Related Experiment Video
Updated: Feb 17, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
9.1K
Dynamical Engineering of Interactions in Qudit Ensembles
Soonwon Choi1, Norman Y Yao2, Mikhail D Lukin1
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|December 9, 2017
Summary
We developed a method to engineer interactions in quantum systems (qudits) using control fields. This technique allows for precise control, enabling advancements in quantum memories and simulators.
Area of Science:
- Quantum Information Science
- Quantum Simulation
- Many-Body Physics
Background:
- Engineering interactions in quantum systems is crucial for quantum technologies.
- Controlling multi-level quantum systems (qudits) presents significant challenges.
- Existing methods lack the precision for complex Hamiltonian engineering.
Purpose of the Study:
- To propose and analyze a method for engineering effective interactions in ensembles of qudits.
- To develop a universal sequence for decoupling interactions in quantum systems.
- To create an efficient algorithm for target Hamiltonian engineering.
Main Methods:
- Analysis of conditions for interaction decoupling in d-level systems.
- Development of a universal decoupling sequence applicable to cancelable interactions.
- Implementation of an efficient algorithm for Hamiltonian engineering.
Main Results:
- A necessary and sufficient condition for interaction decoupling was identified.
- A universal sequence capable of decoupling any cancelable interaction was demonstrated.
- A 6-pulse sequence was designed to decouple spin-1 dipolar interactions.
- A spin-1 Ising chain was engineered for studying topological phase transitions.
Conclusions:
- The proposed method enables precise engineering of interactions in qudit ensembles.
- This work facilitates the creation of advanced many-body quantum memories.
- The method supports the development of programmable analog quantum simulators on existing platforms.
Related Concept Videos
02:35Reaction Quotient
53.6K
The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n B ⇌ x C + y D, the reaction quotient is derived directly from the stoichiometry of the balanced equation as
53.6K
01:18First Law: Particles in Two-dimensional Equilibrium
16.9K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
16.9K
02:20Dynamic Equilibrium
63.6K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
63.6K
01:10First Law: Particles in One-dimensional Equilibrium
8.3K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
8.3K
01:23Stability of Equilibrium Configuration
824
Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
824
01:12Fermi Level Dynamics
763
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...
763