What is Initial state: Definition and 20 Discussions

Initial D (Japanese: 頭文字D（イニシャル・ディー）, Hepburn: Inisharu Dī) is a Japanese street racing manga series written and illustrated by Shuichi Shigeno. It was serialized in Weekly Young Magazine from 1995 to 2013, with the chapters collected into 48 tankōbon volumes by Kodansha. The story focuses on the world of illegal Japanese street racing, where all the action is concentrated in the mountain passes and rarely in cities or urban areas, and with the drifting racing style emphasized in particular. Professional race car driver and pioneer of drifting Keiichi Tsuchiya helped with editorial supervision. The story is centered on the prefecture of Gunma, more specifically on several mountains in the Kantō region and in their surrounding cities and towns. Although some of the names of the locations the characters race in have been fictionalized, all of the locations in the series are based on actual locations in Japan.
Initial D has been adapted into several anime television and original video animations series by OB Studio Comet, Studio Gallop, Pastel, A.C.G.T and SynergySP. A live action film by Avex and Media Asia was released in 2005. Both the manga and anime series were initially licensed for English-language distribution in North America by Tokyopop (2002–2009), however, the anime license has since been picked up by Funimation, while the manga was relicensed by Kodansha USA in 2019.

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  1. M

    A Initial state of the Universe?

    [Moderator's note: Spin off from previous thread due to topic/level change.] Although the initial state of the universe is subject to much speculation, it seems to have started as all (or almost all) energy with particles being created out of photon-photon interactions.
  2. T

    Why Does Second Collision in Ballistic Pendulum Lead to Initial State?

    I was thinking about ballistic pendulums and the symmetry they exhibit. In the simplest case, you have one ball that begins at a certain height and collides with another ball at rest. You can calculate via conservation of momentum and energy the new velocities and max vertical displacements...
  3. pellman

    I How can one know the initial state from measurements?

    Theoretical problems often begin with "given a system in state ψ0" For example, the 2-slit experiment begins with the assumption of a plane wave incident on the slits. I had always understood to this mean some prior set of measurements had been made to determine the initial state. But how can...
  4. V

    I How do I find this state |j,m=j> to calculate another state?

    I’m confused about how you find the vector |s;s⟩ to use in the general equation |θ,ϕ⟩=exp(−iϕS3) * exp(−iθS2) |s;s⟩ For spin Coherent states (From http://www.scholarpedia.org/article/Coherent_state_(Quantum_mechanics)#4._Spin_Coherent_States Eq 12) Or how you find the vector |j,m=j⟩ to use...
  5. V

    I Confusion about initial states and coherent states

    I've found online that the coherent state of the harmonic oscillator is |\alpha \rangle = c \sum_{n=0}^\infty \frac{\alpha^n}{\sqrt{n!}} | n\rangle where |n\rangle = \frac{(a^\dagger)^n}{\sqrt{n!}} |0\rangle and |0> is called the initial state. I've some code where I need to have this...
  6. J

    Predicted Heat Death of the Universe

    Predicted Heat Death of the Universe In his thought provoking documentary “Wonder of the universe” ( ) Professor Brian Cox explains the thinking behind current predictions for the “Heat death of the universe”. He explains the predictions through the effect of the second law of thermodynamics...
  7. J

    Normal distribution starting with a uniformed distribution

    Hi comunity! I need to make a code o a normal distribution of velocities, starting whit a random secuence uniformly distributed between [0,1]. I am using FNT95, with Plato. I want to obtain a ''for'' bucle with I=1,N for the velocities. It is importan for the distribution to have sigma defined...
  8. J

    Fortran Problem with initial state in FORTRAN

    I have created an initial state code with perodic boundary conditions and normal distribution of velocities. I not know where is the problem, when I compile the computer detect the 112 error. Could anyone help me please? Thanks! the code is...
  9. D

