Role of quantum interference in superradiant decay

1970 ◽  
Vol 3 (18) ◽  
pp. 598-599 ◽  
Author(s):  
F. T. Arecchi ◽  
D. M. Kim ◽  
I. W. Smith
Keyword(s):  
Quantum Interference

scholarly journals A Review on Metamaterials for Device Applications

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 518
Author(s):  
N. Suresh Kumar ◽  
K. Chandra Babu Naidu ◽  
Prasun Banerjee ◽  
T. Anil Babu ◽  
B. Venkata Shiva Reddy
Keyword(s):  
Quantum Interference ◽  
Effective Properties ◽  
Photonic Devices ◽  
Vital Role ◽  
Major Type ◽  
Electric Permittivity ◽  
Superconducting Quantum Interference Devices ◽  
Device Applications ◽  
Microwave Sensors

Metamaterials are the major type of artificially engineered materials which exhibit naturally unobtainable properties according to how their microarchitectures are engineered. Owing to their unique and controllable effective properties, including electric permittivity and magnetic permeability, the metamaterials play a vital role in the development of meta-devices. Therefore, the recent research has mainly focused on shifting towards achieving tunable, switchable, nonlinear, and sensing functionalities. In this review, we summarize the recent progress in terahertz, microwave electromagnetic, and photonic metamaterials, and their applications. The review also encompasses the role of metamaterials in the advancement of microwave sensors, photonic devices, antennas, energy harvesting, and superconducting quantum interference devices (SQUIDs).

scholarly journals Unravelling the role of quantum interference in the weak-field laser phase modulation control of photofragment distributions

2016 ◽  
Vol 18 (6) ◽  
pp. 4772-4779 ◽  
Author(s):  
Alberto García-Vela ◽  
Niels E. Henriksen
Keyword(s):  
Phase Modulation ◽  
Quantum Interference ◽  
Weak Field ◽  
Transient Phase ◽  
Modulation Control

The postpulse transient phase modulation effects observed on fragment populations are explained in terms of the mechanism of interference between overlapping resonances.

Role of quantum interference in thermodynamic equilibrium

1999 ◽  
Vol 59 (1) ◽  
pp. 708-713 ◽  
Author(s):  
V. Savchenko ◽  
N. Fisch ◽  
A. Panteleev ◽  
A. Starostin
Keyword(s):  
Thermodynamic Equilibrium ◽  
Quantum Interference

scholarly journals Ferromagnetic material in the eastern red-spotted newt notophthalmus viridescens

1999 ◽  
Vol 202 (22) ◽  
pp. 3155-3160 ◽  
Author(s):  
J. Brassart ◽  
J.L. Kirschvink ◽  
J.B. Phillips ◽  
S.C. Borland
Keyword(s):  
Magnetic Material ◽  
Quantum Interference ◽  
Ferromagnetic Material ◽  
Natural Remanent Magnetization ◽  
The Body ◽  
Limited Area ◽  
Notophthalmus Viridescens ◽  
Behavioral Assays ◽  
Dependent Mechanism

Behavioral results obtained from the eastern red-spotted newt (Notophthalmus viridescens) led to the suggestion of a hybrid homing system involving inputs from both a light-dependent and a non-light-dependent mechanism. To evaluate the possible role of a receptor based on biogenic magnetite in this animal, we performed magnetometry experiments on a set of newts previously used in behavioral assays. The natural remanent magnetization (NRM) carried by these newts was strong enough to be measured easily using a direct-current-biased superconducting quantum interference device functioning as a moment magnetometer. Isothermal remanent magnetizations were two orders of magnitude higher than the NRM, suggesting that ferromagnetic material consistent with magnetite is present in the body of the newt. The NRM has no preferential orientation among the animals when analyzed relative to their body axis, and the demagnetization data show that, overall, the magnetic material grains are not aligned parallel to each other within each newt. Although the precise localization of the particles was not possible, the data indicate that magnetite is not clustered in a limited area. A quantity of single-domain magnetic material is present which would be adequate for use in either a magnetic intensity or direction receptor. Our data, when combined with the functional properties of homing, suggest a link between this behavioral response and the presence of ferromagnetic material, raising the possibility that magnetite is involved at least in the map component of homing of the eastern red-spotted newt.

scholarly journals The Anomalous Effect of Quantum Interference in Organic Spin Filters

2020 ◽  
Author(s):  
Ashima Bajaj ◽  
Prabhleen Kaur ◽  
Aakanksha Sud ◽  
Marco Berritta ◽  
Md. Ehesan Ali
Keyword(s):  
Quantum Interference ◽  
Density Functional ◽  
Organic Radicals ◽  
Spin Coupling ◽  
Anomalous Effect ◽  
Spin Filters ◽  
Molecular Conductance ◽  
Spin Spin Coupling ◽  
Spin Filtering

The molecular topology in the single-molecular nano-junctions through which the de Broglie wave propagates plays a crucial role in controlling the molecular conductance. The enhancement and reduction of the conductance due to constructive and destructive Quantum Interference (QI) in para and meta connected molecules respectively has already been well established. Herein, we investigated the influence of QI on spin transport in the molecular junctions containing organic radicals as magnetic centres. The role of the localized spins on the QI as well as on spin filtering capability is investigated employing density functional theory in combination with non-equilibrium Green's function (NEGF-DFT) techniques. Various organic radicals including nitroxide (NO), phenoxy (PO) and methyl (CH2) radicals attached to the central benzene ring of pentacene with different terminal connections (para and meta) to gold electrodes are examined. Due to more obvious QI effects, para connected pentacene is found to be more conductive than meta one. Surprisingly, on incorporating a radical centre, along with spin filtering, a significant quenching of QI effects is observed which manifests itself in such a way that the conductance of meta coupled radicals is found to be more than para by two orders of magnitude. The decoherence induced by radical centre is analysed and discussed in terms of spin-spin coupling of radical's unpaired electron with the tunneling electrons.<br>

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