Mathematics · Quantum Mathematics
Quantum State Infidelity Calculator
Calculate state infidelity from unit fidelity scale and state fidelity.
Inputs and results stay in this browser. Change one value at a time to explore the relationship.
Calculation steps
- Use c=a−b with unit fidelity scale=1 and state fidelity=0.96.
- state infidelity=0.040000000000000036.
Understand Quantum State Infidelity
One idea, three depths
Choose how deeply to explain Quantum State Infidelity
Quantum State Infidelity: Calculate state infidelity from unit fidelity scale and state fidelity.
Age 5Explain it to a 5-year-oldStart with a picture
Imagine using Quantum State Infidelity to answer this question: calculate state infidelity from unit fidelity scale and state fidelity? Enter unit fidelity scale and state fidelity; the calculator shows state infidelity. For example: unit fidelity scale=1 and state fidelity=0.96 produce state infidelity=0.040000000000000036. The answer tells you state infidelity.
Age 15Explain it to a 15-year-oldConnect it to the formula
Infidelity is one minus fidelity under the unit probability convention. This page evaluates the relationship directly. The rule is c=a−b. Its input values are unit fidelity scale, state fidelity, and the main result is state infidelity. For example: unit fidelity scale=1 and state fidelity=0.96 produce state infidelity=0.040000000000000036.
CollegeExplain it at college levelState the model precisely
This calculator evaluates the stated quantum state infidelity relation over the valid real-number domain stated below. The implemented relation is c=a−b, evaluated from unit fidelity scale, state fidelity to produce state infidelity. Infidelity is one minus fidelity under the unit probability convention. This page evaluates the relationship directly. Confirm whether the cited fidelity convention is squared or unsquared.
Inputs and valid domain
- unit fidelity scale must be a finite real number.
- state fidelity must be a finite real number.
Important boundary: Confirm whether the cited fidelity convention is squared or unsquared.
The formula
c=a−b
How the calculator works through it
It substitutes unit fidelity scale, state fidelity into the formula and exposes every numerical step above. The main output is state infidelity.
Read the result correctly
The state infidelity is the direct answer to “calculate state infidelity from unit fidelity scale and state fidelity.” Read it with the units shown beside the inputs; a sign, angle, percentage or rate changes what the number means.
A worked check
unit fidelity scale=1 and state fidelity=0.96 produce state infidelity=0.040000000000000036.
Where this model stops being reliable
Confirm whether the cited fidelity convention is squared or unsquared.
Learn it by changing one value
Begin with the worked example, then change one value while keeping the others fixed. Compare the new result and calculation steps to identify which part of the formula changed.
Dictionary terms behind this calculator
Before studying the codeWhat you should know firstUse the calculator immediately, or check the foundations before reading the implementation.
These foundations help you understand why Quantum State Infidelity works. They never block the calculator, and “optional” means useful context rather than a hidden requirement.
Hard requirements
- Reading formulas and substituting values
Quantum State Infidelity uses c=a−b. You need to recognise what each side represents before substituting the stated inputs or rearranging the relationship.
Review this foundation about 4 min
Strong support
- Probability and normalised outcomes
Probability interpretation is needed to connect the Quantum State Infidelity mathematics to measurable outcomes.
Review this foundation about 6 min
Optional enrichment
- Complex amplitudes
Complex-number notation gives deeper context for amplitudes and phase relationships related to Quantum State Infidelity.
Review this foundation about 7 min
Mathematics → algorithm → program
Implement this calculation in code
These are direct reference implementations of the calculator's principal relationship and first output. They run locally and include a small known-answer check where the language supports it.
Algorithm
- Read unit fidelity scale, state fidelity.
- Evaluate the principal relationship: c=a−b.
- Return state infidelity and check the domain conditions described above.
