QUANTUM PHYSICS AND QUANTUM INFORMATION

Quantum Entanglement Inspector.

Additional page sections

Computes normalization and a concurrence-style indicator for two-qubit pure states.

Version 2.4 Prototype Protected engine Two-qubit entanglement note
PURPOSE

Decision supported.

Computes normalization and a concurrence-style indicator for two-qubit pure states.

Intended user

research, assurance and technical review teams

Output status

Preliminary outputHuman review requiredNot certification
USE CASES

Where this instrument fits.

  • Check Bell-state examples
  • Estimate separability of two-qubit pure states
  • Create entanglement calculation notes
  • Document measurement-correlation assumptions
INPUTS

Required input fields.

  • |00> real (required)
  • |00> imag (required)
  • |01> real (required)
  • |01> imag (required)
  • |10> real (required)
  • |10> imag (required)
  • |11> real (required)
  • |11> imag (required)

Data handling: this interface uses the L2ET protected same-origin instrument engine. Do not enter confidential, regulated, privileged, incident, medical or sensitive operational data.

METHOD

Formula Workbench logic.

Normalizes a two-qubit state and computes C=2|ad-bc| as a pure-state entanglement indicator.

Source families

quantum informationtwo-qubit pure-state entanglement

Assumptions

  • Pure-state two-qubit model only.
  • Concurrence calculation is simplified for educational/research orientation.
  • Mixed states need a more complete density-matrix treatment.
INTERACTIVE INSTRUMENT

Two-qubit entanglement note.

Use the controls below to generate a preliminary artifact. The output is intentionally bounded and requires human review.

OUTPUT ARTIFACT

Two-qubit entanglement note.

The generated artifact includes findings, assumptions, limitations, recommended next actions and exportable structured output.

Export options

Copy outputMarkdownJSON
EXAMPLE

Example input and output.

Example input

Bell state (|00>+|11>)/sqrt(2).

Example output

Outputs normalized state and concurrence near 1 with Bell-like correlation note.

LIMITATIONS

What this tool does not do.

  • Does not certify experimental entanglement.
  • Does not process tomography data.
  • Does not handle many-qubit entanglement.

This instrument does not provide legal, medical, cryptographic, engineering, regulatory or compliance certification.

RELATED METHOD

Method and workflow links.

Read the family method note for assumptions, output artifacts, update policy and review boundaries.

Open methodology Open family

RELATED TOOLS

Suggested workflow sequence.

Qubit State Inspector

Normalizes a single-qubit state and computes measurement probabilities, Bloch coordinates and density matrix notes.

open instrument →

Quantum Circuit Resource Estimator

Estimates logical and physical resource pressure from qubits, depth, T-count and error-rate assumptions.

open instrument →

QFT Scale Lens

Converts energy, length and time scales in natural-unit style and checks order-of-magnitude consistency.

open instrument →
CHANGELOG

Version history.

  • v2.4 - Research-grade instrument template, method notes, assumptions, limitations, example and export actions added.
  • Last updated: 2026-05-27.
  • Maturity state: Prototype.