ac238 skyrmions-trial issues

ac238 / skyrmions-trial

A trial project in which I simulate the dynamics of skyrmions using MATLAB.

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Matt 7/15: 3. Spin wave spectrum with cosine dispersion!

#53 ac238 opened 2 months ago
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Matt 7/15: 2. Read Shankar 1991

#52 ac238 opened 2 months ago
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Matt 7/15: 1. Change PFNLsM action from discrete to continuous!

#51 ac238 opened 2 months ago
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Deepak 7/17: 4. Bucknell VPN

#50 ac238 opened 2 months ago
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Deepak 7/17: Save the annealed skyrmion texture to initialize every time!

#49 ac238 opened 2 months ago
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Deepak 7/17: 2. Find out why Zeeman ABL still leeches energy from the skyrmion

#48 ac238 opened 2 months ago
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Deepak 7/17: 1. Match Coulomb strengths

#47 ac238 opened 2 months ago
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Matt 7/10 2.: Eqs (2.1) -> Eq. (2.7) in PFNLsM 25, v1.6

#46 ac238 closed 2 months ago
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Matt 7/10 1.: compute quadratic spin-wave spectrum (zero damping, ignore Coulomb)

#45 ac238 closed 2 months ago
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Deepak 7/10 1.: Velocity and angle vs driving frequency

#44 ac238 opened 3 months ago
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7/10 Deepak 0.: standardize parameters between Deepak and Alexander

#43 ac238 closed 3 months ago
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Matt 7/03 4.: Analytics: Evaluate the effective fluctuation action

#42 ac238 opened 3 months ago
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Matt 7/03 3.: Track center of mass to get notional drift, Track radius of core and correlate to damping

#41 ac238 opened 3 months ago
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Matt 7/03 2.: Derive an explicit equation for energy dissipation

#40 ac238 opened 3 months ago
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Matt 7/03 1.: try annealing a skyrmion of some size with Coulomb + Zeeman + damping EVERYWHERE.

#39 ac238 opened 3 months ago
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Foster 6/14: review Girvin, Coulomb and electric charge

#38 ac238 opened 3 months ago
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Foster 6/14: reach PFNLsM 25 Eq. 1.14, double check his scratch work, get Laplacian and no mass

#37 ac238 opened 3 months ago
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Foster 6/12: Tr log on 2+1D spacetime + spin?

#36 ac238 opened 3 months ago
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Foster 6/5: learn about Rashva coupling, review trace-log for Bose-Hubbard

#35 ac238 opened 3 months ago
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Deepak 5-21: Read Iwasaki and Schutte on Zotero

#34 ac238 opened 3 months ago
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RK4 Damping

#33 xandergc closed 3 months ago
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Include E field in effective field

#32 ac238 closed 3 months ago
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Effective field Hamiltonian energy?

#31 ac238 closed 3 months ago
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Energies in terms of effective field

#30 ac238 opened 4 months ago
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Write all energies/terms in terms of b,e,alpha, not zeeman, coulomb, etc., fix signs so b,e,alpha>0

#29 ac238 closed 4 months ago
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Remove all periodic boundary conditions

#28 ac238 closed 4 months ago
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Check Coulomb energy conservation

#27 ac238 closed 4 months ago
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Make El term conserve Q_top!

#26 ac238 closed 6 months ago
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Try oscillating electric field

#25 ac238 closed 7 months ago
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Find one-line RK4 function?

#24 ac238 closed 7 months ago
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Coulomb term is O(N^2), should be linear

#23 ac238 closed 6 months ago
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2/28 3. Use multidim array for spin field

#22 ac238 closed 7 months ago
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2/28 1. Renormalize spins at every step

#21 ac238 closed 7 months ago
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Find skyrmion center of mass and radius

#20 ac238 closed 7 months ago
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Ensure that energy is conserved! Add Coulomb energy term

#19 ac238 closed 4 months ago
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3. Vectorize Coulomb term, 4. Graph Coulomb energy

#18 ac238 closed 7 months ago
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2/28 2. Fix E field to preserve shape, drift in y direction

#17 ac238 closed 7 months ago
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RK4 for electric field

#16 ac238 closed 7 months ago
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Periodic boundaries everywhere?

#15 ac238 closed 7 months ago
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Make LL term conserve abs(m)=1

#14 ac238 closed 7 months ago
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Fix sign of Q

#13 ac238 closed 4 months ago
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6. Graph Pontryagin density

#12 ac238 closed 7 months ago
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5. Plot a single slice and observe!

#11 ac238 closed 7 months ago
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4. Check for conserved quantities: Sz, Energy, Topological charge

#10 ac238 closed 7 months ago
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3. 4th order Runge Kutta for all EOM terms

#9 ac238 closed 7 months ago
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Vectorize everything!

#8 ac238 closed 7 months ago
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1. Make the density work, use solid-angle

#7 ac238 closed 7 months ago
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Try Runge-Kutta or Heun?

#6 ac238 closed 7 months ago
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Fix Landau-Lifshitz term

#5 ac238 closed 7 months ago
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Measure topological charge

#4 ac238 closed 7 months ago
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