Atoms trapped in the optical lattice may move due to quantum tunneling... -
optical lattice

Atoms trapped in the optical lattice may move due to quantum tunneling...

wikipedia - 07 Nov 2016
Atoms trapped in the optical lattice may move due to quantum tunneling, even if the potential well depth of the lattice points exceeds the kinetic energy of the atoms, which is similar to the electrons in a conductor. However, a superfluid–Mott insulator transition may occur, if the interaction energy between the atoms becomes larger than the hopping energy when the well depth is very large. In the Mott insulator phase, atoms will be trapped in the potential minima and cannot move freely, which is similar t
optical lattice

Coherent perfect absorption of nonlinear matter waves

Science Advances - 10 Aug 2018
Here, we consider an atomic BEC residing in a periodic potential, realized by an optical lattice. The superfluid nature of the BEC allows for tunneling between the wells, while interatomic collisions lead to an intrinsic nonlinearity. One of the wells ...
optical lattice

Quiet Lasers, Cool Science - 31 Jul 2018
For example, optical lattices are widely used in optical atomic clocks, phase transition experiments, quantum simulators, and work with cold molecules. The motion in each well is quantized in a classic particle-in-a-box situation. Spectral transitions ...
optical lattice

Viewpoint: Sharpening the Features of Optical Lattices

Physics - 20 Feb 2018
The physical mechanism underlying most optical lattices is the ac-Stark effect, in which laser light causes shifts in an atom's ground-state energy. In the standing-wave pattern created from two or more laser beams, this ac-Stark shift will vary with ...
optical lattice

Optical lattice clock shatters precision record - 19 Mar 2018
The new clock is located at the National Institute of Standards and Technology (NIST) in Boulder, Colorado and uses thousands of strontium atoms confined in a 3D optical lattice. A laser is used to excite an extremely stable, high-frequency transition ...
optical lattice

Viewpoint: Atoms Oscillate Collectively in Large Optical Lattice

Physics - 14 Feb 2018
Optical lattices are key elements in the effort to use ultracold atoms for quantum simulation, quantum computing, and atomic clocks. These lattices rely on light forces to precisely hold atoms in space and to individually control their internal states [1].
optical lattice

A Fermi-degenerate three-dimensional optical lattice clock

Science Magazine - 05 Oct 2017
Some of today's most advanced clocks are made up of large numbers of atoms lined up in a one-dimensional (1D) optical lattice. The numbers improve clock stability, but atomic interactions can limit accuracy. Campbell et al. loaded their fermionic ...
optical lattice

Portable optical lattice clock measures elevation - 27 Feb 2018
A portable optical lattice clock on a trailer has been used to measure elevation deep inside a mountain near the France-Italy border. Although this elevation measurement is not as precise as conventional geodetic methods, the experiment marks an ...
optical lattice

Quantum simulations with ultracold atoms in optical lattices

Science Magazine - 07 Sep 2017
Quantum simulation, a subdiscipline of quantum computation, can provide valuable insight into difficult quantum problems in physics or chemistry. Ultracold atoms in optical lattices represent an ideal platform for simulations of quantum many-body problems.
optical lattice

Viewpoint: A Boost in Precision for Optical Atomic Clocks

Physics - 05 Mar 2018
Their device, which is based on thousands of ultracold Sr atoms confined in a 3D optical lattice, surpasses the previous “best” optical clock [3] by a factor of 1.4 in precision. Given that clocks already have such astonishingly high levels of ...
optical lattice

Scientists create anti-laser for a condensate of ultracold atoms

Phys.Org - 16 Aug 2018
To catch the condensate, the scientists used a periodic optical trap formed by the intersection of two laser beams. A focused electron beam applied to the central cell of the lattice makes the atoms leak out from this cell. Atoms from neighboring cells ...
optical lattice

Synopsis: Atoms Put On a Bloch Party

Physics - 24 May 2018
Physicists have managed to observe this phenomenon in other systems, such as semiconductor heterostructures and optical lattices containing ultracold atoms. However, previous optical lattice studies have only been able to infer the oscillations from ...
optical lattice

To Boldly Go

Harvard Medical School - 19 Apr 2018
The team validated the new adaptive optics-lattice light sheet microscope on a variety of biological samples, much of it carried out through the laboratories of Kirchhausen and Sean Megason, HMS associate professor of systems biology. To make sense of ...
optical lattice

Ultrafast dissolution and creation of bonds in IrTe

Science Advances - 27 Jul 2018
The combined experimental FED and optical and theoretical DFT studies have uncovered surprising lattice dynamics reflecting nuclear motions strongly coupled with the electronic subsystem. The present work demonstrates that the ultrafast manipulation of ...

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