Related Experiment Video
Updated: Feb 28, 2026
05:30
Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
Published on: September 8, 2023
1.2K
Continuous-variable fault-tolerant quantum computation under general noise
Takaya Matsuura1,2, Nicolas C Menicucci3, Hayata Yamasaki4,5
1Centre for Quantum Computation & Communication Technology, School of Science, RMIT University, Melbourne, VIC, Australia. takaya.matsuura@riken.jp.
Nature Communications
|February 26, 2026
Summary
Continuous-variable (CV) quantum computation now has a fault-tolerant threshold against general Markovian noise. This breakthrough utilizes the Gottesman-Kitaev-Preskill code, enabling robust quantum error correction in CV systems.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Quantum Error Correction
Background:
- Continuous-variable (CV) quantum error correction offers flexibility and noise resistance.
- Current fault tolerance theory in CV systems is limited, restricting correctable noise models.
Purpose of the Study:
- To establish a general strategy for translating CV system noise into logical qubit noise.
- To demonstrate a fault-tolerant threshold for CV quantum computation against general Markovian noise.
Main Methods:
- Utilized the Gottesman-Kitaev-Preskill code to translate CV noise into logical qubit noise.
- Introduced a novel noise parameterization to analyze noise strength bounds.
- Applied the threshold theorem for concatenated codes against Markovian noise.
Main Results:
- Markovian noise in CV systems translates to Markovian noise in logical qubits via the Gottesman-Kitaev-Preskill code.
- An upper bound on the resulting logical noise strength was analyzed.
- A fault-tolerant threshold against general Markovian noise for CV quantum computation was established.
Conclusions:
- The study closes a critical gap in CV quantum computation theory.
- Achieving fault tolerance in CV systems requires careful management of quantum state energy.
Related Concept Videos
00:59Propagation of Uncertainty from Random Error
2.0K
An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
2.0K
01:10Propagation of Uncertainty from Systematic Error
1.5K
The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
1.5K
02:45The Quantum-Mechanical Model of an Atom
60.2K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
60.2K
01:12Fermi Level Dynamics
845
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
845
01:10Entropy Change in Reversible Processes
3.3K
In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
3.3K
01:00Detection of Gross Error: The Q Test
7.1K
When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...
7.1K