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In this work we apply Dirac's Constraint Analysis (DCA) to solve Superconducting Quantum Circuits (SQC). The Lagrangian of a SQC reveals the constraints, that are classified in a Hamiltonian framework, such that redundant variables can be…

Quantum Physics · Physics 2024-10-28 Akshat Pandey , Subir Ghosh

We present a detailed analysis of the Hamiltonian constraints of the d-dimensional tetrad-connection gravity where the non-dynamical part of the spatial connection is fixed to zero by an adequate guage transformation. This new action…

General Relativity and Quantum Cosmology · Physics 2017-05-26 Meriem Hadjer Lagraa , Mohammed Lagraa , Nabila Touhami

We analyze the canonical treatment of classical constrained mechanical systems formulated with a discrete time. We prove that under very general conditions, it is possible to introduce nonsingular canonical transformations that preserve the…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Cayetano Di Bartolo , Rodolfo Gambini , Rafael Porto , Jorge Pullin

In a classical Hamiltonian theory with second class constraints the phase space functions on the constraint surface are observables. We give general formulas for extended observables, which are expressions representing the observables in…

High Energy Physics - Theory · Physics 2009-11-07 Simon Lyakhovich , Robert Marnelius

It is shown that the free Dirac equation in spherically symmetric static backgrounds of any dimensions can be put in a simple form using a special version of Cartesian gauge in Cartesian coordinates. This is manifestly covariant under the…

General Relativity and Quantum Cosmology · Physics 2010-11-19 Ion I Cotaescu

We rederive the results of our companion paper, for matching spacetime and internal signature, by applying in detail the Dirac algorithm to the Palatini action. While the constraint set of the Palatini action contains second class…

General Relativity and Quantum Cosmology · Physics 2013-02-13 Norbert Bodendorfer , Thomas Thiemann , Andreas Thurn

A fundamental problem regarding the Dirac quantization of a free particle on an $N-1$ curved hypersurface embedded in $N$($\geq 2$) flat space is the impossibility to give the same form of the curvature-induced quantum potential, the…

High Energy Physics - Theory · Physics 2018-07-04 D. K. Lian , L. D. Hu , Q. H. Liu

From the point of view of canonical quantum gravity, it has become imperative to find a framework for quantization which provides a {\em general} prescription to find the physical inner product, and is flexible enough to accommodate…

General Relativity and Quantum Cosmology · Physics 2016-08-31 Ranjeet S. Tate

An elementary presentation of the methods for the canonical quantization of constraint systems with Fermi variables is given. The emphasis is on the subtleties of the construction of an appropriate classical bracket that could be…

Mathematical Physics · Physics 2010-11-15 Marcin Kaźmierczak

In this work, we have obtained the solutions of the (1 + 1) dimensional Dirac equation on a gravitational background within the generalized uncertainty principle. We have shown that how minimal length parameters effect the Dirac particle in…

High Energy Physics - Theory · Physics 2019-04-18 Ozlem Yesiltas

In this paper we explore the idea of looking at the Dirac quantisation conditions as $\hbar$-dependent constraints on the tangent bundle to phase-space. Starting from the path-integral version of classical mechanics and using the natural…

dg-ga · Mathematics 2016-08-31 Ennio Gozzi

The Spinning Particle Model for anyon is analysed in the Batalin-Tyutin scheme of quantisation in extended phase space. Here additional degrees of freedom are introduced in the phase space such that all the constraints in the theory are…

High Energy Physics - Theory · Physics 2015-06-25 Subir Ghosh

In this work we have shown precisely that the curvature of a 2-sphere introduces quantum features in the system through the introduction of the noncommutative (NC) parameter that appeared naturally via equations of motion. To obtain this…

High Energy Physics - Theory · Physics 2014-07-24 B. F. Rizzuti , E. M. C. Abreu , A. C. R. Mendes , M. A. Freitas , V. Nikoofard

We study the isospectrality problem for a relativistic free quantum particle, described by the Dirac Hamiltonian, confined in a one-dimensional ring with a junction. We analyze all the self-adjoint extensions of the Hamiltonian in terms of…

Quantum Physics · Physics 2023-11-30 Giuliano Angelone

We show that the reality conditions to be imposed on Ashtekar variables to recover real gravity can be implemented as second class constraints a la Dirac. Thus, counting gravitational degrees of freedom follows accordingly. Some constraints…

General Relativity and Quantum Cosmology · Physics 2009-10-28 Hugo A. Morales-Tecotl , Luis F. Urrutia , J. David Vergara

A modification of the canonical quantization procedure for systems with time-dependent second-class constraints is discussed and applied to the quantization of the relativistic particle in a plane wave. The time dependence of constraints…

High Energy Physics - Theory · Physics 2010-04-06 S. P. Gavrilov , D. M. Gitman

The quantum deformation of the Poisson bracket is the Moyal bracket. We construct quantum deformation of the Dirac bracket for systems which admit global symplectic basis for constraint functions. Equivalently, it can be considered as an…

High Energy Physics - Theory · Physics 2009-11-11 M. I. Krivoruchenko , A. A. Raduta , Amand Faessler

We develop here a simple formalism that converts the second-class constraints into first-class ones for a particle moving on the $n$-dimensional sphere. The Poisson algebra generated by the Hamiltonian and the constraints closes and by…

High Energy Physics - Theory · Physics 2007-05-23 Petre Diţă

Dirac particles have been notoriously difficult to confine. Implementing a curved space Dirac equation solver based on the quantum Lattice Boltzmann method, we show that curvature in a 2-D space can confine a portion of a charged, mass-less…

Mesoscale and Nanoscale Physics · Physics 2018-11-02 Kyriakos Flouris , Miller Mendoza Jimenez , Jens-Daniel Debus , Hans J. Herrmann

In this work, we investigate a Lagrangian model describing a particle constrained to move along non-degenerate conic sections, parameterized by the orbital eccentricity \( e \). In the non-relativistic regime, we apply the Dirac--Bergmann…

General Relativity and Quantum Cosmology · Physics 2025-08-01 Alejandro G. Andarcia-Caballero , Jaime Manuel-Cabrera , Luis G. Romero-Hernández , Jorge M. Paulin-Fuentes