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Controlling a mesoscopic spin environment by quantum bit manipulation.
Taylor JM, Imamoglu A, Lukin MD. Taylor JM, et al. Phys Rev Lett. 2003 Dec 12;91(24):246802. doi: 10.1103/PhysRevLett.91.246802. Epub 2003 Dec 10. Phys Rev Lett. 2003. PMID: 14683144
We present a unified description of cooling and manipulation of a mesoscopic bath of nuclear spins via coupling to a single quantum system of electronic spin (quantum bit). We show that a bath cooled by the quantum bit rapidly saturates. Although the r …
We present a unified description of cooling and manipulation of a mesoscopic bath of nuclear spins via coupling to a si …
Nonlinear optics and quantum entanglement of ultraslow single photons.
Lukin MD, Imamoglu A. Lukin MD, et al. Phys Rev Lett. 2000 Feb 14;84(7):1419-22. doi: 10.1103/PhysRevLett.84.1419. Phys Rev Lett. 2000. PMID: 11017532
Two light pulses propagating with slow group velocities in a coherently prepared atomic gas exhibit dissipation-free nonlinear coupling of an unprecedented strength. This enables a single-photon pulse to coherently control or manipulate the quantum state of the othe …
Two light pulses propagating with slow group velocities in a coherently prepared atomic gas exhibit dissipation-free nonlinear coupli …
Stimulated scattering of indirect excitons in coupled quantum wells: signature of a degenerate Bose-gas of excitons.
Butov LV, Ivanov AL, Imamoglu A, Littlewood PB, Shashkin AA, Dolgopolov VT, Campman KL, Gossard AC. Butov LV, et al. Phys Rev Lett. 2001 Jun 11;86(24):5608-11. doi: 10.1103/PhysRevLett.86.5608. Phys Rev Lett. 2001. PMID: 11415313
Our main result--a strong enhancement of the exciton scattering rate to the low-energy states with increasing concentration of the indirect excitons--reveals bosonic stimulation of exciton scattering, which is a signature of a degenerate Bose-gas of excitons. …
Our main result--a strong enhancement of the exciton scattering rate to the low-energy states with increasing concentration of the in …
Controlling photons using electromagnetically induced transparency.
Lukin MD, Imamoğlu A. Lukin MD, et al. Nature. 2001 Sep 20;413(6853):273-6. doi: 10.1038/35095000. Nature. 2001. PMID: 11565022
It is well known that a dielectric medium can be used to manipulate properties of light pulses. However, optical absorption limits the extent of possible control: this is especially important for weak light pulses. ...Theoretical and experimental work has demonstrated that …
It is well known that a dielectric medium can be used to manipulate properties of light pulses. However, optical absorption limits th …
Optical pumping of quantum-dot nuclear spins.
Imamoglu A, Knill E, Tian L, Zoller P. Imamoglu A, et al. Phys Rev Lett. 2003 Jul 4;91(1):017402. doi: 10.1103/PhysRevLett.91.017402. Epub 2003 Jul 3. Phys Rev Lett. 2003. PMID: 12906573
Hyperfine interactions with randomly oriented nuclear spins present a fundamental decoherence mechanism for electron spin in a quantum dot, that can be suppressed by polarizing the nuclear spins. ...
Hyperfine interactions with randomly oriented nuclear spins present a fundamental decoherence mechanism for electron spin in a
Laser cooling of a nanomechanical resonator mode to its quantum ground state.
Wilson-Rae I, Zoller P, Imamoğlu A. Wilson-Rae I, et al. Phys Rev Lett. 2004 Feb 20;92(7):075507. doi: 10.1103/PhysRevLett.92.075507. Epub 2004 Feb 20. Phys Rev Lett. 2004. PMID: 14995872
We show that it is possible to cool a nanomechanical resonator mode to its ground state. The proposed technique is based on resonant laser excitation of a phonon sideband of an embedded quantum dot. ...
We show that it is possible to cool a nanomechanical resonator mode to its ground state. The proposed technique is based on resonant …
Enhancement of electron spin coherence by optical preparation of nuclear spins.
Stepanenko D, Burkard G, Giedke G, Imamoglu A. Stepanenko D, et al. Phys Rev Lett. 2006 Apr 7;96(13):136401. doi: 10.1103/PhysRevLett.96.136401. Epub 2006 Apr 3. Phys Rev Lett. 2006. PMID: 16712008
We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excitation and photon detection. ...We use a Lindblad equation to describe the driven system under photon emission and detection. Numerica …
We study a large ensemble of nuclear spins interacting with a single electron spin in a quantum dot under optical excit …
Knight-field-enabled nuclear spin polarization in single quantum dots.
Lai CW, Maletinsky P, Badolato A, Imamoglu A. Lai CW, et al. Phys Rev Lett. 2006 Apr 28;96(16):167403. doi: 10.1103/PhysRevLett.96.167403. Epub 2006 Apr 28. Phys Rev Lett. 2006. PMID: 16712275
We demonstrate dynamical nuclear-spin polarization in the absence of an external magnetic field by resonant circularly polarized optical excitation of a single electron or hole charged quantum dot. ...Our experiments constitute a first step towards a quantum …
We demonstrate dynamical nuclear-spin polarization in the absence of an external magnetic field by resonant circularly polarized optical exc …
Strong extinction of a far-field laser beam by a single quantum dot.
Vamivakas AN, Atatüre M, Dreiser J, Yilmaz ST, Badolato A, Swan AK, Goldberg BB, Imamoglu A, Unlü MS. Vamivakas AN, et al. Nano Lett. 2007 Sep;7(9):2892-6. doi: 10.1021/nl0717255. Epub 2007 Aug 11. Nano Lett. 2007. PMID: 17691853
Through the utilization of index-matched GaAs immersion lens techniques, we demonstrate a record extinction (12%) of a far-field focused laser beam by a single InAs/GaAs quantum dot. This contrast level enables us to report for the first time resonant laser t …
Through the utilization of index-matched GaAs immersion lens techniques, we demonstrate a record extinction (12%) of a far-fie …
Dynamics of quantum dot nuclear spin polarization controlled by a single electron.
Maletinsky P, Badolato A, Imamoglu A. Maletinsky P, et al. Phys Rev Lett. 2007 Aug 3;99(5):056804. doi: 10.1103/PhysRevLett.99.056804. Epub 2007 Aug 2. Phys Rev Lett. 2007. PMID: 17930778
We present measurements of the buildup and decay of nuclear spin polarization in a single semiconductor quantum dot. Our experiment shows that we polarize the nuclei in a few milliseconds, while their decay dynamics depends drastically on external parameters. ...Thi …
We present measurements of the buildup and decay of nuclear spin polarization in a single semiconductor quantum dot. Our experiment s …
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