CA STATEVECTOR · LIVE

Qrawler

MOVE 0   JOB 1   · 3 QUBITS · 72 SETTINGS
$QRAWLERCA at launch
DRAG TO ORBIT
LAST MEASUREMENT
—
—
SCROLL
01
The loop

Sense, circuit, measure, step

Every 0.8 seconds the crawler's position in the chamber selects one of 72 sensor settings. The next unused shot of the step circuit at that setting is taken from the current job, and the three bits are the step. The crawler has no other source of decisions.

SENSE INPUTS
d · distance
—
α · angle
—
z · depth
—
setting
—
CIRCUIT 3 QUBITS
θa
—
θb
—
φ = α
—
θc
—
MEASURE —
exactmeasured

Exact: the circuit's probabilities at this setting, from the state vector. Measured: the shots drawn for it in the current job, as they are used. With 42 shots per setting the two never match exactly.

STEP LAST 48
crawlleftrightpause
+ burrow
outcome
—
job
—
setting · shot
—
02
The machine

One job at a time, the next one already in the queue

A job is the step circuit over all 72 settings, 42 shots each: 3 024 measured bitstrings. The crawler uses them one by one. When fewer than 1 500 are left, the next job is prepared so the queue never runs dry.

CURRENT JOB DONE · IN USE
—
no.
—
backend
statevector
qubits
3 · simulated
settings
72 × 42 shots
readout model
—
—
NEXT JOB NOT YET
prepared when fewer than 1 500 shots are left
TOTALS SINCE START
—JOBS
—MEASUREMENTS
—STEPS
—HOLDERS TOUCHED
—CRAWL / LEFT / RIGHT / PAUSE · BURROW
03
Trace

Where the measurements took it

The chamber from above and from the side with the last 2 400 steps, and the outcome mix minute by minute. Every point on the path has a job, a setting and a shot behind it.

FROM ABOVE LAST 2 400 STEPS
FROM THE SIDE DEPTH
OUTCOMES PER MINUTE LAST 40 MINUTES
04
Jobs

Every job the crawler has used

Job ids as the runtime reports them and what came back from each: 3 024 shots over 72 settings.

nojob idbackendpreparedstateshotsusedcrawlleftrightpauseburrow
05
The coin

What the crawler does with the fees

Holders are glowing points on the chamber floor; when the crawler passes over one, that wallet is touched. Every 10 minutes one more qubit is measured, once, in superposition. |0⟩ buys the coin back on the open market. |1⟩ sends the fees to every holder the crawler touched that shift.

DECISIONS —
notimeoutcomeactiontouchedstatus
THE DECISION CIRCUIT 1 QUBIT · 1 SHOT
q0H
|0⟩
buy back
|1⟩
fees to touched holders
holders on the floor
—
touched this shift
—
next decision
—
06
How it decides

Three qubits, eight outcomes

Qubit 0 decides between keeping straight and turning. Qubit 1 is read through interference: in the turning branch it picks the side, in the straight branch it picks between crawling on and pausing. Qubit 2 switches the crawler between burrowing down and surfacing.

THE CIRCUIT STATEVECTOR
THE SETTINGS
θa = 0.62 + 1.70 d · nearer the wall, more turns
θb = 1.10 − 0.30 d · how decisive the readout is
φ = α · the angle to the centre, as a phase
θc = 0.50 + 1.40 |z| · nearer the floor or the deep, more switches

P(right | turn) = (1 − sin θb · sin α) / 2
P(pause | straight) = (1 − sin θb) / 2
P(burrow) = sin²(θc / 2)
72 SETTINGS 3 DEPTH BANDS · 4 DISTANCE ROWS · 6 HEADING SECTORS · COLOUR: SHARE OF TURNS
click a tile for its distribution