Quantum Calculators
Last updated: September 2026
Blackbody Radiation Calculator
Calculates total radiated power, peak emission wavelength, spectral intensity, or energy density for a blackbody or grey body at a given temperature.
Infinite Square Well Energy Calculator
Calculates the quantised energy levels of a particle confined in an infinite square potential well, given the quantum number, well width, and particle mass.
Quantum Wave Packet Dispersion Calculator
Calculates how a quantum wave packet's spatial width grows over time due to quantum dispersion.
Quantum Confinement Energy Calculator
Computes discrete energy levels of a particle confined in a 1D quantum well, 2D quantum wire, or 3D quantum dot.
Photon Energy and Frequency Calculator
Converts a photon's wavelength to its energy in joules or electron-volts, accounting for the refractive index of the medium.
Quantum Spin and Angular Momentum Calculator
Calculates the magnitude, z-component, magnetic moment, and multiplicity of quantum spin or orbital angular momentum.
Quantum Entanglement Fidelity Calculator
Compute concurrence, entanglement entropy, or Bell-inequality violation for a two-qubit pure state defined by amplitudes α and β.
Photon Energy Calculator
Compute the energy of a single photon from its wavelength using E = hc/λ, the Planck-Einstein relation.
Particle in a Box Calculator
Computes the quantised energy levels of a particle confined in a 1D, 2D, or 3D infinite potential well.
Quantum Angular Momentum Calculator
Computes the magnitude of orbital, spin, or total angular momentum for atomic electrons using quantum numbers.
Quantum Spin-Orbit Coupling Calculator
Computes the spin-orbit coupling energy for an atomic electron given orbital, spin, and total angular momentum quantum numbers plus a coupling constant.
Quantum Harmonic Oscillator Energy Calculator
Calculates the quantised energy levels of a quantum harmonic oscillator for a given frequency and quantum number.
Spin Angular Momentum Calculator
Calculates the magnitude of a particle's spin angular momentum from its spin quantum number s.
Infinite Square Well Calculator
Calculates the quantized energy levels, de Broglie wavelengths, and momenta of a particle confined in a one-dimensional infinite square well.
Quantum Gate Fidelity Calculator
Estimate the fidelity of single-qubit, CNOT, or multi-qubit gates by combining decoherence decay and control-field errors.
Quantum Teleportation Protocol Calculator
Estimate the end-to-end fidelity of a quantum teleportation protocol over a lossy channel given entanglement quality, detector efficiency, and distance.
De Broglie Wavelength Calculator
Compute the de Broglie wavelength λ = h/(m·v) of a massive particle from its mass and velocity.
Schrödinger Wave Function Calculator
Compute the wave function ψ(x) for a particle in an infinite square well or as a free particle.
Quantum Algorithm Complexity Calculator
Estimate circuit depth and quantum speedup for Shor's, Grover's, and QFT algorithms.
Heisenberg Uncertainty Principle Calculator
Compute the minimum momentum uncertainty Δp ≥ h/(4π·Δx) implied by Heisenberg's uncertainty principle for a given position uncertainty.
Quantum Decoherence Time Calculator
Estimates how quickly a quantum superposition loses coherence due to environmental interactions.
Quantum Error Correction Threshold Calculator
Estimate the logical error rate of surface, Steane, or generic quantum error-correcting codes given physical error rate, code distance, and decoder choice.
Hydrogen Atom Energy Levels Calculator
Calculates hydrogen-like atom energy levels, orbital radii, and spectral wavelengths from the Schrödinger equation.
Debye Temperature Calculator
Calculates the Debye temperature of a crystalline solid from its atomic density and sound velocity.
Fermi Energy and Temperature Calculator
Computes the Fermi energy and Fermi temperature of a free or effective-mass electron gas from carrier density, dimensionality, and effective mass.
Compton Scattering Calculator
Compute the scattered photon's wavelength after Compton scattering off a free electron, given the initial wavelength and scattering angle.
Quantum Entanglement Measure Calculator
Quantifies the degree of entanglement in a two-qubit pure quantum state using concurrence, von Neumann entropy, or negativity.
Quantum Tunneling Probability Calculator
Compute the WKB transmission probability T ≈ exp(−2·w·κ) for a particle tunnelling through a rectangular potential barrier, given barrier height, width, and particle energy.