Index

361 indexed terms, assembled by scripts/assemble_appendices.py from every chapter's key_terms front matter. Numbers are chapters, not pages.

A term's first chapter is usually where it is defined; later chapters are where it is used, complicated, or measured. Several terms appear in a chapter that contradicts an earlier one — that is deliberate, and following the whole chain is the point.

A

abort threshold — 38
active space — 36
adiabatic limit — 37
adjoint — 15
aer — 7
aer simulator — 2
alapscheduleanalysis — 31
all-to-all connectivity — 17
amplitude — 3
amplitude amplification — 21
amplitude damping — 11
amplitude encoding — 32
analog hamiltonian simulation — 17
ancilla — 19
angle encoding — 32
ansatz — 8, 16, 24
api token — 2
append — 8
apply_layout — 7
approximate qft — 22
approximation degree — 28
approximation ratio — 24, 37
assignment matrix — 13
authentication precondition — 38
automatic differentiation — 16

B

backend — 2, 12
barren plateau — 16, 24, 32
barrier — 8
basis encoding — 32
basis gates — 10
basis rotation — 5
basis state — 3
batch — 7, 12
batch mode — 39
batched qnode evaluation — 33
bb84 — 38
bell measurement — 9
bell state — 2, 4
bernstein-vazirani — 20
big-endian — 14
binding — 8
bit-flip code — 25
black box — 19
blind test — 27
bloch sphere — 3
blueprint circuit — 8
bond dimension — 11
boolean oracle — 19
born rule — 5
braket — 17
bravyi-kitaev — 36
break-even point — 25

C

calibration data — 12
calibration staleness — 29
ccsd(t) — 36
chemical accuracy — 24, 36
chi-squared test — 5
circuit bisection — 26
circuit knitting — 35
circuit library — 8
cirq — 14
claim audit — 40
classical feedforward — 9
classical reduction — 23
classical shadows — 35
classical simulation boundary — 35
clifford twirl — 30
clifford+t — 19
clopper-pearson interval — 5
clops — 30
cnot — 4
code blindness — 25
code distance — 15
coherence budget — 31
commutativecancellation — 28
compose — 8
computational basis — 5
concurrence — 4
confidence interval — 5
continued fractions — 23
controlled — 15
controlled gate — 4
controlled-phase rotation — 22
convex training — 34
counting qubits — 22
counts — 2
coupling map — 10, 29
cross-entropy benchmarking — 30
custom gate — 8

D

dag — 7, 10
data re-uploading — 33
dead link — 29
debugging blindness — 26
decision procedure — 12
density matrix — 11
deployable claim — 33
depolarizing error — 11
dequantization — 35
deutsch-jozsa — 20
diffuser — 21
dt — 31
dynamic circuit — 6, 9
dynamical decoupling — 13, 31

E

edge error — 29
electronic structure problem — 36
encoding cost — 32
endianness — 18
entanglement — 1, 4
entanglement pattern — 8
equal-budget comparison — 35
error correction — 13, 40
error distribution — 30
error mitigation — 13
estimator — 7
execution metadata — 39
expectation value — 5
exponential separation — 20

F

falsification condition — 40
feature map — 34
fidelity — 11
flaky test — 27
framework — 1
framework selection — 18
full configuration interaction — 36
function — 15
functor — 15

G

gate count vs fidelity — 28
gate definition — 6
gate duration — 31
gate error — 12
gate folding — 13
gateset — 14
general number field sieve — 23
ghz state — 4
global phase — 3, 6
goemans-williamson — 24, 37
gpi — 17
gradient variance — 16, 32
gram matrix — 34
gridqubit — 14
grover's algorithm — 21

H

hadamard gate — 3
hardware-aware programming — 29
hartree-fock — 24
harvest-don't-recall — 40
heavy-hex — 29
hidden subgroup — 20
hybrid loop — 24
hybrid loop latency — 35

I

if_test — 9
inference cost — 33
input problem — 32
insertstrategy — 14
interchange format — 6
interference — 3, 20
intermediate representation — 6
interoperability — 18
isa circuit — 7, 10
ising mapping — 37
iteration count — 21

J

job — 12
jordan-wigner — 36

K

kernel concentration — 34
key expansion — 38

L

latency — 9
layout — 7, 10
layout roulette — 39
layout scoring — 12
layout selection — 29
linequbit — 14
lingua franca — 18
localsimulator — 17
logical error rate — 25
logical qubit — 25
logical vs physical qubit mapping — 26

