Automatic stabilizer - Revision history

en>BD2412: /* Induced taxes */Fixing links to disambiguation pages using AWB

2014-10-28T22:45:54Z

Induced taxes: Fixing links to disambiguation pages using AWB

← Older revision		Revision as of 00:45, 29 October 2014
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	~~{{Refimprove\|date=December 2009}}~~		Greetings. Let me begin by telling you the author's name - Phebe. To gather cash is what his family and him enjoy. For many years I've been working as a payroll clerk. South Dakota is exactly where I've always been living.<br><br>Also visit my website [http://u.9col.com/healthyfooddelivery98296 http://u.9col.com]

	~~[[Image:Resolved sideband cooling~~.~~jpg\|400px\|right\|Resolved sideband cooling]]~~
	~~'''Resolved sideband cooling''~~' is a [[laser cooling]] technique that can be used to cool strongly trapped atoms to the quantum [[ground state]] of their motion. The atoms are usually precooled using the [[Doppler cooling\|Doppler]] [[laser cooling]]. Subsequently the resolved [[sideband]] cooling is used to cool the atoms beyond the [[Doppler cooling limit]].

	A cold trapped atom can be treated to a good approximation as a [[quantum mechanical]] [[harmonic oscillator]]. If the spontaneous decay rate is much smaller than the vibrational frequency of the atom in the trap, the [[energy level]]s ~~of the system can be resolved as consisting of internal levels each corresponding to a ladder of vibrational states.~~

	~~Suppose a two~~-~~level atom whose ground state is shown by ''g'' and excited state by ''e''~~. ~~Efficient laser cooling occurs when the frequency of the laser beam~~ is ~~tuned to the red sideband i.e.~~

	~~<math>\omega = \omega_{0} - \nu</math>,~~

	~~where <math>\omega_{0}</math> is the internal atomic transition frequency~~ and ~~<math>\nu</math> is the harmonic oscillation frequency of the atom~~. ~~In this case the atom undergoes the transition~~

	~~<math>\vert g, n \rangle \rightarrow \vert e, n-1 \rangle</math>,~~

	~~where <math>\vert a, m \rangle</math> represents the state of an ion whose internal atomic state is '~~'a~~'' and the motional state is ''m''~~. ~~This process~~ is ~~labeled '1~~' ~~in the image to the right.~~

	~~Subsequent [[spontaneous emission]] occurs predominantly at the carrier frequency if the recoil energy of the atom is negligible compared with the vibrational quantum energy i.e~~.

	<~~math~~>~~\vert e, n-1 \rangle \rightarrow \vert g, n-1 \rangle.~~<~~/math~~>

	~~This process is labeled '2' in the image to the right.~~
	The average effect of this mechanism is cooling the ion by one vibrational energy level. When these steps are repeated a sufficient number of times <math>\vert g,0 \rangle</math> is reached with a high probability.<ref>A.SCHLIESSER,R. RIVIÈRE, G. ANETSBERGER, O. ARCIZET,T. J. KIPPENBERG [http://~~www~~.~~nature~~.com/~~nphys~~/~~journal~~/~~v4/n5/full/nphys939~~.~~html "Resolved-sideband cooling of a micromechanical oscillator"], nature physics, Vol 4 MAY 2008~~.~~</ref>~~

	~~==References==~~
	~~{{Reflist}}~~

	~~==See also==~~
	* [[Laser cooling]]
	* [[Amplitude modulation]]

	~~{{DEFAULTSORT:Resolved Sideband Cooling}}~~
	~~[[Category:Atomic physics]]~~
	~~[[Category:Plasma physics]]~~
	~~[[Category:Cooling technology]~~]

en>TAnthony: Update deprecated cite parameter (coauthors) using AWB

2014-01-17T07:52:32Z

Update deprecated cite parameter (coauthors) using AWB

← Older revision		Revision as of 09:52, 17 January 2014
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	The ~~author~~ is ~~called std testing at home Irwin Wunder but it~~'~~s not~~ the ~~most [http://www~~.~~nytimes~~.~~com~~/~~ref~~/~~health~~/~~healthguide~~/~~esn-herpes-ess.html masucline] name out there. The favorite pastime for my children~~ and me is ~~to play~~ ~~home std test baseball but I haven~~'~~t produced a dime~~ with it. ~~For years I~~'~~ve been operating as a payroll clerk~~. ~~Puerto Rico~~ is ~~where he's been living for years and he will~~ by ~~no means move~~.<br><br>~~Here~~ is ~~my blog :: home std test kit (~~[http://~~pagepapers~~.com/~~index~~.~~php?do=/profile~~-~~4850~~/~~info/ just click the following web page~~])		{{Refimprove\|date=December 2009}}

			[[Image:Resolved sideband cooling.jpg\|400px\|right\|Resolved sideband cooling]]
			'''Resolved sideband cooling''' is a [[laser cooling]] technique that can be used to cool strongly trapped atoms to the quantum [[ground state]] of their motion. The atoms are usually precooled using the [[Doppler cooling\|Doppler]] [[laser cooling]]. Subsequently the resolved [[sideband]] cooling is used to cool the atoms beyond the [[Doppler cooling limit]].

			A cold trapped atom can be treated to a good approximation as a [[quantum mechanical]] [[harmonic oscillator]]. If the spontaneous decay rate is much smaller than the vibrational frequency of the atom in the trap, the [[energy level]]s of the system can be resolved as consisting of internal levels each corresponding to a ladder of vibrational states.

			Suppose a two-level atom whose ground state is shown by ''g'' and excited state by ''e''. Efficient laser cooling occurs when the frequency of the laser beam is tuned to the red sideband i.e.

			<math>\omega = \omega_{0} - \nu</math>,

			where <math>\omega_{0}</math> is the internal atomic transition frequency and <math>\nu</math> is the harmonic oscillation frequency of the atom. In this case the atom undergoes the transition

			<math>\vert g, n \rangle \rightarrow \vert e, n-1 \rangle</math>,

			where <math>\vert a, m \rangle</math> represents the state of an ion whose internal atomic state is ''a'' and the motional state is ''m''. This process is labeled '1' in the image to the right.

			Subsequent [[spontaneous emission]] occurs predominantly at the carrier frequency if the recoil energy of the atom is negligible compared with the vibrational quantum energy i.e.

			<math>\vert e, n-1 \rangle \rightarrow \vert g, n-1 \rangle.</math>

			This process is labeled '2' in the image to the right.
			The average effect of this mechanism is cooling the ion by one vibrational energy level. When these steps are repeated a sufficient number of times <math>\vert g,0 \rangle</math> is reached with a high probability.<ref>A.SCHLIESSER,R. RIVIÈRE, G. ANETSBERGER, O. ARCIZET,T. J. KIPPENBERG [http://www.nature.com/nphys/journal/v4/n5/full/nphys939.html "Resolved-sideband cooling of a micromechanical oscillator"], nature physics, Vol 4 MAY 2008.</ref>

			==References==
			{{Reflist}}

			==See also==
			* [[Laser cooling]]
			* [[Amplitude modulation]]

			{{DEFAULTSORT:Resolved Sideband Cooling}}
			[[Category:Atomic physics]]
			[[Category:Plasma physics]]
			[[Category:Cooling technology]]

196.46.120.120 at 00:57, 2 June 2012

2012-06-02T00:57:35Z

New page

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