Metabolism of dinosaurs as determined from their growth

Lee, Scott A.

doi:10.1103/physreve.92.032706

Cited by 16 publications

(17 citation statements)

References 103 publications

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“…Examining the z-evolution of |ψ 1 | 2 and |ψ 2 | 2 in Figure 4 (a) will again reveal the appearance of oscillations due to the simultaneous presence of k 1 and k 2 . These appear similar to the oscillations seen in [21], known as Rabi oscillations, where gain and loss, rather than the coupling, are driven. It should be noted that in unlike those seen in [21], the oscillations of |ψ 1 | 2 and |ψ 2 | 2 are not perfectly out of phase, and also appear to show some deformation, suggesting they are being influenced by iγ b (z), as seen in Figure 1 (b).…”

Section: Figsupporting

confidence: 65%

Complex Berry phase dynamics in PT -symmetric coupled waveguides

Hayward

Biancalana

2018

Phys. Rev. A

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We show that the analogue of the geometric phase for non-Hermitian coupled waveguides with PT -symmetry and at least one periodically varying parameter can be purely imaginary, and will consequently result in the manifestation of an instability in the system. The instability peaks seen in the spectrum of the system's eigenstates after evolution along the waveguides can be directly mapped to the spectrum of the derivative of the geometric function. The instabilities are magnified as the exceptional point of the system is approached, and non-adiabatic effects begin to appear. As the system cannot evolve adiabatically in the vicinity of the exceptional point, PT -symmetry will be observed breaking earlier than theoretically predicted.

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Section: Figsupporting

confidence: 65%

Complex Berry phase dynamics in PT -symmetric coupled waveguides

Hayward

Biancalana

2018

Phys. Rev. A

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“…Using classical means, processes such as superluminal motion [7] or the formation of an event horizon in a white hole [8] can be simulated. The use of quantum simulators has recently brought results in physical processes of difficult or dubious observation, such as the simulation of a traversable wormhole [9], space-times in which superluminal trips are allowed and even CTCs [10], Hawking radiation [11], magnetic monopoles [12] or tachyonic particles [13]. The nature of each problem makes it necessary to use different types of systems to perform the simulations.…”

Section: Introductionmentioning

confidence: 99%

Closed timelike curves and chronology protection in quantum and classical simulators

Martín-Vázquez¹,

Sabín²

2020

Class. Quantum Grav.

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In principe, General Relativity seems to allow the existence of closed timelike curves (CTC). However, when quantum effects are considered, it is likely that their existence is prevented by some kind of chronological protection mechanism, as Hawking conjectured. Confirming or refuting the conjecture would require a full quantum theory of gravity. Meanwhile, the use of simulations could shed some light on this issue. We propose simulations of CTCs in a quantum system as well as in a classical one. In the quantum simulation, some restrictions appear that are not present in the classical setup, which could be interpreted as an analogue of a chronology protection mechanism.

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“…In the case where the SUSY scale is extremely large, evaluating the radiative corrections through fixedorder perturbative calculations is seriously questionable and using Effective Field Theory (EFT) methods seems a more appropriate approach; for a recent discussion see Ref. [12]. Indeed, in case of a large mass hierarchy between the SUSY and electroweak scales, EFT techniques resum the large logarithmic contributions and enable to keep under control the perturbative expansions.…”

Section: Introductionmentioning

confidence: 99%

The neutral Higgs self-couplings in the (h)MSSM

2018

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We consider the Minimal Supersymmetric extension of the Standard Model in the regime where the supersymmetric breaking scale is extermely large. In this MSSM, not only the Higgs masses will be affected by large radiative corrections, the dominant part of which is provided by the third generation quark/squark sector, but also the various self-couplings among the Higgs states. In this note, assuming that squarks are extremely heavy, we evaluate the next-to-leading order radiative corrections to the two neutral CPeven Higgs self-couplings λ Hhh and λ hhh and to the partial decay width Γ(H → hh) that are most relevant at the LHC. The calculation is performed using an effective field theory approach that resums the large logarithmic squark contributions and allows to keep under control the perturbative expansion. Since the direct loop vertex corrections are generally missing in this effective approach, we have properly renormalised the effective theory to take them into account. Finally, we perform a comparison of the results in this effective MSSM with those obtained in a much simpler way in the so-called hMSSM approach in which the mass value for the lightest Higgs boson M h = 125 GeV is used as an input. We show that the hMSSM provides a reasonably good approximation of the corrected self-couplings and H → hh decay rate and, hence, it can be used also in these cases. *

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Metabolism of dinosaurs as determined from their growth

Cited by 16 publications

References 103 publications

Complex Berry phase dynamics in PT -symmetric coupled waveguides

Complex Berry phase dynamics in PT -symmetric coupled waveguides

Closed timelike curves and chronology protection in quantum and classical simulators

The neutral Higgs self-couplings in the (h)MSSM

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