M

m3 — 13
magic state — 15
marginal distribution — 5
matrix product state — 11
maxcut — 37
measurement — 1, 5
metamorphic testing — 27
mid-circuit measurement — 9
mixer hamiltonian — 37
modality — 17
modular exponentiation — 23
moment — 14
multi-controlled x — 19
multinomial distribution — 5
multiple comparisons — 5
mølmer–sørensen gate — 17

N

n-squared scaling — 34
negative result — 40
neutral atom — 17
nisq — 1
no-cloning theorem — 38
noise model — 11

O

observable — 5
openqasm — 6, 18
operation — 15
operator.from_circuit — 26
optimality certificate — 37
optimization level — 10, 28
optimizer — 16
oracle — 19, 21
order finding — 23
over-rotation — 21

P

parameter — 8
parameter-shift rule — 16
parameterexpression — 8
parametervector — 8
paramresolver — 14
partial trace — 4
pass — 10
pass introspection — 28
pass manager — 2, 7, 10
pauli operator — 5
pauli weight — 36
pennylane — 16
per-minute pricing — 39
per-shot pricing — 39
period finding — 23
phase estimation — 22
phase gate — 3
phase kickback — 19
phase oracle — 19
phase-flip code — 25
physical qubit — 6
portability — 18
positive semidefinite — 34
post-quantum cryptography — 23, 38
precision — 7
prefix inspection — 26
preflight check — 12
preset pass manager — 28
primitive — 1, 2, 7
privacy amplification — 38
probabilistic error cancellation — 13
product state — 4
promise problem — 20
property-based testing — 27
pulse-level control — 31
purity — 11

Q

q# — 15
qaoa — 24, 37
qber — 38
qft — 22
qiskit.pulse removal — 31
qnode — 16
qpe — 22
quadratic speedup — 21
quantum advantage — 1
quantum circuit — 1
quantum cloud platform — 39
quantum data — 35
quantum data advantage — 40
quantum fourier transform — 22
quantum kernel — 34
quantum software stack — 1
quantum volume — 30
qubit — 1
qubit release — 15
qubit reuse — 9
qubit-wise commuting — 5
query complexity — 19, 20
queue latency — 39
quoted fidelity — 30

R

randomized benchmarking — 30
readout error — 2, 11, 12
readout mitigation — 13
readout problem — 22
reduced state — 4
register — 6
relative phase — 3
repeat-until-success — 9
replication — 33
reproducibility — 39
reset — 9
resource estimation — 15
rotation gate — 3
rotation synthesis — 22
round trip — 6
routing — 10
rsa — 23
rule of three — 5

S

sabre — 10
sampler — 7
samplerv2 — 2
sampling error — 5
sampling overhead — 13
seam — 26
second quantization — 36
seed variance — 28
seed_transpiler — 10
semidefinite relaxation — 37
serialization — 6
session — 7, 12
session mode — 39
shape factor — 5
shor's algorithm — 23
shot — 5
shot budget — 24
shot-noise floor — 27
shots — 1, 2
sifting — 38
simon's algorithm — 20
simulation method — 7, 11
stabilizer — 11
stabilizer code — 25
standard error — 5
statevector — 3, 11
statevector inspection — 26
statistical power — 5
statistical significance — 40
stdgates — 6
superdense coding — 9
superposition — 1, 3
surface code — 25
survival probability — 30
swap — 4
swap insertion — 10
sweep — 14
sycamore — 14
syndrome extraction — 25

T

t factory — 15
t1 — 12
t2 — 12
teleportation — 9
template — 16
tensor product — 4
thermal relaxation — 11
threshold — 25
toffoli gate — 4
tolerance — 27
total variation distance — 5, 27
train/test split — 33
translation loss — 18
transpilation — 1, 10
transpilation verification — 26
transpile — 2
trapped ion — 17
trusted node — 38
tuned baseline — 40
twirling — 13
two error rates — 27

U

uncomputation — 19
unitary — 3
universality — 33
unstructured search — 21
usable path — 29
use block — 15
utilization — 39

V

variational circuit — 16
variational quantum classifier — 32
verbatim box — 17
virtual environment — 2
virtual z gate — 31
vqe — 24

W

w state — 4
wilson interval — 5

Z

zero-noise extrapolation — 13