### Abstract

the long time propagation, the Markov approximation is employed that neglects the effects of initial conditions of these waves. In this case, despite intuitively expected decoherence and dissipation from the noisy spacetime, we show that such phenomena turn out to be completely suppressed for scalar bosons, photons, and gravitons, which are coupled to gravity but otherwise free. The short time effects are then recovered through the transient non-Markovian evolution. Focusing on scalar bosons in initially incoherent states, we find that the resulting quantum dissipation depend strongly on the distribution of the particle momentum states. We further identify a hitherto undiscovered collective anti-dissipation mechanism for a large number of particles. The surprising new effect tends to “bundle” identical particles within a sharply distributed momentum states having a width inversely proportional to the particle number due to the thermal fluctuations, or its square root due to the vacuum fluctuations of spacetime.

Original language | English |
---|---|

Article number | 061501R |

Pages (from-to) | 1-7 |

Number of pages | 7 |

Journal | Physical Review D |

Volume | 94 |

Issue number | 6 |

DOIs | |

Publication status | Published - 19 Sep 2016 |

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### Cite this

*Physical Review D*,

*94*(6), 1-7. [061501R]. https://doi.org/10.1103/PhysRevD.94.061501

**Spacetime foam induced collective bundling of intense fields.** / Oniga, Teodora; Wang, Charles H.-T.

Research output: Contribution to journal › Article

*Physical Review D*, vol. 94, no. 6, 061501R, pp. 1-7. https://doi.org/10.1103/PhysRevD.94.061501

}

TY - JOUR

T1 - Spacetime foam induced collective bundling of intense fields

AU - Oniga, Teodora

AU - Wang, Charles H.-T.

N1 - This research is supported by the Carnegie Trust for the Universities of Scotland (TO) and by the EPSRC GG-Top Project and the Cruickshank Trust (CW).

PY - 2016/9/19

Y1 - 2016/9/19

N2 - The influence of spacetime foam on a broad class of bosonic fields with arbitrary numbers of particles in the low energy regime is investigated. Based on recently formulated general description of open quantum gravitational systems, we analyse the propagation of scalar, electromagnetic, and gravitational waves on both long and short time scales with respect to their mean frequencies. Forthe long time propagation, the Markov approximation is employed that neglects the effects of initial conditions of these waves. In this case, despite intuitively expected decoherence and dissipation from the noisy spacetime, we show that such phenomena turn out to be completely suppressed for scalar bosons, photons, and gravitons, which are coupled to gravity but otherwise free. The short time effects are then recovered through the transient non-Markovian evolution. Focusing on scalar bosons in initially incoherent states, we find that the resulting quantum dissipation depend strongly on the distribution of the particle momentum states. We further identify a hitherto undiscovered collective anti-dissipation mechanism for a large number of particles. The surprising new effect tends to “bundle” identical particles within a sharply distributed momentum states having a width inversely proportional to the particle number due to the thermal fluctuations, or its square root due to the vacuum fluctuations of spacetime.

AB - The influence of spacetime foam on a broad class of bosonic fields with arbitrary numbers of particles in the low energy regime is investigated. Based on recently formulated general description of open quantum gravitational systems, we analyse the propagation of scalar, electromagnetic, and gravitational waves on both long and short time scales with respect to their mean frequencies. Forthe long time propagation, the Markov approximation is employed that neglects the effects of initial conditions of these waves. In this case, despite intuitively expected decoherence and dissipation from the noisy spacetime, we show that such phenomena turn out to be completely suppressed for scalar bosons, photons, and gravitons, which are coupled to gravity but otherwise free. The short time effects are then recovered through the transient non-Markovian evolution. Focusing on scalar bosons in initially incoherent states, we find that the resulting quantum dissipation depend strongly on the distribution of the particle momentum states. We further identify a hitherto undiscovered collective anti-dissipation mechanism for a large number of particles. The surprising new effect tends to “bundle” identical particles within a sharply distributed momentum states having a width inversely proportional to the particle number due to the thermal fluctuations, or its square root due to the vacuum fluctuations of spacetime.

U2 - 10.1103/PhysRevD.94.061501

DO - 10.1103/PhysRevD.94.061501

M3 - Article

VL - 94

SP - 1

EP - 7

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 6

M1 - 061501R

ER -