Quench Definition and 10 Threads

Hi, usually, when we talk about quantum quench dynamics we assume situation when Hamiltonian of a system has a sudden change from ##H_0## to ##H_1##. System was initially in the ground state (or more generally - eigenstate) of ##H_0##. The interesting dynamics appears when the commutator...

Homework Statement n/a Homework Equations n/a The Attempt at a Solution n/a Just a question. I keep seeing that in SN2 reactions, sometimes a molecule is quenched by H2O or H3O. I've seen it turn an O- into an OH and also a heteroatom into an H. What exactly is going on here?

Hi, I am designing a system to cool aluminium through contact cooling. I have a steel die with 9x 20mm diameter cooling chambers. Water is pumped through the chambers which cools the steel die and hopefully the aluminium sitting on top of it. I am looking to find the temperature of the...

The problem looks very simple. We have a time-dependent Hamiltonian: $$H(t) = B(t)H_0$$, where ##B(t)## is a numerical function, and matrix ##H_0## is time-indpendent. Let us consider: $$B(t) = \begin{cases} 1,&\text{for $0\leq t\leq t_0$}\\ A,&\text{for $t>t_0$.} \end{cases}$$ Also, let us...

The multiple coils superconducting maget is uaually quench protected by bypass diodes. The heat spreading model is mentioned on textbook for coil to coil quench spreading. But the heat spreading is not fast enough for magnet quench protection. Because the theoretical quench protection...

Could anybody tell me what is so called Quench Parameter ? And where is that parameter applys into? Thanks a lot! :smile:

Hi,I study protection of superconducting coils.I adopt heaters to protect coils.The circuit is in attachment. There are 6 coils,so I use 6 quench heaters.I want to know how I choose the heaters? It must do the Quench Heater Simulation for protection of superconducting coils before...

Hi, Can someone please explain what Quench Management is particularly when applied to magnetism. Thanks Regards neorich

Greetings! First time poster here. I'd appreciate whatever help anyone can provide. I have some pieces of F22 that were quenched and tempered. My customer needs to know how deep the quench properties extend, as he intends to machine off some of the O.D. Critical Diameter analysis is not...

Does anyone know how to get more ethene out of a propane/ethane stream? I know you can use a higher temperature, but can you do something with the steam ratio or pressure too? Also: After the reaction, we use a quench with water injection. Why should we do a compression step first before...