## What is Einstein’s quantum theory?

Albert Einstein famously said that **quantum mechanics should allow two objects to affect each other’s behaviour instantly across vast distances**, something he dubbed “spooky action at a distance”^{1}. Decades after his death, experiments confirmed this.

## What are the possible quantum states?

The quantum states are primarily **x-y-z position, momentum, angular momentum, energy, spin and time**.

## Is the observer effect real?

This effect **can be found in many domains of physics, but can usually be reduced to insignificance by using different instruments or observation techniques**. An especially unusual version of the observer effect occurs in quantum mechanics, as best demonstrated by the double-slit experiment.

## Are Wavefunctions real?

**The wavefunction is a real physical object** after all, say researchers. At the heart of the weirdness for which the field of quantum mechanics is famous is the wavefunction, a powerful but mysterious entity that is used to determine the probabilities that quantum particles will have certain properties.

## What did Einstein call photons?

In March 1905 , Einstein created the quantum theory of light, the idea that **light exists as tiny packets, or particles**, which he called photons.

## Is time Travelling possible?

General relativity. **Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light**, such as cosmic strings, traversable wormholes, and Alcubierre drives.

## What is a pure state quantum?

**Quantum states that cannot be written as a mixture of other states** are called pure quantum states, while all other states are called mixed quantum states.

## What are the 4 quantum numbers?

In atoms, there are a total of four quantum numbers: the principal quantum number (n), the orbital angular momentum quantum number (l), the magnetic quantum number (m_{l}), and the electron spin quantum number (m_{s}).

## What are the 4 quantum numbers explain each?

Key Points. To completely describe an electron in an atom, four quantum numbers are needed: **energy (n), angular momentum (ℓ), magnetic moment (m _{ℓ}), and spin (m_{s})**. The first quantum number describes the electron shell, or energy level, of an atom.

## Is time a wave?

Time comes from every particle within our bodies, including our DNA that is made of these same atoms and particles. **Time is the frequency of longitudinal energy waves**. However, time is not constant. It changes with motion.

## Is reality a wave?

Take the de Broglie-Bohm theory, which says that **reality is both wave and particle**. A photon heads towards the double slit with a definite position at all times and goes through one slit or the other; so each photon has a trajectory.

## Are Eigenstates real?

**The eigenstates form a basis**. And any wavefunction is some complex linear combination of eigenstates. If you find a basis with complex functions you can simply rejig the basis functions so that your basis has real valued functions. You could also rejig things so the basis functions are purely imaginary valued.

## Are all Wavefunctions eigenfunctions?

**Generally, a wavefunction is a collection or linear combination of eigenfunctions**. Wavefunction can be regarded as a fuzzy thing which carries many eigenfunctions and upon measurement what we get is just one of those eigenfunctions as the state of the system.

## Is eigenstate an eigenvector?

is that eigenvector is (linear algebra) a vector that is not rotated under a given linear transformation; a left or right eigenvector depending on context while **eigenstate is (physics) a dynamic quantum mechanical state whose wave function is an eigenvector that corresponds to a physical quantity**.

## How do you tell if a wave function is an eigenstate?

These special wavefunctions are called eigenstates, and the multiples are called eigenvalues. Thus, if Aψa(x)=aψa(x), where a is a complex number, then ψa is called an eigenstate of A corresponding to the eigenvalue a.

## What is an eigenvalue in quantum?

The term eigenvalue is used to designate **the value of measurable quantity associated with the wavefunction**. If you want to measure the energy of a particle, you have to operate on the wavefunction with the Hamiltonian operator (Equation 3.3. 6).

## What exactly is an eigenstate?

Definition of eigenstate

: a state of a quantized dynamic system (such as an atom, molecule, or crystal) in which one of the variables defining the state (such as energy or angular momentum) has a determinate fixed value.