    True map of universe from computer simulation with CMB initial state

    Do you think we will ever be able to create a simplified computer simulation of the universe using the cosmic microwave background as the initial state that would generate the true locations of galaxies or at least galaxy clusters, and then be able to find our own galaxy or galaxy cluster within...
  10. S

    MHB Looking at a solitary initial state

    I have this equation u0(x) = a0x2(1-x)2 for 0≤ x ≤ 1 = 0 for x>1 i have to investigate how will a solitary initial state such as the one above deform as time goes on. I know it will not deform if c is constant. when they say I must do this by a well-lnown method and produce video...
  11. G

    Definition of a Gaussian wave packet for a Initial State

    Hi :) I'm reading a didactic paper and the author defined the initial state ket as |\Phi_{in}> = {\int}dq\phi_{in}(q)|q> where q is a coordinate and \phi_{in}(q) = <q|\Phi_{in}> = exp\left[\frac{-q^{2}}{4\Delta^{2}}\right] I don't know if I'm missing something but isn't this definition a...
  12. T

    Rewriting an Initial State with Normalized Eigenfunctions

    Homework Statement Consider the Hamiltonian H=0.5p^2+ 0.5x^2, which at t=0 is described by: ψ(x,0)= 1/sqrt(8*pi) θ1(x) + 1/sqrt(18pi) θ2(x), where: θ1= exp(-x^2/2); θ2=(1-2x^2)*exp(-x^2/2) a) Normalize the eigenfunctions and rewrite the initial state in terms of normalized...
  13. A

    Find P_300 Given P_299: Initial State Vector Homework

    Homework Statement Suppose that the initial vector P0 is not given and instead we are given that at time t=299 the state vector is P_299=[.1 .1 .8]. Than find P_300, the state vector at time t=300 Homework Equations I also know from the problem it is referencing that the transition...
  14. B

    How can we know initial state of a particle

    In textbooks (such as Griffiths, for example), the general method for a solution to the Shrodinger's equation for a single particle, for some V(x), is given as : 1. Get the stationary state solutions 2. Combine them into a linear combination and figure out the coefficients from the known initial...
  15. K

    H20 Molecular shift - what is the initial state just below the Dew Point

    Hi all Another question (sorry) Water vapour in the air will phase shift back to liquid when it reaches its Dew Point temp (Partial Pressure = the Saturated Vapour Pressure), OK I have this. For this phase shift I assume that there are Condensation Nuclei and these nuclei are at a lower...
  16. R

    Initial state of the Universe (order or chaos)

    In the following video Penrose states that the Universe was so special and organized at its initial state the figure describing it would be "at least" 10^123. Begin at 4:50 Has this figure or any other figure been confirmed? Where can I go to find out if this is true or not. I found...
  17. P

    Initial state based on current state?

    I was wondering if it were in actuality possible to assume the universe was created from a big bang, as it seems we used current understanding of the laws of physics as they apply to us now, and extrapolated back. Could it be possible that the boundary conditions we form our laws of physics upon...
  18. D

    BM, initial state and information

    I have 3 questions regarding BM 1. Trans-plankian problem Let’s roll all processes back in time from the God’s view (so we see all BM particles and their trajectories are not hidden to us). Like any single-history deterministic theory in BM the future is ‘encoded’ in the past, so, the deeper...
  19. C

    Given the initial state, Ican find the time evolution wave function right?

    Homework Statement At t=0, the particle is in the eigenstate S_x , which corresponds to the eigenvalues -\hbar \over 2 The particle is in a magnetic field and its Hamiltonian is H=\frac{eB}{mc}S_z . Find the state at t>0. Homework Equations Eigenstate of the Sx is...
  20. Demystifier

    Decay and scattering: What happens between the final and the initial state?

    For processes of particle decay and inelastic scattering, quantum field theory (QFT) predicts well the probabilities of various final states for given initial states. Technically, this is described by the S-matrix, which is the unitary-evolution matrix describing the transitions from t=-infinity...
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