Quantum correlated light pulses from sequential superradiance of a condensate

Tașgın, Mehmet Emre; Oktel, M. Ö.; You, Li; Müstecaplıoğlu, Özgür E.

doi:10.1103/physreva.79.053603

Cited by 10 publications

(11 citation statements)

References 45 publications

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“…The phenomenon of optical superradiance is well known for atoms and molecules, being described in numerous publications (see., e.g., books [1][2][3]). Optical superradiance from Bose-Einstein condensed atoms has also been investigated [4]. There also exists spin superradiance produced by spin systems, such as nuclei [5][6][7][8] or magnetic molecules [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of quantum dot superradiance

Yukalov

Yukalova

2010

Phys. Rev. B

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The possibility of realizing the superradiant regime of electromagnetic emission by the assembly of quantum dots is considered. The overall dynamical process is analyzed in detail. It is shown that there can occur several qualitatively different stages of evolution. The process starts with dipolar waves triggering the spontaneous radiation of individual dots. This corresponds to the fluctuation stage, when the dots are not yet noticeably correlated with each other. The second is the quantum stage, when the dot interactions through the common radiation field become more important, but the coherence is not yet developed. The third is the coherent stage, when the dots radiate coherently, emitting a superradiant pulse. After the superradiant pulse, the system of dots relaxes to an incoherent state in the relaxation stage. If there is no external permanent pumping, or the effective dot interactions are weak, the system tends to a stationary state during the last stationary stage, when coherence dies out to a low, practically negligible, level. In the case of permanent pumping, there exists the sixth stage of pulsing superradiance, when the system of dots emits separate coherent pulses.

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Section: Introductionmentioning

confidence: 99%

Dynamics of quantum dot superradiance

Yukalov

Yukalova

2010

Phys. Rev. B

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“…Moreover, it includes spatial propagation effects, which are crucial for the thorough understanding of condensate superradiance [11] and were not included in Refs. [10,12].…”

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confidence: 99%

“…Due to the coherent nature of the condensate, successive Rayleigh scattering events are strongly correlated leading to collective superradiant behavior [9][10][11][12]. Moreover, as a result of the cigar shape of the condensate, the gain is largest when the scattered photons leave the condensate along its long axis, in the so-called endfire modes with momenta k ≈ ±k l e z and frequency ω ≈ ω l .…”

mentioning

confidence: 99%

Correlated directional atomic clouds via four-heterowave mixing

Buchmann¹,

Nikolopoulos²,

Zobay³

et al. 2010

Phys. Rev. A

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We investigate the coherence properties of pairs of counter-propagating atomic clouds, produced in superradiant Rayleigh scattering off atomic condensates. It is shown that these clouds exhibit long-range spatial coherence and strong nonclassical density cross-correlations, which make this scheme a promising candidate for the production of highly directional nonclassically correlated atomic pulses.Comment: 12 pages, 3 figure

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“…The coherent superpositions of vortices of different circulation quantum numbers, especially vortex-antivortex cases [28,29], yield interesting interference effects with potential applications [30,31], such as manipulating the chirality of twisted metal nano-structures [32]. Creation of matter-wave vortex states from a non-rotating BEC by two-photon Raman transition method under paraxial LG and Gaussian (G) pulse is well discussed in literature [27,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In these studies, matter-wave vortex is shown to acquire vorticity equal to the winding number of the LG beam.…”

Section: Creation Of Superposition Of Bec Vortex Statesmentioning

confidence: 99%

Interaction of atom with nonparaxial Laguerre-Gaussian beam: Forming superposition of vortex states in Bose-Einstein condensates

et al. 2016

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The exchange of orbital angular momentum (OAM) between paraxial optical vortex and a BoseEinstein condensate (BEC) of atomic gases is well known. In this paper, we develop a theory for the microscopic interaction between matter and an optical vortex beyond paraxial approximation.We show how superposition of vortex states of BEC can be created with a focused optical vortex.Since, the polarization or spin angular momentum (SAM) of the optical field is coupled with OAM of the field, in this case, these angular momenta can be transferred to the internal electronic and external center-of-mass (c.m.) motion of atoms provided both the motions are coupled. We propose a scheme for producing the superposition of matter-wave vortices using Gaussian and a focused Laguerre-Gaussian (LG) beam. We study how two-photon Rabi frequencies of stimulated Raman transitions vary with focusing angles for different combinations of OAM and SAM of optical states. We demonstrate the formation of vortex-antivortex structure and discuss interference of three vortex states in a BEC. * sonjoym@phy.iitkgp.ernet.in

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Quantum correlated light pulses from sequential superradiance of a condensate

Cited by 10 publications

References 45 publications

Dynamics of quantum dot superradiance

Dynamics of quantum dot superradiance

Correlated directional atomic clouds via four-heterowave mixing

Interaction of atom with nonparaxial Laguerre-Gaussian beam: Forming superposition of vortex states in Bose-Einstein condensates

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