ISSN:0002-9505    

DOI:10.1119/1.18483

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18515

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18516

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18517

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18484

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

This Resource Letter provides a brief introduction and an annotated guide to the literature about the roles of quantum coherence in quantum optics. Books, conference proceedings, and selected journal articles are listed for the following topics: Early history, lasers, in particular novel systems such as lasers without inversion, nonclassical states of light including squeezed states, cavity quantum electrodynamics, cooling and trapping of atomic samples, atom optics, and quantum optical tests of the foundations of quantum mechanics.

ISSN:0002-9505    

DOI:10.1119/1.18509

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

The stability of the Levitron®cannot be explained if the top’s axis has a fixed direction in space. Stability against flipping is not enough. Gyroscopic precession around the local magnetic field direction is necessary. An analysis and numerical integration of the equations of motion for an experimental stemless top that includes gyroscopic precession around the local magnetic field lines predict that the top will be supported stably up to spin speeds of about 3065 rpm. An upper spin limit of 2779 rpm for this top is observed experimentally and explained as an adiabatic condition. Spin stabilized magnetic levitation is a macroscopic analog of magnetic gradient traps used to confine particles with a quantum magnetic moment.

ISSN:0002-9505    

DOI:10.1119/1.18488

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

The stability of the nuclear fusion reaction in a star is due to the negative specific heat of the system. Examining the literature one gets the impression that this phenomenon results from a complicated interplay of the various pertinent field variables. We introduce a simple model system, which displays the same behavior as a star and which can be treated quantitatively without solving any differential equation.

ISSN:0002-9505    

DOI:10.1119/1.18486

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

Floating shells illustrate symmetry breaking in a manner readily accessible to experiment. Shells containing some water show the unusual feature of symmetry restoration. The case of an ideal cylindrical shell (a “can”) is analyzed.

ISSN:0002-9505    

DOI:10.1119/1.18510

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

According to a common conception of causality, the truth of a statement that refers only to phenomena confined to an earlier time cannot depend upon which measurement an experimenter will freely choose to perform at a later time. According to a common idea of the theory of relativity this causality condition should be valid in all Lorentz frames. It is shown here that this concept of relativistic causality is incompatible with some simple predictions of quantum theory.

ISSN:0002-9505    

DOI:10.1119/1.18511

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP