Piero Chiarelli | Consiglio Nazionale delle Ricerche (CNR) (original) (raw)
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Papers by Piero Chiarelli
arXiv (Cornell University), Nov 7, 2017
Proceedings of SPIE, Mar 12, 2003
A dielectric elastomer planar actuator consists of a polymeric film included between two complian... more A dielectric elastomer planar actuator consists of a polymeric film included between two compliant electrodes. A voltage difference applied between the electrodes generates an electrostatic pressure which compresses the flim thickness and expands its surface. The high performances and low costs of dielectric elastometers, belonging to the class of electroactive polymers, suggest their advantageous use for the actuation of small scale devices. The following figures present some possible simple applications of such actuators.
Open Journal of Biophysics, 2014
European journal of applied physic, Sep 10, 2021
Zenodo (CERN European Organization for Nuclear Research), Jul 21, 2023
arXiv (Cornell University), Mar 18, 2014
International journal of sciences, 2016
Biomedicine & Pharmacotherapy, 1998
Symmetry, Dec 17, 2023
By utilizing a generalized version of the Madelung quantum hydrodynamic framework that incorporat... more By utilizing a generalized version of the Madelung quantum hydrodynamic framework that incorporates noise, we derive a solution using the path integral method to investigate how a quantum superposition of states evolves over time. This exploration seeks to comprehend the process through which a stable quantum state emerges when fluctuations induced by the noisy gravitational background are present. The model defines the conditions that give rise to a limited range of interactions for the quantum potential, allowing for the existence of coarse-grained classical descriptions at a macroscopic level. The theory uncovers the smallest attainable level of uncertainty in an open quantum system and examines its consistency with the localized behavior observed in large-scale classical systems. The research delves into connections and similarities alongside other theories such as decoherence and the Copenhagen foundation of quantum mechanics. Additionally, it assesses the potential consequences of wave function decay on the measurement of photon entanglement. To validate the proposed theory, an experiment involving entangled photons transmitted between detectors on the moon and Mars is discussed. Finally, the findings of the theory are applied to the creation of larger Q-bit systems at room temperatures.
In this work, the author employs the quantum hydrodynamic formalism to achieve the geometrization... more In this work, the author employs the quantum hydrodynamic formalism to achieve the geometrization of spacetime for describing the gravitational interaction within the framework of quantum theory. This approach allows for the development of an equation of gravity that is mathematically connected to the fermion and boson fields. This achievement is accomplished by incorporating two fundamental principles: covariance of the quantum field equations and the principle of least action. By considering these principles, a theory is established that enables the calculation of gravitational corrections to Quantum Electrodynamics, and potentially, to the standard model of particle physics as well. The theory also provides an explanation for two phenomena: the existence of a cosmological pressure density similar to quintessence, that is compatible with the small value of the observed cosmological constant, and the breaking of matter-antimatter symmetry at high energies offering insights into why...
arXiv (Cornell University), Apr 27, 2015
Proceedings of SPIE, Apr 26, 1996
Several porous material systems (e.g.. hydrogels, conducting polymers, electrorheologic fluids) m... more Several porous material systems (e.g.. hydrogels, conducting polymers, electrorheologic fluids) make possible a control of their properties in response to an appropriate stimulus (and viceversa) and therefore. they belong to the class of intelligent materials. In the present paper we propose a first classification of intelligent porous systems dividing them in three main classes: porous material as semi-permeable media, as reservoir and delivery systems and as biphasic composites with large interfacial area between solid and fluid phases. Then we present a continuos model to describe the passive mechanical behaviour of a generic porous conducting polymer saturated by a fluid. The model is solved for a stress-relaxation test and it is verified in the specific case of a doped polypyrrole porous matrix saturated by an electrolytic solution. The goodness of fit between experimental date and theoretical data confirms the validity of the model.
