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

Studies in aeronomy, astrophysics, and astronomy, and, Fluctuations, noise and quantum electronics

Edwards, PJ

Published Jan 1, 2002• 0 citations
Publisher

Abstract

The sixty publications selected for this thesis cover a period of forty years, from my time as a PhD student in the Physics Department of the University of Tasmania up to the present in 2002 as founding Professor of Electronic Engineering and Applied Physics and Director of the Centre for Advanced Telecommunications and Quantum Electronics at the University of Canberra. Many of the papers have been co-authored with research students and associates whose valued contributions I have acknowledged below. Unless otherwise stated I have only included accounts of work in which I have played a leading part. I have divided the papers, in some cases somewhat arbitrarily, into two groups which reflect my interests over this period: (a) Aeronomy, Astrophysics and Astronomy, and (b) Fluctuations, Noise and Quantum Electronics. Within these two groups I have attempted a further subdivision in which I have selected and presented papers to illustrate the development of specific concepts and lines of approach, usually in chronological order. This has meant the inclusion of a number of abstracts, short papers and two patent descriptions. (a) AERONOMY, ASTROPHYSICS AND ASTRONOMY The publications in this section cover a period of twenty seven years, starting with my PhD studies at the University of Tasmania in 1960. They include work performed at the University of Adelaide, the University of Texas at Dallas, the University of Otago and finally at the University of Canberra, prior to the commencement of my Work in the field of quantum electronics and quantum optics in 1989. (b) FLUCTUATIONS, NOISE AND QUANTUM ELECTRONICS The papers in this section have a common theme: the analysis of physical systems and processes in which random and chaotic fluctuations play an important part.

DOI
10.25959/23232860

Related papers

On topics in equilibrium and non-equilibrium statistical physics

Gary Willis

This thesis divides very naturally into three chapters, reflecting the three separate areas I have worked in throughout my PhD studies. During my PhD, I published two papers, one relating to the work in the first chapter, and one to that of the second. At the time of submission, the project which the third chapter relates to was still ongoing, with plans for a future publication. The first chapter discusses work done on the real space renormalisation group (RG) for Ising and Potts models in 2 dimensions. Taking inspiration from Hasenbusch's work, a new framework for carrying out the RG is developed, its computational implementation discussed in some detail, as well as the results for a variety of systems and the implications of these results. The numerical scaling of the procedure and the consequences of this for future work are also covered. The results documented in chapter two are purely theoretical and presented in closed form. The research conducted is to do with properties of free interfaces. The second chapter is by and large critical of previous assumptions which have been made about the so-called wave vector dependent, in order to attempt to experimentally measure it and use these measurements to make further predictions. Using some simple toy models, many of these assumptions are shown to be false. In a sense, the goal of the research presented in the chapter two, is not to motivate further research, but to dissuade research in a direction we consider to be misguided, due to the faulty assumptions it is based on. The third chapter covers a small subset of a project concerned with studying correlations within the so-called Abelian Manna Model. The majority of the project involves (computational) Monte Carlo simulations of the dynamics of such systems, but as these results are not ready to present at the time of writing, the chapter is mainly concerned with some analytical results which were derived in order to validate our models for small systems, explain certain quirky phenomena arising from our simulations, and help quantify errors. Finally, there is an appendix which expands upon various topics from the first two chapters.

•May 1, 2015•0 citations

Problems and Solutions on Quantum Mechanics

Swee Cheng Lim, Choy Heng Lai, L. C. Kwek

This volume is a comprehensive compilation of carefully selected questions at the PhD qualifying exam level, including many actual questions from Columbia University, University of Chicago, MIT, State University of New York at Buffalo, Princeton University, University of Wisconsin and the University of California at Berkeley over a twenty-year period. Topics covered in this book include the basic principles of quantum phenomena, particles in potentials, motion in electromagnetic fields, perturbation theory and scattering theory, among many others.

