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The major quantum computing providers that comes to me right the way are usually: IBM Quantum (superconducting qubit) Google Quantum (superconducting qubit) Honeywell Quantum (trapped ions) Rigetti (superconducting qubit) IonQ (trapped ions) The players in this list are primarily focus on two technologies, superconducting and trapped ions. Note that ...


5

The log quantum volume of Quirk ( https://algassert.com/quirk ) is 16, because it has a maximum of 16 qubits and can easily do the ~200 gates that are part of the test circuit. The slowest part will be drawing the result. For state vector simulators that don't impose maximum qubit counts, like qsim, the limit is basically available memory and the size of ...


3

It is a very interesting question. Quantum database would be a correlated collection of entangled ensembles of quantum data structures such as bloom filters, quantum graphs and quantum time series data distributed over quantum stream schema governed by Quantum Turing Machines and Quantum Fields as defined by David Deutsch, Richard Feymann, Yuri Mann among ...


2

I would not say that swap gate changes a topology of a quantum processor as this is given by physical properties of the processor, mainly conectivity among qubits. Swap gate simply switch content of two qubits to overcome non-full connectivity among qubits, hardware topology remains intact. I can imagine that it is possible to group physical qubits into ...


1

I think the answers for all the questions are yes, they are possible. Of course that won’t be possible if the gates you want to operate simultaneously act on same qubits, for example, single qubit gate on Qubit 0 and two qubit gate on qubit 0 & qubit 1. How one enforce such simultaneous operations is a different question. If you use Qiskit Pulse, you can ...


1

The length of the loops determines the quantity called the code distance. The key fact about its effect on the function of the code is the exponential suppression of errors. More precisely, if $d$ is the code distance and $\epsilon_P$ is the physical qubit error rate then the logical qubit error rate $\epsilon_L$ is $$ \epsilon_L \approx c_1 \left(c_2\frac{\...


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