Why will we never use Quantum computers at home or in our offices?
1. Non Repeatable; non-Replicable Answers ! Quantum computing has an outrageously poor Qubit Error rate of about 1 error in every 1,000 operations (vs classical computer error rate of ~ 1 error in a sextillion operations).
This is Fatal and incurable BECAUSE Quantum computer’s Probabilistic operations are inherently non-Deterministic – diplomatically called “Noisy.**”
And “Error correction” schemes are —
1 a) Classical – not Quantum (I’m trying not to laugh), and
1 b) Based on the Pooling of Ignorance principle — “In quantum error correction, multiple faulty qubits are combined to make reliable qubits, called logical qubits…”
1 c) Next to impossible to “… diagnose errors without ever directly observing them…’
Despite all that – could they be used for estimating? Questions where exact, correct (non-wrong) answers are not needed. (Obviously not decryption which demands deterministic exactness.)
2a No Quantum RAM exists to store Qubits – either momentarily or long-term (Fatal)
(According to the no clone theorem, no quantum state can be reproduced completely meaning we cannot make quantum RAM)
2b And one Can’t use non-quantum hybrid RAM because logically we can’t read or transfer quantum data to conventional RAM – thanks again to the no clone theorem.
3. Quantum processors need to run at near Absolute Zero temperature (at minus 459 degrees F) (Kind of eliminates “outside the lab” use. Fatal) & . . .
4. Hoover Sucks: Quantum processors need to run in an “absolute Vacuum” (No “outside the lab” use. If not Fatal, it is in Intensive Care on life-support.)
5 “Eye-watering cost” of a quantum processor (bad, but not necessarily fatal or eventually incurable)*
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Notes
* So far some $40 Billion has been spent for Quantum computing and anther 25 billion committed.
** Noise is not just quantum probabilities. It is also caused by any exterior phenomena like temperatures above Absolute Zero, data cable / conductor RF noise, and random cosmic rays.
Some further reading —
How Far Can Quantum Computing Go without Quantum Memory?
Why the Challenges of Quantum Physics May Deny Quantum Computing a Commercial Future
Why Quantum Computers Will Never be a Threat to Encryption
The Qubit Noise, Scaling & Memory Barriers Remain Insurmountable
More Technical Reading —
Why Quantum Computers Cannot Work – UC Davis
Fixing the Internet’s Fundamental Flaw with Trustworthy Packets
Giving IP Packets a Trusted Identity to Dramatically Improve Internet Security