Related Experiment Video
Updated: Mar 8, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
15.1K
Perfect Wave Transfer in Continuous Quantum Systems
Per Moosavi1, Matthias Christandl2, Gian Michele Graf3
1Stockholm University, Department of Physics, 10691 Stockholm, Sweden.
Physical Review Letters
|March 6, 2026
Summary
Researchers explored perfect information transfer in continuous quantum systems. Conformal invariance is key for perfect wave transfer, with implications for quantum computing and interacting theories.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Field Theory
Background:
- Information transfer is crucial for quantum computing.
- Discrete systems like spin chains allow perfect qubit transfer.
- Continuous systems present unique challenges for information transfer.
Purpose of the Study:
- Investigate perfect information transfer in continuous quantum systems.
- Compare information transfer in systems with and without conformal invariance.
- Extend findings to interacting quantum theories.
Main Methods:
- Analysis of wave propagation in continuous systems.
- Characterization of perfect wave transfer (PWT) via inverse spectral problems.
- Application of bosonization techniques to interacting bosonic theories.
Main Results:
- Continuous systems with conformal invariance exhibit perfect wave transfer (PWT).
- PWT in non-conformal systems is linked to solutions of inverse spectral problems.
- Bosonic theories demonstrate the importance of conformal invariance for PWT.
Conclusions:
- Conformal invariance is a critical factor for perfect information transfer in continuous quantum systems.
- The study provides a framework for achieving PWT in both non-interacting and interacting theories.
- Findings broaden the applicability of perfect information transfer to diverse quantum systems.
Related Concept Videos
02:32The de Broglie Wavelength
34.1K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
34.1K
01:07Propagation of Waves
3.1K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
3.1K
01:28Standing Waves in a Cavity
1.6K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.6K
01:17Continuous Charge Distributions
8.6K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
The electric charge can also be subjected to an analogical...
8.6K
01:11Continuous -time Fourier Transform
1.0K
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
1.0K
01:07Interference and Superposition of Waves
7.3K
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
7.3K