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'''Rabi resonance method''' is a technique developed by [[Isidor Isaac Rabi]] for measuring the nuclear spin. The atom is placed in a static magnetic field and a perpendicular rotating magnetic field.  
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We present a classical treatment in here.
 
==Theory==
 
when only the static magnetic field (B<sub>0</sub>) is turned on. the spin will be [[precess]] around it with [[Larmor frequency]] ν<sub>0</sub> and the corresponding angular frequency is ω<sub>0</sub>.  
 
According to mechanics, the equation of motion of the spin J is:
 
:: <math> \frac {d \vec {J}}{d t} = \vec{\mu} \times \vec {B} </math>
 
:: <math> \vec{\mu} = g \frac {\mu_B} {\hbar} \vec {J}  = \gamma \vec {J} </math>
 
where μ is the [[magnetic moment]].
 
g is [[g-factor]], which is dimensionless and reflecting the environmental effect on the spin.
 
Solving gives the angular frequency ([[Larmor frequency]]) with the magnetic field pointing on z-axis:
 
:: <math> \omega_0  =  -  \frac {\gamma}{\hbar} B_0 </math>
 
The minus sign is necessary. it reflects that the J is rotating in left-hand when the thumb is pointing as the H field.
 
when turned on the rotating magnetic field (B<sub>R</sub>), with angular frequency ω. In the rotating frame of the rotating field, the equation of motion is:
 
:: <math> \frac {d \vec {J_R }}{d t} = \frac {d \vec {J}}{d t} - \vec {J} \times  \omega </math>
 
or
 
:: <math> \frac {d \vec {J_R}}{d t} =  \frac {\gamma}{\hbar} \vec {J} \times (\vec {B_0} + \vec{B_R}) -  \vec {J} \times  \omega </math>
 
if <math> \frac {\gamma}{\hbar} B_0 = \omega </math>, the static field was cancelled, and only the "sleeping" rotation frame. and the spin is now precess around H<sub>R</sub> with angular frequency [[Rabi frequency]]
 
:: <math> \omega_R = \frac {\gamma}{\hbar} H_R </math>
 
Since the rotating field is perpendicular to the static field. the spin in rotating fame is now able to flip between up and down.  
 
by sweeping ω<sub>R</sub>, one can obtain a maximum flipping and determine the magnetic moment.
 
==Experiment==
 
the experiment setup contains 3 parts, an inhomogeneous magnetic field in front, the rotating field at the middle, and another inhomogeneous magnetic field at the end.
 
atoms after passed the first inhomogeneous field will split into 2 beams corresponding the spin up and spin down state. selecting 1 beams (spin up state, for example) and let it pass the rotating field. If the rotating field has frequency (ω) equal to the Larmor frequency, it will produced a high intensity of the other beam (spin down state). by sweeping the frequency to obtain a maximum intensity, one can find out the Larmor frequency and the magnetic moment of the atom.
 
==References and notes==
http://www.colorado.edu/physics/phys7550/phys7550_sp07/extras/Ramsey90_RMP.pdf
 
==See also==
*[[Rabi frequency]]
*[[Rabi cycle]]
*[[Rabi problem]]
 
[[Category:Quantum optics]]
[[Category:Atomic physics]]
[[Category:Atomic, molecular, and optical physics]]

Revision as of 17:39, 16 February 2014

Inhale in carefully right away through your nose and also keep it so long as you're able, could come to be for 10-seconds. These are the requirements of anxious child. When she first started on her business, she found it very difficult meeting clients and backers to pitch her idea. Provanax For Anxiety And Panic Attack Treatment ProVanax are a natural anxiety and panic attack treatment, ProVanax also helps with your mood and depression. The women complain about being in a constant state of anxiety attacks during pregnancy. panic attack counseling, is one of the best therapy alternatives readily available if you suffer these forms of assaults. The objective of the variety of medication what is an anxiety attack like to decrease the sensitiveness regarding the patient to tension and fear. Under medical supervision, you will be made to re-live the symptoms of panic, e.

One of the main ways that panic attack counseling can help is that it can help you identify once a panic attack is about to occur and the way you should deal with it. Psychoactive Drugs: Pharmaceutical drugs that are prescribed for anxiety disorders also treat panic attacks. This enables folks to realize that the scenario is perhaps not actually threatening, and additionally they can slowly place issues into attitude. On the other hand, there are other women who will complain about being depressed all the time. Medicines do have their merits. Sufferers note feeling intense dread, feeling as though they are losing control or dying. We call this procedure organized desensitization.

You can also do following things as panic attack therapy. Breathing Techniques - One of the most common physical symptom of an anxiety/panic attack is difficult, rapid breathing, called hyperventilation. In some cases, if the maternity is not planned for, it can make the woman anxious as well. Treatment: Proper therapy when started at an early phase do assist in minimizing or eliminating the problems. Although many people posses more or less doubt but they try to approach for a hypnotic treatment so far. Most of these pills are known as suppressors which inhibits a part of the brain. Medication is often the main form of treatment for a majority of panic attack suffers. Attending pre-childbirth sessions.

ProVanax works on many angles at the same time offering more controlled and natural responses in the body. Both these anxiety and anxiety remedies will assist to restrict the causes and symptoms of panic disorder. The effects last ... As an evolutionary response to stress, anxiety helps us to cope better with unforeseen and unpleasant situations by helping us to focus better on the current situation at hand. These can include unemployment, the death of a loved one, divorce, or having a baby. Symptoms: http://wiki.quattroworld.com/index.php/Anxiety_And_Depression_Here_Is_My_Story Heart pounding Excessive perspiration Panting or shortness of breath Rapid pulse Feeling as if death is near at that moment Shaking body Nausea/vomiting Dizziness, accompanied by headache Pain and tightness within the upper body Cramps within the stomach Near fainting Chills trouble in eating items or liquids Terrorized feeling Tingling in various parts of the body Hot flashes Factors: Panic attack is considered to become an idiopathic medical problems. The Prevention Panic Attack Treatment During Pregnancy, especially through medication necessitates constant vigilance so as to ensure a healthy foetus.

Psychoactive Drugs: Pharmaceutical drugs that become prescribed for anxiety disorders also treat panic attacks.