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17.10.+n Nanotubes and nanowires

Synthetic gauge fields in synthetic dimensions: Interactions and chiral edge modes

Mon, 2016-05-30 23:41 - Davide Rossini
Date: 
2016-03-11
Author(s): 

Simone Barbarino, Luca Taddia, Davide Rossini, Leonardo Mazza, and Rosario Fazio

Reference: 

New J. Phys. 18, 035010 (2016)

URL: 

http://iopscience.iop.org/article/10.1088/1367-2630/18/3/035010/meta

Synthetic ladders realized with one-dimensional alkaline-earth(-like) fermionic gases and subject to a gauge field represent a promising environment for the investigation of quantum Hall physics with ultracold atoms. Using density-matrix renormalization group calculations, we study how the quantum Hall-like chiral edge currents are affected by repulsive atom-atom interactions. We relate the properties of such currents to the asymmetry of the spin resolved momentum distribution function, a quantity which is easily addressable in state-of-art experiments.

Two-photon transport through a waveguide coupling to a whispering gallery resonator containing an atom and photon-blockade effect

Tue, 2013-05-14 10:21 - Mattia Giardini
Date: 
2012-08-04
Author(s): 

T. Shi, Shanhui Fan

Reference: 

arXiv:1208.1258v1

URL: 

http://arxiv.org/abs/1208.1258

We investigate the two-photon transport through a waveguide side-coupling to a whispering-gallery-atom system. Using the Lehmann-Symanzik-Zimmermann (LSZ) reduction approach, we present the general formula for the two-photon processes including the two-photon scattering matrices, the wavefunctions and the second order correlation functions of the out-going photons.

Self-organization of atoms along a nanophotonic waveguide

Tue, 2013-05-14 10:08 - Mattia Giardini
Date: 
2013-03-15
Author(s): 

D.E. Chang, J.I. Cirac, H.J. Kimble

Reference: 

URL: http://link.aps.org/doi/10.1103/PhysRevLett.110.113606
DOI: 10.1103/PhysRevLett.110.113606
PACS: 42.50.Wk, 37.10.Jk

Atoms coupled to nanophotonic interfaces represent an exciting frontier for the investigation of quantum light-matter interactions. While most work has considered the interaction between statically positioned atoms and light, here we demonstrate that a wealth of phenomena can arise from the self-consistent interaction between atomic internal states, optical scattering, and atomic forces.

Crystal Phase Quantum Dots

Mon, 2011-02-14 18:30 - Daniel Rudolph
Date: 
2010-03-05
Author(s): 

N. Akopian, G. Patriarche, L. Liu, J.-C. Harmand and V. Zwiller

Reference: 

Nano Lett., 2010, 10 (4), pp 1198–1201

URL: 

http://pubs.acs.org/doi/abs/10.1021/nl903534n

In semiconducting nanowires, both zinc blende and wurtzite crystal structures can coexist. The band structure difference between the two structures can lead to charge confinement. Here we fabricate and study single quantum dot devices defined solely by crystal phase in a chemically homogeneous nanowire and observe single photon generation.

Surround-gated vertical nanowire quantum dots

Mon, 2011-02-14 17:25 - Daniel Rudolph
Date: 
2010-06-11
Author(s): 

M. H. M. van Weert, M. den Heijer, M. P. van Kouwen, R. E. Algra, E. P. A. M. Bakkers, L. P. Kouwenhoven1, and V. Zwiller

Reference: 

Appl. Phys. Lett. 96, 233112 (2010)

URL: 

http://link.aip.org/link/doi/10.1063/1.3452346

We report voltage dependent photoluminescence experiments on single indium arsenide phosphide (InAsP) quantum dots embedded in vertical surround-gated indium phosphide (InP) nanowires. We show that by tuning the gate voltage, we can access different quantum dot charge states. We study the anisotropic exchange splitting by polarization analysis, and identify the neutral and singly charged exciton. These results are important for spin addressability in a charge tunable nanowire quantum dot.

 

Single quantum dot nanowire photodetectors

Mon, 2011-02-14 17:16 - Daniel Rudolph
Date: 
2010-09-16
Author(s): 

M. P. van Kouwen, M. H. M. van Weert, M. E. Reimer, N. Akopian, U. Perinetti, R. E. Algra, E. P. A. M. Bakkers, L. P. Kouwenhoven, and V. Zwiller

Reference: 

Appl. Phys. Lett. 97, 113108 (2010)

URL: 

http://link.aip.org/link/doi/10.1063/1.3484962

Bosonization of one dimensional fermions out of equilibrium

Tue, 2010-10-05 13:11 - Ingo Kamleitner
Date: 
2010-02-24
Author(s): 

D. Gutman, Y. Gefen, and A. Mirlin

Reference: 

Phys. Rev. B 81, 085436 (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevB.81.085436

Bosonization technique for one-dimensional fermions out of equilibrium is developed in the framework of the Keldysh action formalism. We first demonstrate how this approach is implemented for free fermions and for the problem of nonequilibrium Fermi edge singularity. We then employ the technique to study an interacting quantum wire attached to two electrodes with arbitrary energy distributions.

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