# S-Matrix and Anomaly of de Sitter

@article{Dvali2021SMatrixAA, title={S-Matrix and Anomaly of de Sitter}, author={Gia Dvali}, journal={Symmetry}, year={2021}, volume={13}, pages={3} }

S-matrix formulation of gravity excludes de Sitter vacua. In particular, this is organic to string theory. The S-matrix constraint is enforced by an anomalous quantum break-time proportional to the inverse values of gravitational and/or string couplings. Due to this, de Sitter can satisfy the conditions for a valid vacuum only at the expense of trivializing the graviton and closed-string S-matrices. At non-zero gravitational and string couplings, de Sitter is deformed by corpuscular 1/N effects…

## 18 Citations

### de Sitter space as a BRST invariant coherent state of gravitons

- PhysicsPhysical Review D
- 2022

The S-matrix formulation indicates that a consistent embedding of de Sitter state in quantum gravity is possible exclusively as an excited quantum state constructed on top of a valid S-matrix vacuum…

### On $S$-Matrix Exclusion of de Sitter and Naturalness

- Physics
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The cosmological constant puzzle, traditionally viewed as a naturalness problem, is evidently nullified by the S-matrix formulation of quantum gravity/string theory. We point out an implication of…

### de Sitter Space as a Glauber‐Sudarshan State: II

- PhysicsFortschritte der Physik
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We provide further evidence to support the fact that a four‐dimensional effective field theory description with de Sitter isometries in IIB string theory, overcoming the no‐go and the swampland…

### Quantum Gravity in Species Regime

- Physics
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A large number of particle species allows to formulate quantum gravity in a special double-scaling limit, the species limit. In this regime, quantum gravitational amplitudes simplify substantially.…

### A gravitino distance conjecture

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- 2021

We conjecture that in N = 1 supersymmetric 4d string vacua with non-vanishing gravitino mass, the limit m3/2 → 0 is at infinite distance. In particular one can write Mtower ' m3/2 so that as the…

### Tachyonic de Sitter Solutions of 10d Type II Supergravities

- PhysicsFortschritte der Physik
- 2021

Cosmological models of the early or late universe exhibit (quasi) de Sitter space‐times with different stability properties. Considering models derived from string theory, the swampland program does…

### Is asymptotically safe inflation eternal?

- Physics
- 2021

Recently, based on swampland considerations in string theory, the (no) eternal inflation principle has been put forward. The natural question arises whether similar conditions hold in other…

### Gauge hierarchy from electroweak vacuum metastability

- PhysicsPhysical Review D
- 2022

We consider the possibility that the gauge hierarchy is a byproduct of the metastability of the electroweak vacuum, i.e., that whatever mechanism is responsible for the latter also sets the running…

### Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation

- PhysicsClassical and Quantum Gravity
- 2021

We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified (R+ R
2) supergravity. Our models…

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