Optical lattice standing wave

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August undefined, 2024

Webtable of contents list of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii list of tables ... WebRecently, new classes of optical lattices were identified, permitting the creation of arbitrarily large two- and three-dimensional arrays of tightly confined excitation maxima of controllable periodicity and polarization from the superposition of a finite set of plane waves.

[0711.1772] Bloch oscillation of a Bose-Einstein condensate in a ...

WebApr 1, 2024 · Figure 1. Superresolution imaging of ultracold atoms based on optical pumping. (a) Given an intense standing wave of OP light, the excitation probability (red … WebAug 9, 2024 · When the distance L between BECs and mirror and laser frequency f are fixed, we can realize the misplacement of d/4 of the two sets of standing wave optical lattices by adjusting the frequency difference δf. Because δf ≪ f, the lattice constants of the two lattices can be regarded as the same. citizenship application customer service

Lecture 12: Lattice vibrations - University of Cambridge

WebOptical Lattices. Last day we talked about the presence of "bandstructure" in solids. Namely the eigenstates for electrons in crystals "bunch up." ... ^2.$ Thus a standing wave of light will produce a potential. Lets specialize to the potential you get when you aim two lasers in opposite dicrections: \begin{equation} E = E_0{\rm Real}\left[e^{i ... Webwave is standing and therefore the transmission velocity for the energy is zero. (iii) Long wavelength limit. ... The distinction between the acoustic and optical branches of lattice vibrations can be seen most clearly by comparing them at q=0 (infinite wavelength). As follows from Eq.(5.15), for the acoustic branch ... WebWe describe a method to generate a synthetic gauge potential for ultracold atoms held in an optical lattice. Our approach uses a time-periodic driving potential based on quickly alternating two Hamiltonians to engineer the appropriate Aharonov-Bohm phases, and permits the simulation of a uniform tunable magnetic field. We explicitly demonstrate that … citizenship application checklist form

(PDF) Bose-Einstein condensates in time-dependent light …

Section 5: Lattice Vibrations - University of Nebraska–Lincoln

Webstanding wave has the form V lat (x) = V 0 sin2(k L x), where k L = 2π/λ L is the wave vector of the laser light used to form the optical standing wave and V 0 represents the lattice … WebApr 4, 2024 · In recent years, III–V semiconductor nanowires have been widely investigated for infrared photodetector applications due to their direct and suitable bandgap, unique optical and electrical properties, flexibility in device design and to create heterostructures, and/or grow on a foreign substrate such as Si with more effective strain relaxation … dick finneyWebJan 1, 2012 · Optical Lattices Periodic potentials based on dipole forces can be formed via optical interference by overlapping two laser beams. For the case of two counterpropagating light fields, an optical standing wave with period alat = λ /2 is formed, in which the atoms can be trapped. citizenship application eligibility canada

"WebStanding-wave laser fields produce a periodic potential for atoms, which can trap cold atoms in an ordered crystallike structure. 1 In most optical lattices studied so far, the light is tuned close to a resonance, so that spontaneous emission limits the atomic coherence time. " - Optical lattice standing wave

Optical lattice standing wave

WebCooling in Optical Lattices. Quantum Computation Using Optical Lattices. Ben Zaks. Victor Acosta. Physics 191. Prof. Whaley. UC-Berkeley. Contents Standing Wave Light Field Egg … WebAug 25, 2010 · Abstract. We investigate a setup where a cloud of atoms is trapped in an optical lattice potential of a standing-wave laser field which is created by retroreflection on a micromembrane. The membrane vibrations itself realize a quantum mechanical degree of freedom. We show that the center-of-mass mode of atoms can be coupled to the …

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http://info.phys.unm.edu/~ideutsch/Publications/Optical_Lattice_Review.pdf WebJul 5, 2013 · The basic principle of optical lattices relies on the optical dipole force: when neutral atoms are subjected to an ac electric field, this field dynamically induces a polarization into the atom. The induced dipole moment, in turn, interacts with the electric field and a force is exerted onto the atom.

WebMar 18, 2008 · We report an experimental method to create optical lattices with real-time control of their periodicity. We demonstrate a continuous change of the lattice periodicity … WebJun 9, 2024 · The two types of optical clocks with the highest performance are optical lattice clocks that confine neutral atoms in the standing wave field of intense laser beams, and ion clocks that typically confine a single ion in an electric field. Within the field of time and frequency metrology, these clocks are most accurately described as “optical ...

WebNov 13, 2024 · We experimentally and numerically study the localization transition in the ground state of noninteracting and weakly interacting bosons in an eightfold symmetric quasicrystalline optical lattice. In contrast to typically used real space in situ techniques, we probe the system in momentum space by recording matter wave diffraction patterns. WebApr 25, 2011 · A suitable optical lattice for cold atoms could produce a large effective magnetic field in which the atoms would realize analogs to quantum Hall states. Figure 1:The accumulation of phase as a spin- 1 / 2 particle moves through an inhomogeneous (quadrupole) magnetic field.

WebFeb 21, 2024 · With the aid of spatial atomic density and standing wave modulation, both the optical PT symmetry and PT antisymmetry are achieved in one-dimensional and two-dimensional optical lattices, where the PT antisymmetry with the gain is presented.

WebWe show that even when the optical standing wave is slowly turned on and the condensate behaves adiabatically during this turn-on, once the tunneling- time between wells in the optical lattice becomes longer than the nonlinear time-scale, adiabaticity breaks down and a significant spatially varying phase develops across the condensate wave ... citizenship application english testWebWe first consider a general class oftwo-mode nonlinear systems - relevant to optical Kerr cavities, waveguides andBose-Einstein condensates - where we find an emergent four-wave mixingnonlinearity, which originates from pair-hopping processes in … citizenship application english requirementsWebMar 25, 2024 · After it there is an optical lens with a focal length f = 300 mm. The standing wave is formed by the back reflection of the laser beam without polarization rotation from … citizenship application fee 2022 canadaWebIn this Letter, we show that a three-dimensional Bose-Einstein solitary wave can become stable if the dispersion law is changed from quadratic to quartic. We suggest a way to realize the quartic dispersion, using shake… dick finnegan stay interviews dick fischer obituaryWebNov 24, 2014 · Recently, optical trapping of a single ion has been demonstrated, first in a single-beam dipole trap, superimposed by a static electric potential 34, 35. Subsequently, all-optical trapping of... dick findlay artistWebOptical lattices are periodic arrays of microtraps for cold atoms generated by standing wave laser fields. The periodic structure of the lattice gives rise to a series of Bloch bands for the atomic center-of-mass motion. Atoms loaded in an optical lattice from a BEC will only occupy the lowest Bloch band due to the low temperatures. The physics of these atoms … citizenship application fee for low income