Zobrazeno 1 - 10
of 173
pro vyhledávání: '"Steel, D. G."'
Autor:
Schaibley, J. R., Burgers, A. P., McCracken, G. A., Duan, L. -M., Berman, P. R., Steel, D. G., Bracker, A. S., Gammon, D., Sham, L. J.
The electron spin state of a singly charged semiconductor quantum dot has been shown to form a suitable single qubit for quantum computing architectures with fast gate times. A key challenge in realizing a useful quantum dot quantum computing archite
Externí odkaz:
http://arxiv.org/abs/1210.5555
Autor:
Kim, Erik D., Truex, Katherine, Xu, Xiaodong, Sun, Bo, Steel, D. G., Bracker, A. S., Gammon, D., Sham, L. J.
We demonstrate optical control of the geometric phase acquired by one of the spin states of an electron confined in a charge-tunable InAs quantum dot via cyclic 2pi excitations of an optical transition in the dot. In the presence of a constant in-pla
Externí odkaz:
http://arxiv.org/abs/0910.5189
Publikováno v:
Phys. Rev. A 83, 053833 (2011)
In coherent control, electromagnetic vacuum fluctuations usually cause coherence loss through irreversible spontaneous emission. However, since the dissipation via emission is essentially due to correlation of the fluctuations, when emission ends in
Externí odkaz:
http://arxiv.org/abs/0909.4005
Autor:
Kim, Erik D., Smirl, Katherine, Wu, Yanwen, Amo, A., Xu, Xiaodong, Steel, D. G., Bracker, A. S., Gammon, D., Sham, L. J.
We demonstrate the all-optical ultrafast manipulation and read-out of optical transitions in a single negatively charged self-assembled InAs quantum dot, an important step towards ultrafast control of the resident spin. Experiments performed at zero
Externí odkaz:
http://arxiv.org/abs/0905.0297
Autor:
Xu, Xiaodong, Sun, Bo, Kim, Erik D., Smirl, Katherine, Berman, P. R., Steel, D. G., Bracker, A. S., Gammon, D., Sham, L. J.
We investigate a singly-charged quantum dot under a strong optical driving field by probing the system with a weak optical field. When the driving field is detuned from the trion transition, the probe absorption spectrum is shifted from the trion res
Externí odkaz:
http://arxiv.org/abs/0803.0734
Publikováno v:
Phys. Rev. B 78, 235314 (2008)
We present an adiabatic approach to the design of entangling quantum operations with two electron spins localized in separate InAs/GaAs quantum dots via the Coulomb interaction between optically-excited localized states. Slowly-varying optical pulses
Externí odkaz:
http://arxiv.org/abs/0802.1527
Publikováno v:
Phys. Rev. B 77, 115315 (2008)
High-resolution spectral hole burning (SHB) in coherent nondegenerate differential transmission spectroscopy discloses spin-trion dynamics in an ensemble of negatively charged quantum dots. In the Voigt geometry, stimulated Raman spin coherence gives
Externí odkaz:
http://arxiv.org/abs/0707.1726
Publikováno v:
Physical Review B 75, 085322 (2007)
We study in theory the generation and detection of electron spin coherence in nonlinear optical spectroscopy of semiconductor quantum dots doped with single electrons. In third-order differential transmission spectra, the inverse width of the ultra-n
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610075
Publikováno v:
Phys. Rev. Lett. 98, 047401 (2007)
We consider the initialization of the spin-state of a single electron trapped in a self-assembled quantum dot via optical pumping of a trion level. We show that with a magnetic field applied perpendicular to the growth direction of the dot, a near-un
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608225
Autor:
Dutt, M. V. Gurudev, Cheng, Jun, Li, Bo, Xu, Xiaodong, Li, Xiaoqin, Berman, P. R., Steel, D. G., Bracker, A. S., Gammon, D., Economou, Sophia E., Liu, Ren-Bao, Sham, L. J.
Publikováno v:
Phys. Rev. Lett. 94, 227403 (2005)
We report on the coherent optical excitation of electron spin polarization in the ground state of charged GaAs quantum dots via an intermediate charged exciton (trion) state. Coherent optical fields are used for the creation and detection of the Rama
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504039