9
votes
Accepted
Is there a classical limit to quantum computing?
In simpler terms your question is: if noise/decoherence keeps entering the computation, how can a big computation possibly survive?
The key concept you're missing is quantum error correction, which ...
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7
votes
Scalability of ion trap quantum computers
You may want to check out this Schaetz et al, Reports on Progress in Physics of 2012 "Experimental quantum simulations of many-body physics with trapped ions" (alternate link in semanticscholar). In ...
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6
votes
Scalability of ion trap quantum computers
While I’m not an experimentalist, and have not studied these systems in any great depth, my (crude) understanding is the following:
In ion traps you (more or less) have to trap the ions in lines. ...
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3
votes
Comparing technical limitations of major quantum computing approaches
For a general overview about hardware and the difficulties they present, I recommend section three of Quantum Computing: An Overview Across the System Stack. Another good introduction would be Quantum ...
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3
votes
Accepted
Is there any company trying out ion trap qubits?
IonQ, Honeywell, and Infineon Technologies (list here).
From my understanding, IonQ and Honeywell seem to be leading in the trapped ion space
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How can one trapped ion physically represent quantum states?
The ion states are the different energy states of the ion. These different energy states can be denoted with the total
spin of the ion and the phonon levels of the ion.
If we look at a Helium atom ...
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vote
Modular exponentiation quantum circuit design for Shor's algorithm
There are many quantum implementations of modular exponentiation to choose from depending on whether you want to optimize qubit count vs time and other similar tradeoffs.
However, for the method ...
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Simultaneous computational basis measurement
Before we explain how ion traps and superconducting qubits are measured, let's clarify what's meant by a basis, as that might reduce some confusion about simultaneous measurements.
Following up on the ...
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