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Path Integrals

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Path integrals are a formulation of quantum mechanics that generalizes the classical action principle. They represent the sum over all possible paths a particle can take between two points, weighted by the exponential of the action, allowing for the calculation of quantum amplitudes and probabilities.
lightbulbAbout this topic
Path integrals are a formulation of quantum mechanics that generalizes the classical action principle. They represent the sum over all possible paths a particle can take between two points, weighted by the exponential of the action, allowing for the calculation of quantum amplitudes and probabilities.

Key research themes

1. How do path integrals formulate quantum mechanics and what are their applications in different physical contexts?

This research theme explores the foundational formulation of quantum mechanics via path integrals, tracing its mathematical structure, historical evolution, and applications across diverse physical systems from quantum optics to quantum field theory. It emphasizes path integrals as both conceptual tools linking quantum and classical regimes and as practical computational frameworks for tackling problems involving bosonic systems, coherent states, and photonics.

Key finding: This paper provides a comprehensive tutorial and historical review of the path integral formulation, highlighting its universality and foundational role in theoretical physics. It demonstrates how path integrals... Read more
Key finding: This work tackles the longstanding challenge of defining time-continuous path integrals in the coherent states basis without inconsistency, advancing a regularization scheme that enables direct continuum calculations. It... Read more
Key finding: This paper delivers a practical and pedagogical framework for numerically evaluating path integrals on a lattice, focusing on quantum harmonic oscillators to illustrate key computational procedures. It emphasizes the handling... Read more
Key finding: Introducing the use of symplectic action integrals as phase functions, this theoretical investigation connects phase space path integrals with Fourier integral operators, clarifying how the Maslov index and Morse index emerge... Read more

2. How can path integral techniques be applied to complex quantum systems, such as time-dependent harmonic oscillators and quantum field computations involving Feynman integrals?

This theme investigates the extension and application of path integral methods to tackle problems in quantum dynamics with time-dependent parameters and the algebraic and analytical structures of multi-loop Feynman integrals arising in quantum field theory. It covers canonical transformations, delta-functional integration, and algebraic geometry approaches, aiming at exact or algorithmic evaluations of propagators and integral reductions in highly nontrivial systems.

Key finding: This paper develops a phase-space path integral approach combined with canonical transformations and delta-functional integration to derive exact propagators for a class of time-dependent harmonic oscillators with arbitrary... Read more
Key finding: The study proposes a novel, efficient algorithm to compute Macaulay matrices that generate systems of linear relations for Feynman integrals within the framework of GKZ hypergeometric systems and twisted cohomology. By... Read more
Key finding: This paper presents the reduction of Feynman integrals to master integrals via computing Gröbner bases in a rational double-shift algebra representing IBP relations as left ideals. It introduces first-order normal-form IBP... Read more

3. How can path integral formalism be extended and applied to financial mathematics, especially for pricing interest rate derivatives?

This research area investigates the adaptation of path integral techniques from physics to financial modeling, particularly in the context of stochastic processes governing interest rates. It proposes path integrals as an alternative to classical PDE-based pricing methods, enabling direct computation of option prices under short rate models with advantages for analytical tractability and numerical implementation, reflecting interdisciplinary methodological transfers.

Key finding: This paper introduces a stochastic approach using path integrals to price interest rate derivatives without relying on traditional PDEs or explicit stochastic process solutions. Applied to the Vasicek short rate model, the... Read more

