradiance transition in dilute atomic clouds [PDF]
Physical Review A, 2020 We experimentally study subradiance in a dilute cloud of ultracold rubidium (Rb) atoms where $n _a^3 \approx 10^{-2}$ ($n$: atomic density, $ _a$ excitation wavelength) and the on-resonance optical depth of the cloud is of order unity. We show that in the strong excitation regime, the subradiant time-scales depend on the excitation fraction of the ...
Das, Diptaranjan +2 more
openaire +2 more sources
Subradiant Split Cooper Pairs [PDF]
Physical Review Letters, 2012 We suggest a way to characterize the coherence of the split Cooper pairs emitted by a double-quantum-dot based Cooper pair splitter (CPS), by studying the radiative response of such a CPS inside a microwave cavity. The coherence of the split pairs manifests in a strongly nonmonotonic variation of the emitted radiation as a function of the parameters ...
Cottet, Audrey +2 more
openaire +3 more sources
Annalen der Physik, Volume 533, Issue 5, May 2021., 2021 A common environment acting on a pair of qubits gives rise to a plethora of different phenomena, such as the generation of qubit–qubit entanglement, quantum synchronization, and subradiance. Time‐independent figures of merit for entanglement generation, quantum synchronization, and subradiance, are defined, and an extensive analytical and numerical ...
Marco Cattaneo +4 more
wiley +1 more source
Parity‐time symmetry and coherent perfect absorption in a cooperative atom response
Nanophotonics, Volume 10, Issue 4, Page 1357-1366, March 2021., 2021 Abstract Parity‐Time (PT) symmetry has become an important concept in the design of synthetic optical materials, with exotic functionalities such as unidirectional transport and nonreciprocal reflection. At exceptional points, this symmetry is spontaneously broken, and solutions transition from those with conserved intensity to exponential growth or ...
Kyle E. Ballantine, Janne Ruostekoski
wiley +1 more source
Polariton dynamics in one-dimensional arrays of atoms coupled to waveguides
New Journal of Physics, 2022 Photons strongly coupled to material systems constitute a novel system for realizing non-linear optics at the level of individual photons and studying the dynamics of non-equilibrium quantum many-body system.
Björn Schrinski, Anders S Sørensen
doaj +1 more source