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Schrödinger equation

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Summary

The Schrödinger-picture evolution equation itψ(t)=Hψ(t)i\hbar\,\partial_t|\psi(t)\rangle=H|\psi(t)\rangle; its concrete Hamiltonian may describe a nonrelativistic system or an effective quantum theory.

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Incoming relations (arrows to this concept)

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Laplace operatorSchrödinger equation

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

The nonrelativistic kinetic term is proportional to the Laplacian in position representation.

How to interpret this relation type

A mathematical concept supplies part of the formal language, state space, representation, or analytic machinery used by a scientific or mathematical-physics concept. The source is the mathematical predecessor; this does not claim that physical content follows from mathematics alone.

Relation sources

Partial differential equationSchrödinger equation

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

The Schrödinger equation is a linear partial differential equation in common coordinate representations, with coefficients and domain fixed by the Hamiltonian and physical boundary conditions.

How to interpret this relation type

A more specific theory, model, entity class, or regime is obtained by restricting or extending the scope of a broader framework.

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Pauli equationSchrödinger equation

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

For spin-independent interactions or after suppressing spin terms, the Pauli equation reduces to Schrödinger dynamics.

How to interpret this relation type

The target is recovered from the source either in a stated mathematical or asymptotic limit, or through a quantitatively controlled approximation with identified small parameters or omitted terms. The edge label and detail must state which case applies and its regime of validity.

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Outgoing relations (arrows from this concept)

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Schrödinger equationPeriodic-electron model

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

A periodic-electron model uses the nonrelativistic Schrödinger eigenvalue problem with a lattice-periodic one-particle or mean-field Hamiltonian. Correlation, relativistic, disorder, and lattice-motion effects require extensions or different effective descriptions.

How to interpret this relation type

The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.

Relation sources

Schrödinger equationQuantum mechanics

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

The Schrödinger equation supplies the state-evolution law for the Schrödinger-picture formulation of nonrelativistic quantum mechanics; it is not the universal evolution equation of all quantum theories.

How to interpret this relation type

The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.

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Schrödinger equationQuantum tunneling

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

Solving the Schrödinger equation across a barrier gives reflected and transmitted amplitudes, with semiclassical formulas valid only when their stated action and smoothness conditions hold.

How to interpret this relation type

A theory, law, or interaction describes the behavior of the target within a stated regime. The edge detail must state important limits or qualifications.

Relation sources

Schrödinger equationUnitary time evolution

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This is an authored directed relation from the source endpoint to the target endpoint.

Authored explanation

For a self-adjoint time-independent Hamiltonian, the Schrödinger equation is the differential form of the strongly continuous unitary evolution U(t)=eitH/U(t)=e^{-itH/\hbar}. Time-dependent Hamiltonians require additional domain and well-posedness hypotheses.

How to interpret this relation type

Reinterpret an object, pass to an equivalent presentation, or relate canonically corresponding structures; the carrier may change.

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