Polymer Gels and Networks, 1996
Abstract In this work a poro-elastic approach that describes the mechanical readjustment of charg... more Abstract In this work a poro-elastic approach that describes the mechanical readjustment of charged poly electrolyte gels, has been extended to π-conjugated conducting polymers. In particular the problem of stress relaxation is considered. During such a process the dissipation is generated both by the readjustment of the viscoelastic polymer matrix and by the motion of the fluid through the polymer network. The contribution of the latter process is evaluated. The result shows that the characteristic time of force decay is proportional to the square of the physical dimension of specimen. The kinetics of volume dilatation of a thin strip of material is also derived when it is let to freely adsorb a fluid from an external bath. Finally, there are proposed two polyelectrolyte gel-conducting polymer composite systems that can lead to efficient electro-mechanical energy conversion.
arXiv (Cornell University), Nov 7, 2017
The work shows that the evolution of quantum states in the hydrodynamic representation can be obt... more The work shows that the evolution of quantum states in the hydrodynamic representation can be obtained by Lagrangean motion equations that can be derived by a minimum action principle. Once the quantum hydrodynamic motion equations have been generalized in the non-Euclidean space-time by using the physics covariance postulate, the quantum gravity equation, determining the geometry of the space-time necessary to give full meaning to them, is obtained by minimizing the overall action comprehending the gravitational field. The theoretical output for a scalar uncharged field shows the spontaneous emergence of a cosmological energy impulse tensor density (CEITD) that in the classical limit converges to a constant. The mean value of CEITD in the galactic space leads to the correct order of magnitude of the cosmological constant. The coupling of the quantum gravitational equation with half-spin fermions is finally developed.
arXiv (Cornell University), Nov 7, 2017
The work shows that the evolution of quantum states in the hydrodynamic representation can be obt... more The work shows that the evolution of quantum states in the hydrodynamic representation can be obtained by Lagrangean motion equations that can be derived by a minimum action principle. The quantum behavior introduces an extra-action term that is the direct consequence of the quantization condition. The Lagrangean density in the non-Euclidean space-time has been obtained by using the physics covariance postulate. The description in curved space is obtained by minimizing the overall action comprehending the variation due to the metric tensor. The energy impulse tensor density for a scalar uncharged particle as well as of a fermion have been derived.
American Journal of Applied Psychology, Jan 17, 2017
Biomedicine & Pharmacotherapy, 1996
arXiv (Cornell University), Nov 7, 2017
Proceedings of SPIE, Mar 12, 2003
A dielectric elastomer planar actuator consists of a polymeric film included between two complian... more A dielectric elastomer planar actuator consists of a polymeric film included between two compliant electrodes. A voltage difference applied between the electrodes generates an electrostatic pressure which compresses the flim thickness and expands its surface. The high performances and low costs of dielectric elastometers, belonging to the class of electroactive polymers, suggest their advantageous use for the actuation of small scale devices. The following figures present some possible simple applications of such actuators.
Open Journal of Biophysics, 2014
European journal of applied physic, Sep 10, 2021
Zenodo (CERN European Organization for Nuclear Research), Jul 21, 2023
arXiv (Cornell University), Mar 18, 2014
International journal of sciences, 2016
Biomedicine & Pharmacotherapy, 1998
Symmetry, Dec 17, 2023
By utilizing a generalized version of the Madelung quantum hydrodynamic framework that incorporat... more By utilizing a generalized version of the Madelung quantum hydrodynamic framework that incorporates noise, we derive a solution using the path integral method to investigate how a quantum superposition of states evolves over time. This exploration seeks to comprehend the process through which a stable quantum state emerges when fluctuations induced by the noisy gravitational background are present. The model defines the conditions that give rise to a limited range of interactions for the quantum potential, allowing for the existence of coarse-grained classical descriptions at a macroscopic level. The theory uncovers the smallest attainable level of uncertainty in an open quantum system and examines its consistency with the localized behavior observed in large-scale classical systems. The research delves into connections and similarities alongside other theories such as decoherence and the Copenhagen foundation of quantum mechanics. Additionally, it assesses the potential consequences of wave function decay on the measurement of photon entanglement. To validate the proposed theory, an experiment involving entangled photons transmitted between detectors on the moon and Mars is discussed. Finally, the findings of the theory are applied to the creation of larger Q-bit systems at room temperatures.
