scholarly journals Kaku: Quantum Field Theory/Heide: Basic Ideas and Concepts in Nuclear Physics An Introductory Approach/Schwarz: Topology for Physicists/Müller: Grundzüge der Thermodynamik/Tonomura: Electron Holography/Rieke: Detection of Light: From the Ultraviolet to th

1995 ◽  
Vol 51 (9) ◽  
pp. 867-872
Author(s):  
H. Lichte ◽  
K. Lüders ◽  
S. L. Wolff ◽  
E. Keppler
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Nuclear Physics ◽  
Electron Holography ◽  
Quantum Field ◽  
Basic Ideas

Momentum space techniques for curved space–time quantum field theory

1979 ◽  
Vol 367 (1728) ◽  
pp. 123-141 ◽  
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Momentum Space ◽  
Nuclear Physics ◽  
Space Time ◽  
Coordinate Space ◽  
Quantum Field ◽  
Curved Space ◽  
Time Quantum ◽  
Space Formulation

A momentum space formulation of curved space–time quantum field theory is presented. Such a formulation allows the riches of momentum space calculational techniques already existing in nuclear physics to be exploited in the application of quantum field theory to cosmology and astrophysics. It is demonstrated that one such technique can allow exact, or very accu­rate approximate, results to be obtained in cases which are intractable in coordinate space. An efficient method of numerical solution is also described.

scholarly journals Hadron physics from lattice QCD

2016 ◽  
Vol 25 (07) ◽  
pp. 1642008 ◽  
Author(s):  
Wolfgang Bietenholz
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Perturbation Theory ◽  
Quantum Field ◽  
Chiral Perturbation ◽  
Hadron Physics ◽  
Lattice Regularization ◽  
Sign Problem ◽  
Hadron Masses ◽  
Basic Ideas

We sketch the basic ideas of the lattice regularization in Quantum Field Theory, the corresponding Monte Carlo simulations, and applications to Quantum Chromodynamics (QCD). This approach enables the numerical measurement of observables at the non-perturbative level. We comment on selected results, with a focus on hadron masses and the link to Chiral Perturbation Theory. At last, we address two outstanding issues: topological freezing and the sign problem.

scholarly journals RAPID TUNNELING AND PERCOLATION IN THE LANDSCAPE

2009 ◽  
Vol 24 (04) ◽  
pp. 741-788 ◽  
Author(s):  
SASWAT SARANGI ◽  
GARY SHIU ◽  
BENJAMIN SHLAER
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Percolation Theory ◽  
Functional Approach ◽  
Quantum Field ◽  
False Vacuum ◽  
Vacuum Decay ◽  
Decay Channels ◽  
Resonance Tunneling ◽  
Basic Ideas

Motivated by the possibility of a string landscape, we re-examine tunneling of a scalar field across single/multiple barriers. Recent investigations have suggested modifications to the usual picture of false vacuum decay that leads to efficient and rapid tunneling in the landscape when certain conditions are met. This can be due to stringy effects (e.g. tunneling via the DBI action), or effects arising from the presence of multiple vacua (e.g. resonance tunneling). In this paper we discuss both DBI tunneling and resonance tunneling. We provide a QFT treatment of resonance tunneling using the Schrödinger functional approach. We also show how DBI tunneling for supercritical barriers can naturally lead to conditions suitable for resonance tunneling. We argue, using basic ideas from percolation theory, that tunneling can be rapid in a landscape where a typical vacuum has multiple decay channels, and discuss various cosmological implications. This rapidity vacuum decay can happen even if there are no resonance/DBI tunneling enhancements, solely due to the presence of a large number of decay channels. Finally, we consider various ways of circumventing a recent no-go theorem for resonance tunneling in quantum field theory.

scholarly journals On the Foundations of Statistical Nuclear Physics

2020 ◽  
Vol 1 ◽  
pp. 179
Author(s):  
C. Syros
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Nuclear Physics ◽  
Canonical Ensemble ◽  
Quantum Field ◽  
Definition Of

The density matric for the nucleus, the canonical ensemble in second quantized mechanical definition of the temperature have from Quantum Field Theory. The evolution conservative or dissipalive form and is ergodic.

Troubling Time/s and Ecologies of Nothingness: Re-turning, Re-membering, and Facing the Incalculable

2018 ◽  
Author(s):  
Karen Barad
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Nuclear Physics ◽  
Quantum Field ◽  
Ethical Implications ◽  
Nature And Culture ◽  
Subatomic Particles ◽  
To Come ◽  
Work Of Mourning ◽  
Nuclear Warfare

This chapter examines the epistemological-ontological-ethical implications of temporal dis/junction by reading insights from Quantum Field Theory and Kyoko Hayashi’s account of the destruction wrought by the Nagasaki bombing through one another. The diffraction of time at the core of quantum field theory troubles the scalar distinction between the world of subatomic particles and that of colonialism, war, nuclear physics research, and environmental destruction; all of which entangle the effects of nuclear warfare throughout the present time, troubling the binaries between micro and macro, nature and culture, nonhuman and human. The chapter thus attempts to think through what possibilities remain open for an embodied re-membering of the past which, against the colonialist practices of erasure and avoidance and the related desire to set time aright, calls for thinking a certain undoing of time; a work of mourning more accountable to, and doing justice to, the victims of ecological destruction and of racist, colonialist, and nationalist violence, human and otherwise—those victims who are no longer there, and those yet to come.

Field theory, quantum

2018 ◽  
Author(s):  
Paul Teller
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Quantum Mechanics ◽  
Finite Number ◽  
Quantum Correlations ◽  
Quantum Field ◽  
Indefinite Number ◽  
Basic Ideas ◽  
Conceptual Difficulties ◽  
Number Of Particles

Quantum field theory extends the basic ideas of quantum mechanics for a fixed, finite number of particles to systems comprising fields and an unlimited, indefinite number of particles, providing a coherent blend of field-like and particle-like concepts. One can start from either field- or particle-like concepts, apply the methods of quantum mechanics, and arrive at the same theory. The result inherits all the puzzles of conventional quantum mechanics, such as measurement, superposition and quantum correlations; and it adds a new roster of conceptual difficulties. To mention three: the vacuum seems not really to be empty; the particle concept clashes with classical intuitions; and a method called ‘renormalization’ gets the best predictions in physics, apparently by dropping infinite terms.

scholarly journals Light-Front Field Theory on Current Quantum Computers

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 597
Author(s):  
Michael Kreshchuk ◽  
Shaoyang Jia ◽  
William Kirby ◽  
Gary Goldstein ◽  
James Vary ◽  
...  
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Nuclear Physics ◽  
Bound States ◽  
Quantum Computer ◽  
Relativistic Quantum ◽  
Quantum Algorithm ◽  
Light Front ◽  
Quantum Field Theories ◽  
Quantum Field

We present a quantum algorithm for simulation of the quantum field theory in light-front formulation and demonstrate how existing quantum devices can be used to study the structure of bound states in relativistic nuclear physics. Specifically, we apply the Variational Quantum Eigensolver algorithm to find the ground state of the light-front Hamiltonian obtained within the Basis Light-Front Quantization (BLFQ) framework. The BLFQ formulation of the quantum field theory allows one to readily import techniques developed for digital quantum simulation of quantum chemistry. This provides a method that can be scaled up to the simulation of full, relativistic quantum field theories in the quantum advantage regime. As an illustration, we calculate the mass, mass radius, decay constant, electromagnetic form factor, and charge radius of the pion on the IBM Vigo chip. This is the first time that the light-front approach to the quantum field theory has been used to enable simulation of a real physical system on a quantum computer.

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