Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Palgrave Macmillan UK eBooks

Problems

Jennifer Trusted

Published Jan 1, 1999• 0 citations
Publisher

Abstract

In classical physics there is, and always will be, a lack of precision in measurement. We cannot measure any quantity with absolute accuracy so any size, any weight, any velocity, any position, any time must always be stated within certain limits of error. Today we can make such measurements extremely accurately, but not with infinite accuracy. Yet this, though not entirely a practical problem, is practical to the extent that we can always aspire to achieve an accuracy which is sufficient for the purpose in hand. In theory we can go on refining our measurements indefinitely. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

DOI
10.1057/9780230597211_9

Related papers

PHYSICS

Donald E Simanek, John. Holden

At the close of the 19th century many physicists confidently assumed that nothing fundamentally new remained be discovered. Physicists were confident that if all aspects of any physical system were measured to perfect accuracy then physical laws could also be known perfectly and the future of that system could be mathematically predicted exactly. So all that was left for physicists to do was to improve measurements, pushing toward ever more decimal places of accuracy.

CRC Press eBooks•Oct 1, 2001•0 citations

Slow, Stored and Stationary Light

Michael Fleischhauer, Gediminas Juzeliūnas

Slow light has received growing interest since 1999 when the propagation velocity of light was reduced in an experiment to 17 m/s, i.e. almost 20 million times slower than in vacuum. Two years later light pulses were stopped, or more specifically stored in an atomic medium and subsequently released after some time. This provided the basis for important applications in photon-based quantum information technology. The present chapter explains what slow light is and what it is good for, how to understand the physics of it and how one can practically make light go so slow. To answer these questions, the chapter uses simple pictures, on the one hand, and supplements them with a little bit of details, on the other hand, for those who want to go slightly deeper into the field. The chapter also discusses more recent generalizations of slow light, such as stationary and spinor slow light which are interesting model system and can be used to understand more complex quantum systems. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Springer eBooks•Jan 1, 2016•9 citations

Entanglement of Formation

William K. Wootters

At least three distinct information-theoretic measures of quantum entanglement have been proposed in recent years. This paper highlights one of them, the entanglement of formation, as well as a related quantity called the tangle. The tangle can be used to express a simple law of entanglement, limiting the extent to which a single qubit may be simultaneously entangled with each of two other qubits. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Kluwer Academic Publishers eBooks•Dec 19, 2005•1 citation

Can we make precision measurements more precise

James K. Thompson, S. Sankar, Zilong Chen

Bulletin of the American Physical Society•May 31, 2008•0 citations

Moving Potentials and the Completeness of Wave Operators. Part II: Propagating Observables on Scattering States

Hagen Neidhardt

The paper is devoted to the time evolution of the position and impulse operators as well as certain functions of them, for example the dilation and classical kinetic energy operator, in quantum mechanical scattering theory with time-dependent and travelling along fixed trajectories long range potentials. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Birkhäuser Basel eBooks•Jan 1, 1990•2 citations

On the Complexity of Measurement in Classical Physics

Edwin J Beggs, José Félix Costa, Bruno Loff +1 more

Springer eBooks•Apr 29, 2008•14 citations
In classical physics there is, and always will be, a lack of precision in measurement. We cannot measure any quantity with absolute accuracy so any size, any weight, any velocity, any position, any time must always be stated within certain limits of error. Today we can make such measurements extremely accurately, but not with infinite accuracy. Yet this, though not entirely a practical problem, is practical to the extent that we can always aspire to achieve an accuracy which is sufficient for the purpose in hand. In theory we can go on refining our measurements indefinitely. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Slow light has received growing interest since 1999 when the propagation velocity of light was reduced in an experiment to 17 m/s, i.e. almost 20 million times slower than in vacuum. Two years later light pulses were stopped, or more specifically stored in an atomic medium and subsequently released after some time. This provided the basis for important applications in photon-based quantum information technology. The present chapter explains what slow light is and what it is good for, how to understand the physics of it and how one can practically make light go so slow. To answer these questions, the chapter uses simple pictures, on the one hand, and supplements them with a little bit of details, on the other hand, for those who want to go slightly deeper into the field. The chapter also discusses more recent generalizations of slow light, such as stationary and spinor slow light which are interesting model system and can be used to understand more complex quantum systems. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
At least three distinct information-theoretic measures of quantum entanglement have been proposed in recent years. This paper highlights one of them, the entanglement of formation, as well as a related quantity called the tangle. The tangle can be used to express a simple law of entanglement, limiting the extent to which a single qubit may be simultaneously entangled with each of two other qubits. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.