Questions tagged [google-sycamore]
A 54-qubit superconducting quantum processor by Google Quantum AI which is claimed to have been used to demonstrate quantum computational supremacy.
38
questions
1
vote
2
answers
79
views
How can we see on Cirq that Google Sycamore has 54 qubits?
Hello, can you explain how to see in Google Cirq that the figure above is a 54 qubits quantum computer ? thanks
1
vote
1
answer
82
views
Current situation of quantum computing with respect to physical vs logical qubits
As an example I'm going to start with Google and IBM. Google has the Sycamore processor right now with 53 physical qubits. However I haven't found any info on how many logical qubits it can actually ...
2
votes
1
answer
406
views
Is there something wrong with cross-entropy benchmarking, or is it still considered as a reasonable path towards quantum supremacy?
My question is strongly related with this one. Google's quantum supremacy claim uses Random Circuit Sampling. The principle is the following one: a realistic noise model for random circuits performed ...
1
vote
2
answers
479
views
Sycamore 2 versus Osprey
Google recently hit key milestone by reducing errors: https://www.nature.com/articles/d41586-023-00536-w
I would like to know why Google's QPU had way fewer qubits than IBM's Osprey and if IBM also ...
8
votes
0
answers
284
views
What is a gate-level circuit used in the 2022 Jafferis et al. experiment on Sycamore?
A recently published Nature paper of Jafferis et al. describes an experiment with a handful of qubits performed on Google's Sycamore processor to explore the SYK model in the context of AdS/CFT and ...
7
votes
1
answer
276
views
Publicly available samples for quantum circuits and/or simulators
With Yosi Rinott and Tomer Shoham we studied various statistical aspects of samples coming from NISQ computers.
My question is about available data consisting of samples from NISQ computers
We would ...
15
votes
1
answer
538
views
Status of Google's quantum supremacy claim 2022
More than a year ago a couple of scientists made a splash by presenting a classical algorithm that took less than a week to simulate Sycamore's circuits on a small GPU cluster. Also, their simulations ...
2
votes
0
answers
90
views
Understanding the supremacy regime plot in Google's "Quantum supremacy using a programmable superconducting processor"
I was going through the Google's 2019 paper & had difficulties regarding some details.
How are they calculating XEB in quantum supremacy regime? To calculate the XEB,we also need the ideal ...
9
votes
0
answers
191
views
How can time crystals be useful in qRAM design?
A time crystal is a phase of a matter which is ordered in time, similar to classical crystals which are ordered spatially. In other words, the structure of a time crystal is ever-changing but with ...
6
votes
1
answer
685
views
What is the basic hardware gate library in the IBM & google?
I need to know what is the basic hardware gate library in hardware IBM and Google? I mean, which one of the gates can be implemented directly in the hardware. I would be very grateful if everyone ...
2
votes
1
answer
402
views
Can Google Sycamore's benchmark for quantum supremacy be simulated on Qiskit?
In 2019, Google claimed that they have achieved quantum supremacy/advantage with their 53 qubit quantum processor Sycamore. The paper is here. But I have not even been able to find what their ...
3
votes
1
answer
171
views
What determines the repetition rate in Google's Weber datasheet?
The second page of the datasheet of Google's Weber system mentions a repetition rate. How is this repetition rate calculated?
https://quantumai.google/hardware/datasheet/weber.pdf
I understand that ...
1
vote
0
answers
399
views
Does a quantum computer exist today? [closed]
I agree that this may not be an easy question to answer.
But lately, I increasingly come across the fact that many news materials and research papers in the field of quantum technologies say that at ...
2
votes
2
answers
220
views
Is there a quantum processor with physically implemented Toffoli gate?
Recently, I came across the article Realization of efficient quantum gates with a superconducting qubit-qutrit circuit where its authors proposed a physical implementation of three qubits quantum ...
7
votes
3
answers
3k
views
How are the IBM's and Google's Hadamard gates fabricated and operated?
There are thousands of articles, books and web sites describing the Hadamard Gate from a theoretical point of view.
But I haven't been able to find any photo about any real implementeation of a ...