Major American universities Ph. D. qualifying questions and solutions - physics•Feb 23, 2022•1 citation

Boundaries, disorder and noise in quantum-coherent systems

Oles Shtanko

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2019

•Jan 1, 2019•0 citations

Melvin Lax

R. R. Alfano, H. Z. Cummins, Myriam P. Sarachik +1 more

Melvin Lax, a pioneer in the field of quantum optics, died of cancer on 8 December 2002 at his home in Summit, New Jersey.Born in New York City on 8 March 1922, Lax received his BA in physics from New York University in 1942. He then attended MIT, where he earned two degrees in physics: his SM in 1943 and his PhD in 1947. From 1942 to 1945, he carried out research at the MIT Underwater Sound Laboratory under the direction of Philip M. Morse, Richard H. Bolt, and Herman Feshbach.After receiving his PhD, he took the post of assistant professor of physics at Syracuse University, where he advanced to full professor. In 1955, he joined Bell Telephone Laboratories in Murray Hill, New Jersey, where he worked as a member of the technical staff. During 1962–64, he headed the theoretical physics research department there. He left Bell Labs in 1971 to join the faculty at City College of New York as a Distinguished Professor of Physics, but continued as consultant to Bell Labs’ solid-state electronics research laboratory.Lax’s contributions underlie many aspects of present-day design of optical communication devices. In 1963, he developed a quantum regression theorem and a quantum theory of non-commuting noise sources. His results permitted the calculation of laser spectral line shapes, general photocount distributions, and similar observables. He had a deep and lifelong interest in random processes. Before his death, he had been completing a monograph entitled Random Processes (Oxford U. Press, in press) and had been writing a text on modern quantum optics. He applied the separation of signal and noise to different condensed matter systems. That approach led him to analyze how impurities that are randomly placed in a semiconductor medium or that have randomly varying interaction strength affect the energy levels and hence the medium’s conduction properties. The approach also formed the basis for the so-called coherent potential approximation. Late in life, Lax studied the scattering and transmission of laser light through turbid media such as human tissue. He aimed to devise noninvasive optical diagnostic tools for breast cancer without the drawbacks associated with x-ray use.In 1962, Lax developed a technique to obtain symmetry-related selection rules, including time-reversal, that govern the “go/no-go” alternatives for physical processes—for example, scattering or optical transitions—in crystalline solids. In 1971, with Donald Nelson, he considered the structure of the photoelastic tensor response of a crystal—a problem that had been dormant for more than 80 years—and found that a new physical effect, the antisymmetric microscopic rotations of the atomic constituents, had to be included to explain the experiments. Scientists going back to Friedrich Pockels (in 1893), a founder of the study of optical properties of matter under external fields, had assumed that those effects vanished. As was typical of Lax’s approach, the papers Lax and Nelson subsequently produced were detailed and comprehensive, covering the range from microscopic atomistic force models to macroscopic measurable consequences.The interplay between electronic and vibrational degrees of freedom was a theme that, like random processes, bridged Lax’s earliest work with work he did late in his career. Of particular interest was how that interplay determines the absorption and emission of light and the electrical resistivity of material systems. In his early (1952) papers on the Franck-Condon energy in bulk crystals, he meticulously analyzed the subtle electron-phonon effects. Forty years later, with Wei Cai, he invoked those effects to explain how out-of-equilibrium “hot” electrons and “hot” phonons can interact to give negative carrier mobilities in quantum well, or heterostructure, systems. This was a counterintuitive result.Lax served the physics community in many roles. As a member of the American Physical Society’s publications committee from 1980 to 1982, he was instrumental in helping to create a system for electronic submission and processing of manuscripts. He was ahead of his time in recognizing that he should master computers so he could carry out theoretical physics research. He became so expert in computers that one of his early papers on evaluating Fourier integrals was published in Mathematics of Computation in 1982. He also was on the board of editors of the Physical Review, Quantum Optics , and the International Journal of Modern Physics.In the university setting, Lax had a lasting effect: His students will remember him with admiration, respect, and gratitude. He prepared his lectures with exceptional care; for his advanced courses, he frequently prepared extensive and detailed notes that he himself photocopied and distributed. He gave his time generously to students, colleagues, and others with whom he freely and graciously shared his ideas and insights. He served the City College of New York system on the University Committee on Research, for which he was the university physics liaison.Beyond the campus, Lax served from the mid-1980s as a member of the National Academy of Sciences’ basic research advisory committee, which evaluated research proposals. He provided scientific services also to the Naval Research Laboratory, Los Alamos National Laboratory, the US Army Research Office, and the Department of Energy.In 1999, the Optical Society of America awarded Lax the Willis Lamb Medal for his work in quantum optics. Lax was an irreplaceable member of the CCNY physics department. An eminent physicist with an international reputation, he was also an exceptionally kind and gentle human being and a caring friend. His colleagues share a profound sense of the loss of a unique scientist and are grateful to have had the opportunity to work with him. Melvin Lax PPT|High resolution© 2003 American Institute of Physics.

Physics Today•May 1, 2003•0 citations

Quantum Electronics

Faustino Wahaia

This Edited Volume is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of Quantum Electronics. The book comprises single chapters authored by various researchers and edited by an expert active in the field. All chapters are complete in itself but united under a common research study topic. This publication aims at providing a thorough overview of the latest research efforts by international authors on Quantum Electronics, and open new possible research paths for further novel developments.

IntechOpen eBooks•Feb 7, 2019•0 citations

The International Superconductive Electronics Conference 2009 (ISEC 09) (Fukuoka, Japan, 16–19 June 2009)

Keiji Enpuku

The 12th International Superconductive Electronics Conference (ISEC 09) was held in June 2009 in Fukuoka, Japan. The conference was very successful, with 253 participants from 17 countries. This special issue is a compendium of selected papers based on the technology presented at that meeting. ISEC has established itself as the leading meeting specializing in superconductor-based electronics and has been organized every two years since 1987. This conference provides an opportunity to present the latest developments in superconductive electronics research, and to interact among the world's experts with maximal interchange between the various topics. The main theme at ISEC 09 was developments in superconductive devices and electronics systems for advanced sensing, medical, communication and information technologies. Technical topics covered at ISEC 09 include: Digital/mixed signal processing RF electronics SQUIDs and their applications Mixers and detectors Thin film materials, junctions and novel devices. Among the 210 presentations, including plenary, oral and poster, only very high quality presentations have been selected for this special issue. Since the success of the conference depends on many invaluable contributions, I must express my appreciation to many individuals and organizations, in no particular order. I would like to thank the Japan Society for the Promotion of Science (JSPS) 146 Committee for co-organization of the conference. I owe a huge debt of gratitude to Akira Fujimaki and the rest of the program committee members for the stimulating conference program. Catherine Foley and Hideo Itozaki both played a prominent part in arranging the special issue as Guest Editors. I would also like to acknowledge the support of JSPS, The Fukuoka Convention and Visitors Bureau, The Murata Science Foundation, Tateisi Science and Technology Foundation, and Kyushu University. Finally, I would like to thank each and every participant at ISEC 09 for making a worthwhile contribution. Your work and your willingness to make this conference a success are indispensable.

Superconductor Science and Technology•Oct 19, 2009•0 citations
The sixty publications selected for this thesis cover a period of forty years, from my time as a PhD student in the Physics Department of the University of Tasmania up to the present in 2002 as founding Professor of Electronic Engineering and Applied Physics and Director of the Centre for Advanced Telecommunications and Quantum Electronics at the University of Canberra. Many of the papers have been co-authored with research students and associates whose valued contributions I have acknowledged below. Unless otherwise stated I have only included accounts of work in which I have played a leading part. I have divided the papers, in some cases somewhat arbitrarily, into two groups which reflect my interests over this period: (a) Aeronomy, Astrophysics and Astronomy, and (b) Fluctuations, Noise and Quantum Electronics. Within these two groups I have attempted a further subdivision in which I have selected and presented papers to illustrate the development of specific concepts and lines of approach, usually in chronological order. This has meant the inclusion of a number of abstracts, short papers and two patent descriptions. (a) AERONOMY, ASTROPHYSICS AND ASTRONOMY The publications in this section cover a period of twenty seven years, starting with my PhD studies at the University of Tasmania in 1960. They include work performed at the University of Adelaide, the University of Texas at Dallas, the University of Otago and finally at the University of Canberra, prior to the commencement of my Work in the field of quantum electronics and quantum optics in 1989. (b) FLUCTUATIONS, NOISE AND QUANTUM ELECTRONICS The papers in this section have a common theme: the analysis of physical systems and processes in which random and chaotic fluctuations play an important part.
This thesis divides very naturally into three chapters, reflecting the three separate areas I have worked in throughout my PhD studies. During my PhD, I published two papers, one relating to the work in the first chapter, and one to that of the second. At the time of submission, the project which the third chapter relates to was still ongoing, with plans for a future publication. The first chapter discusses work done on the real space renormalisation group (RG) for Ising and Potts models in 2 dimensions. Taking inspiration from Hasenbusch's work, a new framework for carrying out the RG is developed, its computational implementation discussed in some detail, as well as the results for a variety of systems and the implications of these results. The numerical scaling of the procedure and the consequences of this for future work are also covered. The results documented in chapter two are purely theoretical and presented in closed form. The research conducted is to do with properties of free interfaces. The second chapter is by and large critical of previous assumptions which have been made about the so-called wave vector dependent, in order to attempt to experimentally measure it and use these measurements to make further predictions. Using some simple toy models, many of these assumptions are shown to be false. In a sense, the goal of the research presented in the chapter two, is not to motivate further research, but to dissuade research in a direction we consider to be misguided, due to the faulty assumptions it is based on. The third chapter covers a small subset of a project concerned with studying correlations within the so-called Abelian Manna Model. The majority of the project involves (computational) Monte Carlo simulations of the dynamics of such systems, but as these results are not ready to present at the time of writing, the chapter is mainly concerned with some analytical results which were derived in order to validate our models for small systems, explain certain quirky phenomena arising from our simulations, and help quantify errors. Finally, there is an appendix which expands upon various topics from the first two chapters.
This volume is a comprehensive compilation of carefully selected questions at the PhD qualifying exam level, including many actual questions from Columbia University, University of Chicago, MIT, State University of New York at Buffalo, Princeton University, University of Wisconsin and the University of California at Berkeley over a twenty-year period. Topics covered in this book include the basic principles of quantum phenomena, particles in potentials, motion in electromagnetic fields, perturbation theory and scattering theory, among many others.
Melvin Lax, a pioneer in the field of quantum optics, died of cancer on 8 December 2002 at his home in Summit, New Jersey.Born in New York City on 8 March 1922, Lax received his BA in physics from New York University in 1942. He then attended MIT, where he earned two degrees in physics: his SM in 1943 and his PhD in 1947. From 1942 to 1945, he carried out research at the MIT Underwater Sound Laboratory under the direction of Philip M. Morse, Richard H. Bolt, and Herman Feshbach.After receiving his PhD, he took the post of assistant professor of physics at Syracuse University, where he advanced to full professor. In 1955, he joined Bell Telephone Laboratories in Murray Hill, New Jersey, where he worked as a member of the technical staff. During 1962–64, he headed the theoretical physics research department there. He left Bell Labs in 1971 to join the faculty at City College of New York as a Distinguished Professor of Physics, but continued as consultant to Bell Labs’ solid-state electronics research laboratory.Lax’s contributions underlie many aspects of present-day design of optical communication devices. In 1963, he developed a quantum regression theorem and a quantum theory of non-commuting noise sources. His results permitted the calculation of laser spectral line shapes, general photocount distributions, and similar observables. He had a deep and lifelong interest in random processes. Before his death, he had been completing a monograph entitled Random Processes (Oxford U. Press, in press) and had been writing a text on modern quantum optics. He applied the separation of signal and noise to different condensed matter systems. That approach led him to analyze how impurities that are randomly placed in a semiconductor medium or that have randomly varying interaction strength affect the energy levels and hence the medium’s conduction properties. The approach also formed the basis for the so-called coherent potential approximation. Late in life, Lax studied the scattering and transmission of laser light through turbid media such as human tissue. He aimed to devise noninvasive optical diagnostic tools for breast cancer without the drawbacks associated with x-ray use.In 1962, Lax developed a technique to obtain symmetry-related selection rules, including time-reversal, that govern the “go/no-go” alternatives for physical processes—for example, scattering or optical transitions—in crystalline solids. In 1971, with Donald Nelson, he considered the structure of the photoelastic tensor response of a crystal—a problem that had been dormant for more than 80 years—and found that a new physical effect, the antisymmetric microscopic rotations of the atomic constituents, had to be included to explain the experiments. Scientists going back to Friedrich Pockels (in 1893), a founder of the study of optical properties of matter under external fields, had assumed that those effects vanished. As was typical of Lax’s approach, the papers Lax and Nelson subsequently produced were detailed and comprehensive, covering the range from microscopic atomistic force models to macroscopic measurable consequences.The interplay between electronic and vibrational degrees of freedom was a theme that, like random processes, bridged Lax’s earliest work with work he did late in his career. Of particular interest was how that interplay determines the absorption and emission of light and the electrical resistivity of material systems. In his early (1952) papers on the Franck-Condon energy in bulk crystals, he meticulously analyzed the subtle electron-phonon effects. Forty years later, with Wei Cai, he invoked those effects to explain how out-of-equilibrium “hot” electrons and “hot” phonons can interact to give negative carrier mobilities in quantum well, or heterostructure, systems. This was a counterintuitive result.Lax served the physics community in many roles. As a member of the American Physical Society’s publications committee from 1980 to 1982, he was instrumental in helping to create a system for electronic submission and processing of manuscripts. He was ahead of his time in recognizing that he should master computers so he could carry out theoretical physics research. He became so expert in computers that one of his early papers on evaluating Fourier integrals was published in Mathematics of Computation in 1982. He also was on the board of editors of the Physical Review, Quantum Optics , and the International Journal of Modern Physics.In the university setting, Lax had a lasting effect: His students will remember him with admiration, respect, and gratitude. He prepared his lectures with exceptional care; for his advanced courses, he frequently prepared extensive and detailed notes that he himself photocopied and distributed. He gave his time generously to students, colleagues, and others with whom he freely and graciously shared his ideas and insights. He served the City College of New York system on the University Committee on Research, for which he was the university physics liaison.Beyond the campus, Lax served from the mid-1980s as a member of the National Academy of Sciences’ basic research advisory committee, which evaluated research proposals. He provided scientific services also to the Naval Research Laboratory, Los Alamos National Laboratory, the US Army Research Office, and the Department of Energy.In 1999, the Optical Society of America awarded Lax the Willis Lamb Medal for his work in quantum optics. Lax was an irreplaceable member of the CCNY physics department. An eminent physicist with an international reputation, he was also an exceptionally kind and gentle human being and a caring friend. His colleagues share a profound sense of the loss of a unique scientist and are grateful to have had the opportunity to work with him. Melvin Lax PPT|High resolution© 2003 American Institute of Physics.
This Edited Volume is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of Quantum Electronics. The book comprises single chapters authored by various researchers and edited by an expert active in the field. All chapters are complete in itself but united under a common research study topic. This publication aims at providing a thorough overview of the latest research efforts by international authors on Quantum Electronics, and open new possible research paths for further novel developments.
The 12th International Superconductive Electronics Conference (ISEC 09) was held in June 2009 in Fukuoka, Japan. The conference was very successful, with 253 participants from 17 countries. This special issue is a compendium of selected papers based on the technology presented at that meeting. ISEC has established itself as the leading meeting specializing in superconductor-based electronics and has been organized every two years since 1987. This conference provides an opportunity to present the latest developments in superconductive electronics research, and to interact among the world's experts with maximal interchange between the various topics. The main theme at ISEC 09 was developments in superconductive devices and electronics systems for advanced sensing, medical, communication and information technologies. Technical topics covered at ISEC 09 include: Digital/mixed signal processing RF electronics SQUIDs and their applications Mixers and detectors Thin film materials, junctions and novel devices. Among the 210 presentations, including plenary, oral and poster, only very high quality presentations have been selected for this special issue. Since the success of the conference depends on many invaluable contributions, I must express my appreciation to many individuals and organizations, in no particular order. I would like to thank the Japan Society for the Promotion of Science (JSPS) 146 Committee for co-organization of the conference. I owe a huge debt of gratitude to Akira Fujimaki and the rest of the program committee members for the stimulating conference program. Catherine Foley and Hideo Itozaki both played a prominent part in arranging the special issue as Guest Editors. I would also like to acknowledge the support of JSPS, The Fukuoka Convention and Visitors Bureau, The Murata Science Foundation, Tateisi Science and Technology Foundation, and Kyushu University. Finally, I would like to thank each and every participant at ISEC 09 for making a worthwhile contribution. Your work and your willingness to make this conference a success are indispensable.