Related Experiment Video
Updated: Jun 15, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
9.6K
Probing Site-Resolved Current in Strongly Interacting Superconducting Circuit Lattices
Botao Du1, Ramya Suresh1, Santiago López1
1Department of Physics and Astronomy, <a href="https://ror.org/02dqehb95">Purdue University</a>, West Lafayette, Indiana 47907, USA.
Physical Review Letters
|August 23, 2024
Summary
Researchers developed a new method to measure particle current in superconducting quantum simulators. This technique reveals site-resolved current and statistics, aiding the study of quantum matter and condensed matter phenomena.
Area of Science:
- Quantum simulation
- Condensed matter physics
- Superconducting circuits
Background:
- Transport measurements are crucial for understanding quantum phenomena like superconductivity.
- Quantum simulators offer a platform to study synthetic quantum matter.
- Measuring particle current in these systems is essential for detailed analysis.
Purpose of the Study:
- To demonstrate a novel method for measuring in situ particle current in superconducting circuit lattices.
- To apply this method to study transport properties in both coherent and bath-coupled lattices.
- To investigate the transition from superfluid to Mott insulator states via current statistics.
Main Methods:
- Utilizing controlled tunneling in a double-well potential to map current to on-site density.
- Preparing a strongly interacting Bose-Hubbard lattice at various fillings.
- Coupling the lattice to engineered driven-dissipative baths for nonequilibrium dynamics.
Main Results:
- Achieved site-resolved measurement of particle current and current statistics.
- Observed changes in current statistics during the superfluid-to-Mott insulator transition.
- Detected steady-state current in discrete channels and interaction-assisted transport in driven-dissipative systems.
Conclusions:
- Established a versatile platform for microscopic quantum transport investigations in superconducting circuits.
- Demonstrated the utility of current measurements for probing many-body physics in quantum simulators.
- Opened new avenues for studying nonequilibrium phenomena in synthetic quantum matter.
Related Concept Videos
02:54Trends in Lattice Energy: Ion Size and Charge
23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K
01:24Superconductor
1.1K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.1K
01:28Types Of Superconductors
954
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
954
01:27Electrostatic Boundary Conditions in Dielectrics
1.1K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.1K
01:13Magnetic Force Between Two Parallel Currents
3.5K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
3.5K
01:23Magnetic Field due to Moving Charges
8.5K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
8.5K