Atomic-scale structure formed through the Stark shift by opposing beams of light
An optical lattice is formed by the interference of counter-propagating laser beams, creating a spatially periodic polarization pattern. The resulting periodic potential may trap neutral atoms via the Stark shift.[1] Atoms are cooled and congregate at the potential extrema (at maxima for blue-detuned lattices, and minima for red-detuned lattices). The resulting arrangement of trapped atoms resembles a crystal lattice[2] and can be used for quantum simulation.
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.[3] However, a superfluid–Mott insulator transition[4] 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 to the electrons in an insulator. In the case of fermionic atoms, if the well depth is further increased the atoms are predicted to form an antiferromagnetic, i.e. Néel state at sufficiently low temperatures.[5]
^Grimm, Rudolf; Weidemüller, Matthias; Ovchinnikov, Yurii B. (2000), "Optical Dipole Traps for Neutral Atoms", Advances In Atomic, Molecular, and Optical Physics, Elsevier, pp. 95–170, arXiv:physics/9902072, doi:10.1016/s1049-250x(08)60186-x, ISBN 978-0-12-003842-8, S2CID 16499267, retrieved 2020-12-17
^Bloch, Immanuel (October 2005). "Ultracold quantum gases in optical lattices". Nature Physics. 1 (1): 23–30. Bibcode:2005NatPh...1...23B. doi:10.1038/nphys138. S2CID 28043590.
^Gebhard, Florian (1997). The Mott metal-insulator transition models and methods. Berlin [etc.]: Springer. ISBN 978-3-540-61481-4.
^Greiner, Markus; Mandel, Olaf; Esslinger, Tilman; Hänsch, Theodor W.; Bloch, Immanuel (January 3, 2002). "Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms". Nature. 415 (6867): 39–44. Bibcode:2002Natur.415...39G. doi:10.1038/415039a. PMID 11780110. S2CID 4411344.
^Koetsier, Arnaud; Duine, R. A.; Bloch, Immanuel; Stoof, H. T. C. (2008). "Achieving the Néel state in an optical lattice". Phys. Rev. A. 77 (2): 023623. arXiv:0711.3425. Bibcode:2008PhRvA..77b3623K. doi:10.1103/PhysRevA.77.023623. S2CID 118519083.
An opticallattice is formed by the interference of counter-propagating laser beams, creating a spatially periodic polarization pattern. The resulting...
December 2012. In 2013 opticallattice clocks (OLCs) were shown to be as good as or better than caesium fountain clocks. Two opticallattice clocks containing...
known as a related quantity, magic frequency) is the wavelength of an opticallattice where the polarizabilities of two atomic clock states have the same...
both acoustic and optical phonons. A phonon is the quantum mechanical description of an elementary vibrational motion in which a lattice of atoms or molecules...
resolution, which means the clock "ticks" faster. Optical clocks use either a single ion, or an opticallattice with 104–106 atoms. A definition based on the...
an atom. This scheme can be performed in simple optical molasses or in molasses where an opticallattice has been superimposed, which are called respectively...
for having invented the magic wavelength technique for ultra precise opticallattice atomic clocks. Since 2011, Katori is also Chief Scientist at the Quantum...
briefly superseded by opticallattice clocks based on strontium-87 and ytterbium-171 until 2019. An experimental opticallattice clock was described in...
controller, a system controller that does not use feedback Opticallattice clock, a type of optical atomic clock The Oriental Land Company Search for "OLC"...
directly from the atomic interactions, without the need for an external opticallattice. This facilitated also the direct observation of superfluid flow and...
Hubbard model, two repulsive bosonic atoms can form a bound pair in an opticallattice. The JCH Hamiltonian also supports two-polariton bound states when...
Bloch is known for his work on atoms in artificial crystals of light, opticallattices, especially the first realization of a quantum phase transition from...
semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of...
considers quantum simulation and ultra cold atomic gases trapped in opticallattices. In 2021, she was awarded both the Alfried-Krupp-Förderpreis and Klung...
(PDF) on 2011-04-28 Wang, Yuanyuan (2012-07-12). "China unveils first optical clock". English News. Xinhuanet. Archived from the original on 2012-07-15...
[citation needed] In 2008 it was proposed that pairs of bosons in an opticallattice may be similar to Cooper pairs. The tendency for all the Cooper pairs...
dissertation titled "Quantum And Classical Dynamics Of Atoms In A Magneto‐opticalLattice", which delved into the quantum chaotic behavior of atoms interacting...
internal states of neutral atoms trapped in an opticallattice or an array of dipole traps, i.e. optical tweezers) Quantum dot computer, spin-based (e...
atoms is carried out in optical molasses, in a magneto-optic trap atoms are allowed to occupy a 2D, near resonance lattice the lattice is changed adiabatically...
University of Tokyo measured the gravitational redshift of two strontium-87 opticallattice clocks. The measurement took place at Tokyo Skytree where the clocks...