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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Approximation Distillation of Quantum Coherence
量子相干性 近似蒸馏 相干资源理论
2023/3/14
Coherence distillation is a basic information-theoretic task in the resource theory of coherence. In this talk, I will report the framework of the approximate coherence distillation under strictly inc...
Spectral spatial coherence of high-power multi-chip LEDs
Spectral spatial coherence high-power multi-chip LEDs
2012/8/18
We investigate the spatial coherence of the light generated from high-power multi-chip red LEDs by using the van Cittert-Zernike theorem. It is theoretically demonstrated that the light generated from...
Tight Focusing of Light Beams: Effect of Polarization, Phase, and Coherence
Tight Focusing Light Beams Effect of Polarization Phase Coherence
2012/7/3
The focusing theory of electromagnetic waves has been well developed. A scalar wave theory satisfactorily describes the focusing process for a small semi-aperture angle. However, the vectorial charact...
Quantum plasmonics: second-order coherence of surface plasmons launched by quantum emitters into a metallic film
Quantum plasmonics second-order coherence of surface plasmons quantum emitters Optics
2012/5/9
We address the issue of the second-order coherence of single surface plasmons launched by a quantum source of light into extended gold films. The quantum source of light is made of a scanning fluoresc...
Interplay between coherence and decoherence in LHCII photosynthetic complex
LHCII photosynthetic complex
2011/8/10
This paper investigates the dynamics of excitonic transport in photocomplex LHCII, the primary component of the photosynthetic apparatus in green plants. The dynamics exhibits a strong interplay betwe...
Observation of Superfluorescence from a Spontaneous Coherence of Excitons in ZnTe Crystal: Evidence for Bose-Einstein Condensation of Excitons?
Superfluorescence Spontaneous Coherence Excitons ZnTe Crystal Bose-Einstein Condensation
2011/7/26
Abstract: Superfluorescence (SF) is the emission from a dense coherent system in population inversion, formed from an initially incoherent ensemble. This is characterised by an induction time (t_D) fo...
Generating Molecular Rovibrational Coherence by Two-Photon Femtosecond Photoassociation of Thermally Hot Atoms
Generating Molecular Rovibrational Two-Photon Femtosecond Photoassociation Thermally Hot Atoms
2011/7/24
Abstract: The formation of diatomic molecules with rotational and vibrational coherence is demonstrated experimentally in free-to-bound two-photon femtosecond photoassociation of hot atoms. In a therm...
Theoretical study of Acousto-optical coherence tomography using random phase jumps on US and light
Acousto-optical random phase jumps coherence tomography
2011/6/24
Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous W...
Dynamic Stimulation of Quantum Coherence in Lattice Bosons
Dynamic Stimulation Quantum Coherence in Lattice Bosons
2010/11/12
Thermal fluctuations tend to destroy long-range phase correlations. Consequently, bosons in a lattice will undergo a transition from a phase-coherent superfluid as the temperature rises. Contrary to c...
Spin-orbit coupling and phase-coherence in InAs nanowires
Spin-orbit coupling phase-coherence InAs nanowires
2010/11/9
We investigated the magnetotransport of InAs nanowires grown by selective area metal-organic
vapor phase epitaxy. In the temperature range between 0.5 and 30 K reproducible fluctuations in the conduc...
The influence of temporal coherence on the dynamical Casimir effect
Casimir effect Quantum Physics temporal coherence
2010/11/8
We study the dynamical Casimir effect in the presence of a finite coherence time, which is associated with a finite quality factor of the optical cavity. We use the time refraction model, where a fixe...
Isoscalar dipole coherence at low energies and forbidden E1 strength
Isoscalar dipole coherence low energies forbidden E1 strength
2010/11/4
In 16O and 40Ca an isoscalar, low-energy dipole transition (IS-LED) exhausting approximately 4% of the isoscalar dipole (ISD) energy-weighted sum rule is experimentally known, but conspicuously absent...
Coherence and Optical Emission from Bilayer Exciton Condensates
Coherence Optical Emission Bilayer Exciton Condensates
2010/11/1
Experiments aimed at demonstrating Bose-Einstein condensation of excitons in two types of experiments with bilayer structures (coupled quantum wells) are reviewed,with an emphasis on the basic e ects....
Thermally induced coherence in a Mott insulator of bosonic atoms
Thermally induced coherence Mott insulator of bosonic atoms
2010/11/1
Conventional wisdom is that increasing temperature causes quantum coherence to decrease. Using finite temperature perturbation theory and exact calculations for the strongly correlated bosonic Mott in...
The drop of the coherence of the lower kHz QPOs is also observed in XTE J1701-462
accretion accretion disks stars individual XTE J1701–462
2010/11/1
We investigate the quality factor and RMS amplitude of the lower kHz QPOs from XTE J1701–462 a unique X-ray source which was observed in both the so-called Z and atoll states.