In this work, the author employs the quantum hydrodynamic formalism to achieve the geometrization... more In this work, the author employs the quantum hydrodynamic formalism to achieve the geometrization of spacetime for describing the gravitational interaction within the framework of quantum theory. This approach allows for the development of an equation of gravity that is mathematically connected to the fermion and boson fields. This achievement is accomplished by incorporating two fundamental principles: covariance of the quantum field equations and the principle of least action. By considering these principles, a theory is established that enables the calculation of gravitational corrections to Quantum Electrodynamics, and potentially, to the standard model of particle physics as well. The theory also provides an explanation for two phenomena: the existence of a cosmological pressure density similar to quintessence, that is compatible with the small value of the observed cosmological constant, and the breaking of matter-antimatter symmetry at high energies offering insights into why...
arXiv (Cornell University), Apr 27, 2015
Proceedings of SPIE, Apr 26, 1996
Several porous material systems (e.g.. hydrogels, conducting polymers, electrorheologic fluids) m... more Several porous material systems (e.g.. hydrogels, conducting polymers, electrorheologic fluids) make possible a control of their properties in response to an appropriate stimulus (and viceversa) and therefore. they belong to the class of intelligent materials. In the present paper we propose a first classification of intelligent porous systems dividing them in three main classes: porous material as semi-permeable media, as reservoir and delivery systems and as biphasic composites with large interfacial area between solid and fluid phases. Then we present a continuos model to describe the passive mechanical behaviour of a generic porous conducting polymer saturated by a fluid. The model is solved for a stress-relaxation test and it is verified in the specific case of a doped polypyrrole porous matrix saturated by an electrolytic solution. The goodness of fit between experimental date and theoretical data confirms the validity of the model.
Polymer Gels and Networks, 1996
Abstract In this work a poro-elastic approach that describes the mechanical readjustment of charg... more Abstract In this work a poro-elastic approach that describes the mechanical readjustment of charged poly electrolyte gels, has been extended to π-conjugated conducting polymers. In particular the problem of stress relaxation is considered. During such a process the dissipation is generated both by the readjustment of the viscoelastic polymer matrix and by the motion of the fluid through the polymer network. The contribution of the latter process is evaluated. The result shows that the characteristic time of force decay is proportional to the square of the physical dimension of specimen. The kinetics of volume dilatation of a thin strip of material is also derived when it is let to freely adsorb a fluid from an external bath. Finally, there are proposed two polyelectrolyte gel-conducting polymer composite systems that can lead to efficient electro-mechanical energy conversion.
arXiv (Cornell University), Nov 7, 2017
The work shows that the evolution of quantum states in the hydrodynamic representation can be obt... more The work shows that the evolution of quantum states in the hydrodynamic representation can be obtained by Lagrangean motion equations that can be derived by a minimum action principle. Once the quantum hydrodynamic motion equations have been generalized in the non-Euclidean space-time by using the physics covariance postulate, the quantum gravity equation, determining the geometry of the space-time necessary to give full meaning to them, is obtained by minimizing the overall action comprehending the gravitational field. The theoretical output for a scalar uncharged field shows the spontaneous emergence of a cosmological energy impulse tensor density (CEITD) that in the classical limit converges to a constant. The mean value of CEITD in the galactic space leads to the correct order of magnitude of the cosmological constant. The coupling of the quantum gravitational equation with half-spin fermions is finally developed.
arXiv (Cornell University), Nov 7, 2017
The work shows that the evolution of quantum states in the hydrodynamic representation can be obt... more The work shows that the evolution of quantum states in the hydrodynamic representation can be obtained by Lagrangean motion equations that can be derived by a minimum action principle. The quantum behavior introduces an extra-action term that is the direct consequence of the quantization condition. The Lagrangean density in the non-Euclidean space-time has been obtained by using the physics covariance postulate. The description in curved space is obtained by minimizing the overall action comprehending the variation due to the metric tensor. The energy impulse tensor density for a scalar uncharged particle as well as of a fermion have been derived.
