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  2. Quantum number - Wikipedia

    en.wikipedia.org/wiki/Quantum_number

    In the era of the old quantum theory, starting from Max Planck's proposal of quanta in his model of blackbody radiation (1900) and Albert Einstein's adaptation of the concept to explain the photoelectric effect (1905), and until Erwin Schrödinger published his eigenfunction equation in 1926, [1] the concept behind quantum numbers developed based on atomic spectroscopy and theories from ...

  3. Principal quantum number - Wikipedia

    en.wikipedia.org/wiki/Principal_quantum_number

    In a simplistic one-electron model described below, the total energy of an electron is a negative inverse quadratic function of the principal quantum number n, leading to degenerate energy levels for each n > 1. [1] In more complex systems—those having forces other than the nucleus–electron Coulomb force—these levels split.

  4. Azimuthal quantum number - Wikipedia

    en.wikipedia.org/wiki/Azimuthal_quantum_number

    For a given value of the principal quantum number n, the possible values of ℓ range from 0 to n − 1; therefore, the n = 1 shell only possesses an s subshell and can only take 2 electrons, the n = 2 shell possesses an s and a p subshell and can take 8 electrons overall, the n = 3 shell possesses s, p, and d subshells and has a maximum of 18 ...

  5. Good quantum number - Wikipedia

    en.wikipedia.org/wiki/Good_quantum_number

    [1] Good quantum numbers are often used to label initial and final states in experiments. For example, in particle colliders: [citation needed] Particles are initially prepared in approximate momentum eigenstates; the particle momentum being a good quantum number for non-interacting particles. The particles are made to collide.

  6. Probability amplitude - Wikipedia

    en.wikipedia.org/wiki/Probability_amplitude

    This leads to a constraint that α 2 + β 2 = 1; more generally the sum of the squared moduli of the probability amplitudes of all the possible states is equal to one. If to understand "all the possible states" as an orthonormal basis, that makes sense in the discrete case, then this condition is the same as the norm-1 condition explained above.

  7. Quantum algorithm - Wikipedia

    en.wikipedia.org/wiki/Quantum_algorithm

    The triangle-finding problem is the problem of determining whether a given graph contains a triangle (a clique of size 3). The best-known lower bound for quantum algorithms is (), but the best algorithm known requires O(N 1.297) queries, [31] an improvement over the previous best O(N 1.3) queries. [21] [32]

  8. Quantum error correction - Wikipedia

    en.wikipedia.org/wiki/Quantum_error_correction

    If the three bit flip group (1,2,3), (4,5,6), and (7,8,9) are considered as three inputs, then the Shor code circuit can be reduced as a sign flip code. This means ...

  9. Quantum calculus - Wikipedia

    en.wikipedia.org/wiki/Quantum_calculus

    For 0 < q < 1, the series converges to a function F(x) on an interval (0,A] if |f(x)x α | is bounded on the interval (0, A] for some 0 ≤ α < 1. The q-integral is a Riemann–Stieltjes integral with respect to a step function having infinitely many points of increase at the points q j..The jump at the point q j is q j.