Related Experiment Video
Updated: Jul 2, 2026
09:23
Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
Published on: July 2, 2012
20.4K
The carbon nanotube gatemon qubit.
H Riechert1, S Annabi1, A Peugeot1,2
1Laboratoire de Physique de la Matière Condensée, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
Nature Communications
|August 5, 2025
Summary
Researchers demonstrate coherent control of a gatemon qubit using a single carbon nanotube. This breakthrough achieves record coherence times, positioning carbon nanotubes as promising for quantum technologies and studying quantum conductors.
Area of Science:
- Quantum Computing
- Condensed Matter Physics
- Materials Science
Background:
- Gate-tunable transmon qubits (gatemons) are crucial for quantum computing.
- Current gatemons utilize extended conductors like semiconductors or graphene.
- Implementing gatemons with novel materials is essential for advancing quantum technologies.
Purpose of the Study:
- To demonstrate coherent control of a gatemon qubit using a single carbon nanotube.
- To investigate the performance and coherence of carbon nanotube-based qubits.
- To explore the potential of carbon nanotubes in quantum information processing.
Main Methods:
- Fabrication of a gatemon qubit integrated with a single carbon nanotube using circuit quantum electrodynamics architecture.
- Utilizing a hexagonal boron nitride substrate for ultraclean integration.
- Characterization of qubit spectrum tuning via gate voltage and investigation of decoherence mechanisms.
Main Results:
- Successful coherent control of a gatemon qubit based on a single carbon nanotube.
- Achieved record coherence times of 200 ns for carbon nanotube qubits.
- Identified gate dependence and charge noise as key decoherence factors.
Conclusions:
- Carbon nanotubes are viable candidates for future quantum technologies.
- The study provides a platform for investigating fermionic processes in low-dimensional quantum conductors.
- Ultraclean integration techniques are vital for high-performance molecular qubits.
More Related Videos
Related Concept Videos
00:54Electron Behavior
Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
01:04¹³C NMR: ¹H–¹³C Decoupling
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
01:09Electron Behavior
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
01:19Thomson's e/m Experiment
In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...