Quantum decoherence

  title={Quantum decoherence},
  author={Maximilian Schlosshauer},
  journal={Physics Reports},

Quantifying Decoherence via Increases in Classicality

This work introduces two quantifiers of classicality via the Jordan product and uncertainty, respectively, and then employs them to quantify decoherence from an information-theoretic perspective and studies the influence of the system on the environment.

Decoherence predictions in a superconducting quantum processor using the steepest-entropy-ascent quantum thermodynamics framework

The current stage of quantum computing technology, called noisy intermediate-scale quantum (NISQ) technology, is characterized by large errors that prohibit it from being used for real applications.

Gravitational decoherence of dark matter

Decoherence describes the tendency of quantum sub-systems to dynamically lose their quantum character. This happens when the quantum sub-system of interest interacts and becomes entangled with an

Dissipative dynamics of quantum correlation quantifiers under decoherence channels

In this work, we investigate the dynamics of quantum correlations captured by entropic and geometric measures of discord under the influence of dissipative channels for widely used two qubit X state

Quantum gravitational decoherence from fluctuating minimal length and deformation parameter at the Planck scale

A scheme of gravitational decoherence due to quantum gravity effects is introduced and it is found that theDecoherence rate predicted by the model is extremal, being minimal in the deep quantum regime below the Planck scale and maximal in the mesoscopic regime beyond it.

Decoherence from general relativity

It is of great interest to explore matter in nontrivial quantum arrangements, including Schrödinger cat-like states. Such states are sensitive to decoherence from their environment. Recently, in Ref.

No Intrinsic Decoherence of Inflationary Cosmological Perturbations

After a brief summary of the four main veins in the treatment of decoherence and quantum to classical transition in cosmology since the 1980s, we focus on one of these veins in the study of quantum

Protective measurement of open quantum systems

We study protective quantum measurements in the presence of an environment and decoherence. We consider the model of a protectively measured qubit that also interacts with a spin environment during

Emergent classicality in general multipartite states and channels

It is shown that for any evolution of the system and environment, for everywhere in the environment excluding an O(1)-sized region the authors call the "quantum Markov blanket," any locally accessible information about the system must be approximately classical, i.e. obtainable from some fixed measurement.



Decoherence and the Appearance of a Classical World in Quantum Theory

In the last decade decoherence has become a very popular topic mainly due to the progress in experimental techniques which allow monitoring of the process of decoherence for single microscopic or

Decoherence and the Foundations of Quantum Mechanics

This is an introduction to decoherence with an emphasis on the foundational and conceptual aspects of the theory. It explores the extent to which decoherence suggests a solution to the measurement

Decoherence and the quantum-to-classical transition

Introducing Decoherence.- The Basic Formalism and Interpretation of Decoherence.- Decoherence Is Everywhere: Localization Due to Environmental Scattering.- Master-Equation Formulations of

Course 8: Environment-Induced Decoherence and the Transition from Quantum to Classical

We study dynamics of quantum open systems, paying special attention to these aspects of their evolution which are relevant to the transition from quantum to classical. We begin with a discussion of

Decoherence of quantum superpositions through coupling to engineered reservoirs

Decoherence is induced by coupling the atom to engineered reservoirs, in which the coupling and state of the environment are controllable, and the decoherence rate scales with the square of a quantity describing the amplitude of the superposition state.

Classical decoherence in a nanomechanical resonator

Decoherence is an essential mechanism that defines the boundary between classical and quantum behaviours, while imposing technological bounds for quantum devices. Little is known about quantum

Decoherence, einselection, and the quantum origins of the classical

as quantum engineering. In the past two decades it has become increasingly clear that many (perhaps all) of the symptoms of classicality can be induced in quantum systems by their environments. Thus

Decoherence of matter waves by thermal emission of radiation

Good quantitative agreement is found between the experimental observations and microscopic decoherence theory of matter wave interferometer experiments in which C70 molecules lose their quantum behaviour by thermal emission of radiation.

Quantum decoherence of phonons in Bose–Einstein condensates

We apply modern techniques from quantum optics and quantum information science to Bose–Einstein condensates (BECs) in order to study, for the first time, the quantum decoherence of phonons of