Quantum Fluctuations and Statistical Properties of Intense Polariton Waves

Moskalenko, S. A.; Rotaru, A. H.; Shvera, Yu. M.

doi:10.1007/978-1-4615-7341-8_42

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…They depend on the volume V, the driving field energy flow SL, and the frequency detuning Aw = w(k,) -wL. Our first results were published in [5,6].…”

Section: Introductionmentioning

confidence: 86%

“…In such a way we obtained the self-consistent set of the master and kinetic equations (3), (5) which determine the statistical properties of the interacting polaritons under the action of laser driving field and thermal bath. Instead of the master equation, employing the nondiagonal P-presentation on the coherent states la) and Ip) proposed by Drummond and Gardiner [9], we obtain the FPE for the quasiprobability P(<, q, t ) in the new variables < and q.…”

Section: Model Hamiltonian Master Equation For the Reduced Density Omentioning

confidence: 99%

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The Statistical Properties of the Coherently Excited Polariton Wave in a Small Volume Crystal

Moskalenko¹,

Rotaru²,

Shvera³

1990

Physica Status Solidi (b)

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A selfconsistent steady state solution is given of the Fokker-Planck equation for polaritons with wave vector ko and the kinetic equations for the scattered ones are found. The statistics of the coherently excited polaritons k , differs in a most general case from the pure coherent state. It depends on the crystallite volume the frequency detuning Aw between the polariton bare frequency w(k,) and the laser one wL, and the driving field energy flow S,. In the case of small values of the product V . S, polariton bunching takes place when Aw -= 0, and antibunching in the opposite case. Polariton squeezed states can arise in both the detuning cases.

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“…They depend on the volume V, the driving field energy flow SL, and the frequency detuning Aw = w(k,) -wL. Our first results were published in [5,6].…”

Section: Introductionmentioning

confidence: 86%

Section: Model Hamiltonian Master Equation For the Reduced Density Omentioning

confidence: 99%

The Statistical Properties of the Coherently Excited Polariton Wave in a Small Volume Crystal

Moskalenko¹,

Rotaru²,

Shvera³

1990

Physica Status Solidi (b)

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“…The critical power at which it is possible to observe these nonlinear phenomena is P % 640 Â 10 3 W/cm 2 . The exciton and biexciton densities are of order 10 16 cm À3 and 10 14 cm À3 , respectively. The upward switching time is t 4 % 2 Â 10 À12 s, the downward switching time is t 5 % 4 Â 10 À12 s, and the switching energy is of order 50 Â 10 À12 J.…”

Section: The Hamiltonian and The Basic Equationmentioning

confidence: 99%

“…These constants were introduced into the equations phenomenologically. Note that the equations were obtained strictly within the quantum theory of fluctuations and dissipation from the flux part of the respective Fokker-Planck equation [10]. The equation of motion of the component E of the electromagnetic field is equivalent to the wave equation…”

Section: The Hamiltonian and The Basic Equationmentioning

confidence: 99%

Dynamic Optical Bistability, Switching and Control of Self-Pulsations of Excitons and Biexcitons

Tronciu

Rotaru

1999

phys. stat. sol. (b)

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The β‐glucuronidase (GUS) gene is a widely used reporter gene in transgenic research. This study shows that although histochemical localisation of GUS activity may be very specific, differences in incubation conditions and tissue status can lead to artificial localisations that are independent of gene activity. The objective of the current studies was to evaluate the factors that affect the in‐situ localisation of β‐glucuronidase using transgenic tobacco plants as model tissues. The aspects considered include tissue size as well as and the addition of surfactants, vacuum infiltration and chemical fixatives. Transgenic tobacco plants exhibited variable staining patterns dependent on the size of tissue assayed and the treatments that affected the infiltration of substrate. A gradient of blue staining was observed in larger tissue pieces (10 mm2), where staining in central areas was light blue in contrast to edges, which stained deep indigo. More intense staining was associated with peripheral cell layers and regions adjacent to leaf veins. Thinner tissue strips incubated under similar conditions exhibited intense and even X‐Gluc staining. Addition of Triton X‐100 (1%) surfactant and vacuum infiltration (2 min) produced considerably quicker and more uniform staining (intense and consistent indigo blue colour) of the examined tissue after a 4 to 6‐h incubation. Chemical fixation of tissues before GUS assay resulted in quantitative and histochemical differences in enzyme activity that were dependent on the fixative type and duration. Quantitative measurements using the MUG fluorometric assay showed that Histochoice™ provided the highest retention of GUS activity, maintaining more than 80 and 50% of the activity after fixation for 15 and 30 min, respectively. Activity in decreasing order was obtained with paraformaldehyde, glutaraldehyde, ethanol and FAA. GUS activity was affected not only by the type of fixative, but also by the duration of fixation with longer fixation producing lower GUS activity. From the experiments performed it can be concluded that those treatments that enhance substrate penetration, i.e., the addition of surfactant and vacuum infiltration, improve the consistency and speed of X‐Gluc staining.

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“…Because the photons of laser radiation are coherent on this as: sumption, i t is necessary to have from the beginning coherent biexcitons. !I'hey can be formed by employing the two-laser-beam technique and the two-photon transition from the ground state of the crystal t o the biexciton one Employing the methods of Wang and Haken ["I, the conditionof laser generation due t o exciton-biexciton conversion were investigated [8]. The first results concerning the optical turbulence emergence in such processes were reported in [9 t o 111.…”

Section: Introductioumentioning

confidence: 99%

Periodic and Stochastic Self‐Pulsations in the System of Coherent Excitons, Photons, and Biexcitons

Moskalenko¹,

Rotaru²,

Zaloi³

1988

Physica Status Solidi (b)

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S. A. MOSKALENEO et al. : Periodic and Stochastic Self-Pulsations 401 phys. stat. sol. (b) 150, 401 (lB88) Subject classification: 71.36 and 78.20 Institute of Applied Physicrr, Academy of Sciences of the Moldavian S8R, Kiehiner')Possible appearance of quasiperiodic and chaotic self-pulsations in a system of coherent excitons and photons as well a~ in the processes of oneand two-photon exciton-biexciton conversions are established for the first time. In the last two cases the generalized Lorem equations are obtained. Lyapunov analysis of the stationary state stability and computer exporiments are made. The main bifurcations in the three considered systoms of quasiparticles are found.

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Quantum Fluctuations and Statistical Properties of Intense Polariton Waves

Cited by 5 publications

References 3 publications

The Statistical Properties of the Coherently Excited Polariton Wave in a Small Volume Crystal

The Statistical Properties of the Coherently Excited Polariton Wave in a Small Volume Crystal

Dynamic Optical Bistability, Switching and Control of Self-Pulsations of Excitons and Biexcitons

Periodic and Stochastic Self‐Pulsations in the System of Coherent Excitons, Photons, and Biexcitons

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