All papers in Path Integrals

Lattice quantum chromodynamics (LQCD) is a discrete gauge theory in which the matter field is defined on nodes and the gauge field (connection) on edges. We establish an exact mathematical isomorphism between this structure and... more
Working micro models can demonstrate the integration of 3D printing, microelectronics , and distributed processing, to provide off-planet methods of on-site assembly....potentially minimising the importage of expensive components shipped... more
We introduce and discuss Monte Carlo methods in quantum field theories. Methods of independent Monte Carlo, such as random sampling and importance sampling, and methods of dependent Monte Carlo, such as Metropolis sampling and Hamiltonian... more
The Principle of Least Action, the arrow of time, and the emergence of smooth physics from discrete rules are treated as separate results requiring separate explanations. This paper argues they are three instances of one structural fact:... more
This paper derives the principle of stationary action from the Primitive Bifurcation Law of the Void Dynamics Model (VDM), showing that the familiar variational rule is not an independent postulate but the temporal-path effective... more
In this work we prove the existence of (at least) one solution of the inequality: where a and l are non linear forms, whose coef�cients satisfy Carathéodorys conditions and suitable growths assumptions, � + and � • are parts of ∂�. The... more
The classical brachistochrone problem is mapped to a geodesic trajectory on a Riemannian manifold defined by the conformal Jacobi metric ds² = (1/2gy)(dx² + dy²). The Gaussian curvature K = -g/y diverges at the physical origin y → 0. The... more
The COS-QD module defines the dynamical layer of the COS program by describing discrete time evolution on the shell-filament state space in operator-theoretic and channel-theoretic terms. It separates local updates, physical projectors,... more
In the paper, the inverse multi-parametric problem is investigated in the following form: for the given sequence of eigen values {(λ 1,n , λ 2,n , ..., λ m,n)} n=1,2,... ⊂ R m with real coordinates and the sequences of appropriate given... more
La teoria della misura astratta, sviluppatasi nel corso del ventesimo secolo principalmente grazie ai contributi fondamentali di Henri Lebesgue, Johann Radon, Otton Nikodym e altri matematici di straordinaria levatura, rappresenta uno dei... more
In queste note cercherò di discutere nel modo più omogeneo possibile alcuni aspetti dell'analisi matematica che per varie ragioni restano esclusi dai corsi tradizionali e che tuttavia credo che siano spesso di grande utilità sia nella... more
) implique l'accord avec les conditions générales d'utilisation (). Toute utilisation commerciale ou impression systématique est constitutive d'une infraction pénale. Toute copie ou impression de ce fichier doit contenir la présente... more
The factorization method of Infeld and Hull is applied to the radial Schrödinger equation for d-dimensional isotropic harmonic oscillator and various new ladder operators are defined. The radial energy eigenstates are expressed in terms... more
This work presents a consistent formulation of a theoretical framework in which time, at the quantum scale, is represented by a dynamical scalar field τ (x). We provide a General Relativity (GR)-compatible action, field equations,... more
This paper elevates the "Influence by Reference" protocol from a local dynamical equation to a global variational principle. We postulate that the interaction between the Quantum Substrate (Q) and the Classical Substrate (C) in the Hybrid... more
La teoria della misura è uno dei pilastri fondamentali dell'analisi matematica moderna. Nata dalle esigenze di fornire una...
RCD 4.0 establishes a strictly mathematical framework in which continuous spacetime geometry emerges from discrete causal networks through torsional and stochastic operators. The formulation eliminates circular dependencies in mass... more
La teoria delle probabilità rappresenta uno dei pilastri fondamentali della matematica moderna, eppure le sue origini sono...
-À minha família, em especial aos meus pais, Augusto e Maguilânia, e meu irmão, Marco Túlio, pelo apoio, amizade e compreensão. -À Deus pela oportunidade de viver, ser físico e pela ajuda 1 . -À minha orientadora, Maria Carolina, e meu... more
Clifford geometric algebras of multivectors are treated in detail. These algebras are built over a graded space and exhibit a grading or multivector structure. The careful study of the endomorphisms of this space makes it clear that... more
In this short note, we develop trigonometric selector kernels to represent odd zeta values via dual hyperbolic counterparts. This framework highlights a Fourier-Poisson duality, incorporating finite-part integrals in the sense of... more
We introduce the Threshold of Recursive Awareness (TRA), the critical point at which prime-weighted recursion generates stable physical constants, a quantized temporal lattice, and coherent information flow sufficient to support... more
Analizamos las posibilidades de introducir las ideas básicas de la mecánica cuántica en la escuela secundaria, adaptando los conceptos de la formulación de integrales de camino (path integrals) para los estudiantes. Este trabajo focaliza... more
The main object of this paper is to set up two (conceivably) valuable double integrals including the multiplication of Bessel function with Jacobi and Laguerre polynomials, which are given in terms of Srivastava and Daoust functions. By... more
## Theoretical Principles **Zero-Point Energy and Vacuum Fluctuations:** Every quantum field has an irreducible ground-state energy known as zero-point energy (ZPE). Even in a perfect vacuum at absolute zero, fields exhibit random... more
This paper presents an analytical treatment of economic systems with an arbitrary number of agents that keeps track of the systems' interactions and agent's complexity. The formalism does not seek to aggregate agents: it rather replaces... more
This paper presents an analytical treatment of economic systems with an arbitrary number of agents that keeps track of the systems' interactions and agents' complexity. This formalism does not seek to aggregate agents. It rather replaces... more
Tunneling of two particles in synchronous and asynchronous regimes is studied in the framework of dissipative quantum tunneling. The critical temperature Tc corresponding to a bifurcation of the underbarrier trajectory is determined. The... more
Tunneling of two particles in synchronous and asynchronous regimes is studied in the framework of dissipative quantum tunneling. The critical temperature Tc corresponding to a bifurcation of the underbarrier trajectory is determined. The... more
We study the low temperature behaviour of path integrals for a simple one-dimensional model. Starting from the Feynman-Kac formula, we derive a new functional representation of the density matrix at finite temperature, in terms of the... more
Many random processes can be simulated as the output of a deterministic model accepting random inputs. Such a model usually describes a complex mathematical or physical stochastic system and the randomness is introduced in the input... more
Motivated by the notion of perceptual error, as a core concept of the perceptual control theory, we propose an action-amplitude model for controlled entropic self-organization (CESO). We present several aspects of this development that... more
The multiple reciprocity method is based on using higher‐order fundamental solutions to eliminate domain integrals encountered in transient boundary integral formulations. The paper considers the numerical stability of this approach... more
Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std. Z39.18 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data... more
Introduction A torus – informally a “donut” shape – can undergo a dramatic topological transformation under specific constraints, collapsing into a fundamentally lower-dimensional structure. In this work we present a rigorous geometric... more
In the paper, the inverse multi-parametric problem is investigated in the following form: for the given sequence of eigen values {(λ 1,n , λ 2,n , ..., λ m,n)} n=1,2,... ⊂ R m with real coordinates and the sequences of appropriate given... more
This paper reinterprets the Recursive Harmonic Framework (RHF) through the lens of Omniological Resonance Theory (ORT), presenting a new ontological architecture for the emergence of reality based on unidirectional flow. Introducing the... more
This paper presents a comprehensive mathematical framework, termed Recursive Harmonic Fields (RHF), detailing how multidimensional symbolic spaces compress into observable physical structure and emergent phenomena. At its core lies the... more
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