Python
from math import *
def quantum_state_infidelity_calculator(a, b) -> float:
return (a - b)
assert abs(quantum_state_infidelity_calculator(1, 0.96) - 0.040000000000000036) < 1e-6 * max(1.0, abs(0.040000000000000036))
C
#include <assert.h>
#include <math.h>
double quantum_state_infidelity_calculator(double a, double b) {
return (a - b);
}
int main(void) {
const double expected = 0.040000000000000036;
const double actual = quantum_state_infidelity_calculator(1, 0.96);
assert(fabs(actual - expected) < 1e-6 * fmax(1.0, fabs(expected)));
}
C++
#include <cassert>
#include <cmath>
#include <numbers>
double quantum_state_infidelity_calculator(double a, double b) {
return (a - b);
}
int main() {
constexpr double expected = 0.040000000000000036;
const double actual = quantum_state_infidelity_calculator(1, 0.96);
assert(std::fabs(actual - expected) < 1e-6 * std::fmax(1.0, std::fabs(expected)));
}
Linux x86-64 assembly
x86-64 NASM · System V ABI · Linux · SSE2 with libm where required
; double quantum_state_infidelity_calculator(double a, double b)
; Linux x86-64 NASM · System V ABI · first eight doubles in xmm0–xmm7
global quantum_state_infidelity_calculator
section .text
quantum_state_infidelity_calculator:
push rbp
mov rbp, rsp
sub rsp, 32
movsd [rbp-8], xmm0
movsd [rbp-16], xmm1
movsd xmm0, [rbp-8]
subsd xmm0, [rbp-16]
movsd [rbp-24], xmm0
movsd xmm0, [rbp-24]
leave
ret
MATLAB
function result = quantum_state_infidelity_calculator(a, b)
result = (a - b);
end
Wolfram Language
ClearAll[mwCalculate];
mwCalculate[a_, b_] := (a - b);
Continue in mathematical software
The downloaded file includes your current inputs and first calculated result. It is created locally.
Floating-point answers can differ slightly by language, compiler and processor. Compare within a suitable tolerance rather than assuming every decimal representation will be identical.
Supporting sourcesAcademic referencesPrimary standards, textbooks and complete citations
Standards, reading and academic references
Use the calculator as the worked interaction, then consult the primary standards and academic textbooks listed below. MW SysArc links to the original sources; the explanation on this page is original and does not reproduce them.
University Physics Volume 3
Read OpenStax University Physics: Quantum MechanicsCite this book
- APA 7
- Ling, S. J., Sanny, J., & Moebs, W. (2016). University physics volume 3. OpenStax. https://openstax.org/books/university-physics-volume-3/pages/1-introduction
- MLA 9
- Ling, Samuel J., et al. University Physics Volume 3. OpenStax, 2016, https://openstax.org/books/university-physics-volume-3/pages/1-introduction.
- Chicago author-date
- Ling, Samuel J., Jeff Sanny, and William Moebs. 2016. University Physics Volume 3. Houston, TX: OpenStax. https://openstax.org/books/university-physics-volume-3/pages/1-introduction.
OpenStax entries are free to read online. Follow the licence shown on each linked source before redistributing or adapting its content.
Reuse the page responsiblyCite this pageAPA, MLA, Chicago, Harvard, BibTeX and RIS
These formats cite this calculator page itself. They are separate from the academic references above, which support the mathematical method and terminology.
APA 7
MW SysArc. (2026, July 21). Quantum State Infidelity Calculator. MW SysArc Tools. https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator
MLA 9
MW SysArc. “Quantum State Infidelity Calculator.” MW SysArc Tools, 21 July 2026, https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator. Accessed 31 Aug. 2026.
Chicago 17
MW SysArc. “Quantum State Infidelity Calculator.” MW SysArc Tools. Published July 21, 2026. Accessed August 31, 2026. https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator.
Harvard
MW SysArc (2026) ‘Quantum State Infidelity Calculator’, MW SysArc Tools. Published 21 July 2026. Available at: https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator (Accessed: 31 August 2026).
BibTeX and RIS records
BibTeX
@misc{mwsysarc_quantum_state_infidelity_calculator_2026,
author = {{MW SysArc}},
title = {Quantum State Infidelity Calculator},
howpublished = {MW SysArc Tools},
year = {2026},
url = {https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator},
note = {Published July 21, 2026; accessed August 31, 2026}
}RIS
TY - ELEC
AU - MW SysArc
TI - Quantum State Infidelity Calculator
T2 - MW SysArc Tools
PY - 2026
DA - 2026-07-21
Y2 - 2026-08-31
UR - https://math.mwsysarc.com/quantum-mathematics/quantum-state-infidelity-calculator
N1 - Published July 21, 2026
ER -Clear answers
Frequently asked questions
What does the Quantum State Infidelity do?
Calculate state infidelity from unit fidelity scale and state fidelity.
How does the Quantum State Infidelity work?
The calculator applies c=a−b. Infidelity is one minus fidelity under the unit probability convention. This page evaluates the relationship directly.
What can I learn from the Quantum State Infidelity?
It connects the mathematical rule to your chosen numbers and shows each calculation step. Change one input at a time to see how the result responds.
Does MW SysArc receive or store what I enter?
No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.
How should I use the result?
Use the steps to understand the method, then verify important school or professional work using the notation and rounding rules required in your setting.
Last reviewed . Calculations tested .