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It is widely accepted that consciousness or, in other words, mental activity is in some way correlated to the behavior of the brain or, in other words, material brain activity. Since **quantum** **theory** ... effects since
**gravitation** is the only fundamental interaction which is not integrated into **quantum** **theory**
so far. Rather than modifying elements of the **theory** of **gravitation** (i.e., general
**relativity**) to

We construct an effective four-dimensional model by compactifying a ten-dimensional **theory** of gravity coupled with a real scalar dilaton field on a time-dependent torus. The corresponding action in ... formal question involves how to handle the **classical** Hamiltonian constraint, , in the **quantum** **theory**. Also, connected with the problem of time is the “Hilbert space problem” [5, 6] referring to the not-at

We construct a general stratified scalar **theory** of **gravitation** from a field equation that accounts for the self-interaction of the field and a particle Lagrangian, and calculate its post-Newtonian ... .
Special **relativity** also implied that any proposed **theory** of
**gravitation** should be relativistic. The simplest way is to put
Newtonian’s **gravitation** in a relativistic form. Scalar
gravitational theories were

Abstract We introduce superdensity operators as a tool for analyzing **quantum** information in spacetime. Superdensity operators encode spacetime correlation functions in an operator framework, and ... operator tensor formulation of **quantum** **theory**, Phil. Trans. Roy. Soc. A 370 (2012) 3385 [arXiv:1201.4390] [INSPIRE].ADSMathSciNetCrossRefGoogle Scholar
[32]
L. Hardy, Operational general **relativity**

elaborated for **quantum** mechanics to **relativity** **theory** and in such a way that time and space become creations instead of discoveries and an underlying non temporal and non spatial reality comes into existence ... of **relativity** **theory** that makes the existence of a flow of time compatible with the four-dimensional block universe. To this end, we apply the creation-discovery view elaborated for **quantum** mechanics

Visser’s ones. We indeed argue that these two theories are not equivalent. In fact, Rastall **theory** of gravity is an “open” **theory** when compared to Einstein general **theory** of **relativity**. Thus, it is ready to ... [
8,9
]. A key point
is that all of the potential alternatives to Einstein’s general
**theory** of **relativity** (GTR) must be viable. This implies that
alternative theories must be in agreement with the

effect on vacuum decay. After studying the existence and properties of vortices, we study their decay rate through **quantum** tunneling using a variety of techniques. In particular, for so-called thin-wall ... -breaking φ4 potential), vortices are built out of
the true vacuum and are stable both classically and **quantum** mechanically. (Their **classical**
stability is easy to see: the potential and scalar field gradient

geodesic. The time dilation and Lorentz contraction are discussed pointing out some notable features of the de Sitter **relativity** in static charts. ... physical meaning in
**quantum** **theory** [3–6] or for describing the **classical**
relative geodesic motion [7–9]. With their help we constructed
recently the dS **relativity** [10] in comoving charts [11] and
the AdS

causal. This makes the spin 2 case very special, and suggests that multiple species of spin 2 is forbidden, leading us to general **relativity** as essentially the unique internally consistent effective **theory** ... 2 case very special, and suggests that multiple species of spin 2 is forbidden, leading us to general **relativity** as essentially the unique internally consistent e ective **theory** of spin 2.
**Classical**

Change and local spatial variation are missing in Hamiltonian general **relativity** according to the most common definition of observables as having 0 Poisson bracket with all first-class constraints ... .: **Classical** and **quantum** field theories in the Lagrangian formalism . Phys. Rev . 89 , 4 - 16 ( 1953 )
10. Boulware , D.G. , Deser , S. : Can **gravitation** have a finite range? Phys. Rev. D 6 , 3368 - 3382 ( 1972

Abstract Entanglement entropies calculated in the framework of **quantum** field **theory** on **classical**, flat or curved, spacetimes are known to show an intriguing area law in four dimensions, but they are ... . Weinberg, Ultraviolet Divergences In **Quantum** Theories Of **Gravitation**, in General **Relativity**, an Einstein Centenary Survey, S.W. Hawking and W. Israel eds., Cambridge University Press (1980), pg. 790 [INSPIRE

Generalised spin structures describe spinor fields that are coupled to both general **relativity** and gauge **theory**. We classify those generalised spin structures for which the corresponding fields admit ... are coupled to general **relativity** (GR) as well as gauge **theory**.
In the absence of gauge fields, space–time transformations of spinors
coupled to GR can be understood by considering pairs (g, ψ) of a

A major outstanding problem for many **quantum** clock synchronization protocols is the hidden assumption of a common phase reference between the parties to be synchronized. In general, the definition of ... considerably better than existing **classical** Einstein synchronization based schemes. Here we only examined the same basic protocol as given in ref.16, which has errors scaling as the standard **quantum** limit

**classical** systems are realized using either mechanical, electrical, or optical resonators. In addition to the fundamental interest of such dynamical phenomena linking **classical** and **quantum** physics, we believe ... physics, we believe that these are attractive for the **classical** analogue simulation of **quantum** systems.
Introduction
**Classical**-**quantum** analogies
**Classical** oscillators are ubiquitous in nature. With

The traditional **quantum** secret sharing does not succeed in the presence of rational participants. A rational participant’s motivation is to maximize his utility, and will try to get the secret alone ... of **quantum**. In QSS, the secret is split, distributed and reconstructed by **quantum** operations. QSS provides more perfect security based on the **quantum** **theory** such as uncertainty principle and no-cloning

We discuss the problems of **quantum** **theory** (QT) complicating its merging with general **relativity** (GR). QT is treated as a general **theory** of micro-phenomena—a bunch of models. **Quantum** mechanics (QM ... collaborations with W. Mayer, as part of his program for the unified
field **theory**, but, again, conceived as a **classical**-like field **theory**, modeled on general
**relativity**, and in opposition to **quantum** mechanics and

inhomogeneity, with space-times of vanishing size being required to be almost homogeneous. We initiate a study of this exotic **quantum** field **theory** at the interacting level, and discuss what the full **theory** of ... and M.J.G. Veltman, One loop divergencies in the **theory** of **gravitation**, Ann. Inst. H. Poincare Phys. Theor. A20 (1974) 69 [INSPIRE].
[2]
M.H. Goroff and A. Sagnotti, **Quantum** gravity at two loops, Phys

We define a multilayer optimization method for the **quantum** Internet. Multilayer optimization integrates separate procedures for the optimization of the **quantum** layer and the **classical** layer of the ... source and target **quantum** nodes. The objective of the optimization of the **classical** layer is the cost minimization of any auxiliary **classical** communications. The multilayer optimization framework provides

Motivated by recent studies of holographic complexity, we examine the question of circuit complexity in **quantum** field **theory**. We provide a **quantum** circuit model for the preparation of Gaussian states ... **theory** for general dimensions. Applying the geometric approach of Nielsen to this **quantum** circuit model, the complexity of the state becomes the length of the shortest geodesic in the space of circuits. We

einsteinschen theorie. Sitzungs-berichte der Deutschen Akademie der Wissenschaften zu Berlin
3. Halliday , David., & Resnick , Robert. ( 1985 ) Basic Concepts In **Relativity** And Early **Quantum** **Theory** . John Wiley ... teaching path from
**classical** Newtonian gravitational force to a minimum first order accuracy of
General **Relativity**. The method can be used much in the same manner as a
simple transformation is used in