American Journal of Applied Psychology, Jan 17, 2017
Biomedicine & Pharmacotherapy, 1996
Quantum Geometrization of Spacetime in General Relativity, 2023
The primary aim of this study is to establish a unified criterion for obtaining the gravity devel... more The primary aim of this study is to establish a unified criterion for obtaining the gravity
developed by quantum mass densities within spacetime. This is achieved by extending
the principle of equivalence between inertial and gravitational mass, a fundamental aspect
of General Relativity, to the covariance of equations of motion. In the classical scenario,
we obtain the gravity of spacetime with classical characteristics, whereas in the quantum
scenario, we obtain the gravity of spacetime with quantum mechanical properties. In both
cases, the principle of least action is employed to define the geometry of spacetime.
The gravity resulting from the quantum geometrization of spacetime can be seen as the
quantum mechanical counterpart of General Relativity, where the fields of quantum
physics are integrated into the theory of gravitation. In this study, we derive the gravity
generated by boson and fermion fields. The outcomes of the theory have been utilized to
derive antimatter gravity, resolve black hole singularities, and understand the origin of
small-valued cosmological constants. The work also derives the fluctuations of the black
hole quantum potential in the presence of the gravitational wave background and
evaluates the resultant repulsive gravity at large distances. Furthermore, it examines the
breaking of the matter-antimatter symmetry caused by the gravitational coupling of the
fermions field. The significance of matter-antimatter asymmetry in pre-big bang black
hole is described: This behavior implies that the matter-antimatter asymmetry might have
played a crucial role in the highly energetic vacuum states of the pre-big bang black hole.
When surpassing the Planck mass, the high-energy fermion state in the pre-big bang
black hole's comprised fermion and antifermion black holes. The annihilation of these
black holes emitted lighter fermions, accounting for the mass difference between the
black hole and anti-black hole. The theory shows that as we approach the Minkowskian
limit, the matter-antimatter symmetry becomes asymptotically established, and the mass
disparity between particles and antiparticles diminishes as we transition from heavier to
lighter particles within each particle family. The theory also shows that if
antimatter symmetry were upheld, the vacuum would have collapsed into the polymer
branched phase because there would have been no residual mass (resulting from the
matter-antimatter difference) to stabilize the vacuum and confer a nonzero cosmological
constant. Thus, the matter-antimatter symmetry in a quantum mechanical covariant
gravity is incongruent with the formation of a physically stable vacuum with non-zero
mean cosmological constant value.
The process of quantum geometrization of spacetime provides a comprehensive
framework for understanding the evolution of our universe, from the Pre-big bang black
hole to the current quantum-decoherent classical reality.
The theory posits that the ubiquitous presence of supermassive black holes (SMBHs) at
the centers of galaxies is a direct consequence of the big-bang, from which SMBHs are
generated without mass accretion, and that it plays a pivotal role in cosmological
expansion, driven by their repulsive interactions.
Finally, the system of field equations for Quantum Electrodynamics (QED) in curved
spacetime (containing the fields back-reaction), along with an introductory section on the
Standard Model in self-generated gravity is presented. The problem of second
quantization of fields in spacetime with the coupled gravity of is also introduced. This
has the potential to extend the standard Quantum Field Theory (QFT) to high energies.
Experimental tests examining the disparities in magnetic moments between leptons and
antileptons, as well as investigations involving entangled photons, are proposed as
potential avenues for empirically validating the theory.