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Acta Physica Polonica A

Long-range Interactions for the A31uand B30+uStates of Cd2from Line Shape Measurements

T. Grycuk, Marta Michalicka, J. Rogaczewski

Published Jun 1, 2002• 10 citations
Publisher

Abstract

eri ment al Ph ysi cs, W arsaw Uni versi ty Ho âa 69, 00-681 W arszawa, Pol an d b G ra m mar School No 3, Conra da 6, 01-922 W arszawa, Pol and c Insti tute of Physi cs, W arsaw Uni versi ty of Technol ogy Ko szykowa 75, 00-662 W arszawa, Po l and ( Recei ved Febr uar y 19, 2002) W e rep or t on ver y pre cise measurements of t he absorption pro Ùle of the 326.1 nm resonance line of cadmium broadened by interactions w ith the ground state C d atoms under thermal equilib riu m.T he exp erimental

DOI
10.12693/aphyspola.101.825

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eri ment al Ph ysi cs, W arsaw Uni versi ty Ho âa 69, 00-681 W arszawa, Pol an d b G ra m mar School No 3, Conra da 6, 01-922 W arszawa, Pol and c Insti tute of Physi cs, W arsaw Uni versi ty of Technol ogy Ko szykowa 75, 00-662 W arszawa, Po l and ( Recei ved Febr uar y 19, 2002) W e rep or t on ver y pre cise measurements of t he absorption pro Ùle of the 326.1 nm resonance line of cadmium broadened by interactions w ith the ground state C d atoms under thermal equilib riu m.T he exp erimental
Po land b Facul ty of Physi cs, W arsaw Uni versi ty of T echnology Ko szyko wa 75, 00-662 W arszawa, Po l and ( Recei ved December 10, 2003) In t his work w e present results of calcula tion s concernin g bistabil it y of optical polarisati on in biref ringen t me dia .Second -order optical nonlin eari ty is assumed to be dominant and represented by one parameter.In our mo del the second-harmoni c generation regime is assumed.Light transmission is analysed in terms of standard F abry { Perot mo del of feedback.W e deri ved formulas for the Stokes parameters describin g the polaris atio n state.N umerical results show ed that three parameters may exhibit bistable behaviour.T his creates new possibi li tie s for optical switching.
c h a and K. R z¨âew ski b a I nst i t ut e of E xp eri m ental P hysi cs, Opti cs D i vi sion W arsaw Uni versi ty , Hoâa 69, 00-681 W arsaw, Pol an d b Center for Theo reti cal Physi cs, Pol ish Aca dem y of Sciences al .Lo tni k §w 32/ 46, 02-668 W arsaw, Po l and W e st udy an ult ra cold dilute gas of bosonic ato ms in an optical lattice induced by intersecting laser b eams.A s a Ùrst appro ximation w e neglect conÙning p otential and atom {atom interactions.In t his case the Gross{ Pitae vs ki j equation reduces to simple Mathieu equation.U pon cho osing p erio dic boundary conditions this problem has well know n perio dic solution.T his simple picture allow s to demonstrate lo cali zation of the w ave packet and formation of the band structure.W e calcula te spectrum of the excited states as a function of the strength of mo dulati ng p otential and using a standard adiabatici ty criterion w e predict the most e£cient w ay to ramp up optical lattice , w ithout higher state excitation.Finall y, we discuss the in Ûuence of the atom{atom interaction (nonlinea rity ) on the adiabatic ity of the pro cess.