Vertex operators for axionic wormholes

Grinstein, Benjamı́n; Maharana, Jnanadeva

doi:10.1016/0550-3213(90)90226-4

Cited by 12 publications

(8 citation statements)

References 18 publications

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“…We note that the idea of applying wormhole physics to solve the cosmological constant problem has appeared earlier in the work of Coleman [17] and has been discussed by many others [18][19][20][21]. However, the essence of our proposal is very different from Coleman's which predicts an exactly vanishing cosmological constant.…”

Section: Introductionmentioning

confidence: 80%

“…Notice that the presence of the factor 'cosη' in (21) implies that the torsional instantons are capable of producing both a small and a large vacuum energy density, depending upon the value of the η-angle. However, here we would like to focus only on a scenario consistent with current observations, which favours the presence of a tiny amount of vacuum energy that is thought to be driving the accelerated expansion of the universe today.…”

Section: Solution Of the Cosmological Constant Problemmentioning

confidence: 99%

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Dark energy from the gravity vacuum

Sengupta¹

2015

Class. Quantum Grav.

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We propose a new solution to the cosmological constant problem building on a nonperturbative quantum theory of gravity with torsional instantons. These pseudoparticles, which were recently found to exist in a first order formulation of Giddings-Strominger axionic gravity, carry nontrivial Nieh-Yan topological charge. The nonperturbative ground state as generated due to tunneling effects is shown to be stable under quantum fluctuations. Within this framework, the associated vacuum angle, namely the Barbero-Immirzi topological parameter, gets fixed to a numerical value determined by the Hubble constant. * sandipan@iucaa.ernet.in

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Section: Introductionmentioning

confidence: 80%

Section: Solution Of the Cosmological Constant Problemmentioning

confidence: 99%

Dark energy from the gravity vacuum

Sengupta¹

2015

Class. Quantum Grav.

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“…It will interesting to explore worldline path integrals on near term quantum computers. The quantum simulation of particles in background gauge fields also has applications to Kaluza-Klein theory and quantum gravity [33] [34] [35] [36] [37] [38] which will also be interesting to examine through quantum computing.…”

Section: Discussionmentioning

confidence: 99%

Worldline Path Integrals for Gauge Fields and Quantum Computing

Feng,

McGuigan

2021

Preprint

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We study different aspects the worldline path integrals with gauge fields using quantum computing. We use the Variational Quantum Eigensolver (VQE) and Evolution of Hamiltonian (EOH) quantum algorithms and IBM QISKit to perform our computations. We apply these methods to the path integral of a particle moving in a Abelian and non-Abelian background gauge field associated with a constant magnetic field and the field of a chromo-magnetic field. In all cases we found excellent agreement with the classical computation. We also discuss the insertion of vertex operators into the worldline path integrals to study scattering and show how to represent them using unitary operators and quantum gates on near term quantum computers.

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“…We present below an alternative method of extracting vertex operators [8]. Here expectation value of field operators in wormhole background is approximated by their saddle point values in semiclasical limit(h = 0),…”

Section: Vertex Operatormentioning

confidence: 99%

Magnetic wormholes and vertex operators

Singh

1994

Phys. Rev. D

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We consider wormhole solutions in 2 + 1 Euclidean dimensions. A duality transformation is introduced to derive a new action from the magnetic wormhole action of Gupta, Hughes, Preskill, and Wise. The classical solution is presented. The vertex operators corresponding to the wormhole are derived. Conformally coupled scalars and spinors are considered in the wormhole background and the vertex operators are computed.PACS number(s): 04.40.Nr, 11.1O.Kk

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Vertex operators for axionic wormholes

Cited by 12 publications

References 18 publications

Dark energy from the gravity vacuum

Dark energy from the gravity vacuum

Worldline Path Integrals for Gauge Fields and Quantum Computing

Magnetic wormholes and vertex operators

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