How Do Resonance and Quasiparticles Differ in Physics?

[touqra]

What is the difference between resonance and quasistable particles ?

 

[malawi_glenn]

Examples of quasiparticles are phonons, magnons, plasmons and electron holes in semiconducturs. You can google them up if you want to read more about them. They are things that behaves as a particle, but is not made up of elementary particles.

Resonances are (long lived in comparison)excited states of a comosite system, for instance the Delta+ particle (baryon) is an exicted state of the proton, have same quark compostition but larger rest mass. And you have this with mesons, for example the rho and omega meson.

I hope this helped you a bit, cheers!

 

[sir-pinski]

Resonance and quasiparticles are both concepts used in physics to describe the behavior of particles. While they may seem similar, there are distinct differences between the two.

Resonance refers to the phenomenon in which a system or particle oscillates at a specific frequency when it is subjected to an external force. This means that the energy of the system is absorbed and then released at a specific frequency, resulting in a characteristic peak in the system's response. One example of resonance is a swinging pendulum, which oscillates at a specific frequency determined by its length.

On the other hand, quasiparticles are not actual particles, but rather excitations or collective behavior of a group of particles. They can be thought of as "virtual particles" that emerge due to interactions between particles in a system. Quasiparticles have properties that are similar to those of real particles, such as mass and charge, but they are not fundamental particles.

The main difference between resonance and quasiparticles is that resonance refers to the behavior of a single particle or system, while quasiparticles describe the collective behavior of a group of particles. Additionally, resonance is a stable state of a particle or system, while quasiparticles are only temporary excitations that can decay back into the original particles.

In terms of stability, resonance and quasiparticles also differ. Resonance is a stable state that can persist as long as the external force is present, while quasiparticles are considered to be quasistable, meaning they have a finite lifetime and eventually decay back into the original particles.

In summary, resonance and quasiparticles are distinct concepts in physics. Resonance refers to the oscillation of a single particle or system, while quasiparticles describe the collective behavior of a group of particles. Additionally, resonance is a stable state, while quasiparticles are only temporary excitations.