Tunneling-Induced Spectral Broadening of a Single Atom in a Three-Dimensional Optical Lattice

Kim, Wookrae; Park, Changwon; Kim, Jung Ryul; Choi, Youngwoon; Kang, Sungsam; Lim, Sooin; Lee, Yea Lee; Ihm, Jisoon; An, Kyungwon

doi:10.1021/nl103858x

Cited by 12 publications

(21 citation statements)

References 33 publications

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“…Therefore, MMTDC is more efficient than SMTDC, which uses only one start photon event, by this factor of N 0 1. Owing to this high efficiency, MMTDC has been successfully employed in the first observation of non-classical radiation [5] and quantum frequency pulling [6] in the cavity-QED microlaser and the spectrum of a single atom localized in an optical lattice [7].…”

Section: Introductionmentioning

confidence: 99%

Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

et al. 2015

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Exact measurement of the second-order correlation function g (2) (t) of a light source is essential when investigating the photon statistics and the light generation process of the source. For a stationary single-mode light source, Mandel Q factor is directly related to g (2) (0). For a large mean photon number in the mode, the deviation of g (2) (0) from unity is so small that even a tiny error in measuring g (2) (0) would result in an inaccurate Mandel Q. In this work, we have found that detector dead time can induce a serious error in g (2) (0) and thus in Mandel Q in those cases even in a two-detector configuration. Our finding contradicts the conventional understanding that detector dead time would not affect g (2) (t) in two-detector configurations. Utilizing the cavity-QED microlaser, a well-established sub-Poissonian light source, we measured g (2) (0) with two different types of photodetectors with different dead time. We also introduced prolonged dead time by intentionally deleting the photodetection events following a preceding one within a specified time interval. We found that the observed Q of the cavity-QED microlaser was underestimated by 19% with respect to the dead-time-free Q when its mean photon number was about 600. We derived an analytic formula which well explains the behavior of the g (2) (0) as a function of the dead time.

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Section: Introductionmentioning

confidence: 99%

Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

et al. 2015

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“…Moreover, in contrast to solids, where the lattice spacings are generally of order of Angstrom units, the lattice constants in optical lattices are typically three order of magnitude larger. Furthermore, variety of multi-dimensional lattices can be experimentally obtained by appropriate setup of laser beams including cubic face-centered and body-centered lattices [4,5]. For example, a three dimensional (3D) lattice can be created by the interference of at least six orthogonal sets of counter propagating laser beams.…”

Section: Introductionmentioning

confidence: 99%

Finite temperature superfluid transition of strongly correlated lattice bosons in various geometries

Zaleski¹,

Kopeć²

2015

Physica B: Condensed Matter

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We study finite-temperature properties of the strongly interacting bosons in three-dimensional lattices by employing the combined Bogoliubov method and the quantum rotor approach. Based on the mapping of the Bose-Hubbard Hamiltonian of strongly interacting bosons onto U(1) phase action, we study their thermodynamic phase diagrams for several lattice geometries including; simple cubic, body-as well as face-centered lattices. The quantitative values for the phase boundaries obtained here may be used as a reference for emulation of the Bose-Hubbard model on a variety of optical lattice structures in order to demonstrate experimental-theoretical consistency for the numerical values regarding the location of the critical points.

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“…Nonetheless, a single neutral atom was tightly localized in an optical lattice in the Lamb–Dicke regime 9,10 and its spectrum was observed to determine its inter-potential-well tunnelling rate 11 . An intracavity dipole trap was used to confine a single neutral atom near an antinode for maximum atom–cavity interaction while heating effects induced uncertain atomic delocalization 12 .…”

mentioning

confidence: 99%

Three-dimensional imaging of cavity vacuum with single atoms localized by a nanohole array

et al. 2014

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Zero-point electromagnetic fields were first introduced to explain the origin of atomic spontaneous emission. Vacuum fluctuations associated with the zero-point energy in cavities are now utilized in quantum devices such as single-photon sources, quantum memories, switches and network nodes. Here we present three-dimensional (3D) imaging of vacuum fluctuations in a high-Q cavity based on the measurement of position-dependent emission of single atoms. Atomic position localization is achieved by using a nanoscale atomic beam aperture scannable in front of the cavity mode. The 3D structure of the cavity vacuum is reconstructed from the cavity output. The root mean squared amplitude of the vacuum field at the antinode is also measured to be 0.92 ± 0.07 V cm −1. The present work utilizing a single atom as a probe for sub-wavelength imaging demonstrates the utility of nanometre-scale technology in cavity quantum electrodynamics.

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Tunneling-Induced Spectral Broadening of a Single Atom in a Three-Dimensional Optical Lattice

Cited by 12 publications

References 33 publications

Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

Correction for the detector-dead-time effect on the second-order correlation of stationary sub-Poissonian light in a two-detector configuration

Finite temperature superfluid transition of strongly correlated lattice bosons in various geometries

Three-dimensional imaging of cavity vacuum with single atoms localized by a nanohole array

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