Advanced quantum techniques for future gravitational-wave detectors

Danilishin, S.; Khalili, F. Y.; Miao, H.

doi:10.1007/s41114-019-0018-y

Cited by 56 publications

(41 citation statements)

References 126 publications

(319 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After taking into account frequency dependent squeezing and variational readout as show in Fig. 2, the spectral density of the detector can be calculated as the sum of [21]…”

Section: Design Concept and Quantum Noisementioning

confidence: 99%

A broadband signal recycling scheme for saturating the quantum limit from optical losses

Zhang¹,

Bentley²,

Miao³

2020

Preprint

Self Cite

View full text Add to dashboard Cite

Quantum noise limits the sensitivity of laser interferometric gravitational-wave detectors. Given the state-of-the-art optics, the optical losses define the lower bound of best possible quantum-limited detector sensitivity. In this work, we come up with the configuration which allows to saturate this lower bound by converting the signal recycling cavity to be a broadband signal amplifier using an active optomechanical filter. We will show the difference and advantage of such a broadband signal recycling scheme compared with the previous white-light-cavity scheme using the optomechanical filter in [Phys.Rev.Lett.115.211104 (2015)]. The drawback is that the new scheme is more susceptible to the thermal noise of the mechanical oscillator. To suppress the radiation pressure noise which rises along with the signal amplification, squeezing with input/output filter cavities and heavier test mass are used in this work.

show abstract

“…After taking into account frequency dependent squeezing and variational readout as show in Fig. 2, the spectral density of the detector can be calculated as the sum of [21]…”

Section: Design Concept and Quantum Noisementioning

confidence: 99%

A broadband signal recycling scheme for saturating the quantum limit from optical losses

Zhang¹,

Bentley²,

Miao³

2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition to showing the need for small γ S , this condition prompts us to employ a small Ω S → 0, contrary to what was suggested by the first condition [Eq. (6)]. These two opposing requirements can, in principle, be accommodated by a compromise involving a small, finite Ω S as in the original proposal [23], where the value 2π × 3 Hz was used.…”

Section: A Matching Conditions For the Interferometer And Spin Systementioning

confidence: 99%

Gravitational wave detection beyond the standard quantum limit using a negative-mass spin system and virtual rigidity

2019

Self Cite

View full text Add to dashboard Cite

Gravitational wave detectors (GWDs), which have brought about a new era in astronomy, have reached such a level of maturity that further improvement necessitates quantum-noise-evading techniques. Numerous proposals to this end have been discussed in the literature, e.g., invoking frequency-dependent squeezing or replacing the current Michelson interferometer topology by that of the quantum speedmeter. Recently, a proposal based on the linking of a standard interferometer to a negative-mass spin system via entangled light has offered an unintrusive and small-scale new approach to quantum noise evasion in GWDs [Phys. Rev. Lett. 121, 031101 (2018)]. The solution proposed therein does not require modifications to the highly refined core optics of the present GWD design and, when compared to previous proposals, is less prone to losses and imperfections of the interferometer. In the present article, we refine this scheme to an extent that the requirements on the auxiliary spin system are feasible with state-of-the-art implementations. This is accomplished by matching the effective (rather than intrinsic) susceptibilities of the interferometer and spin system using the virtual rigidity concept, which, in terms of implementation, requires only suitable choices of the various homodyne, probe, and squeezing phases.

show abstract

“…Making use of the variables defined in Eqs. (12) and (13), and the asymptotic expansions in Eqs. (A11) and (A12), we obtain…”

Section: Appendix A: Asymptotic Expansion Of Polymer Energy Eigenfuncmentioning

confidence: 99%

“…This will affect various physical observables, and the question which naturally arises is whether such signatures of Planck scale effects can be measured in very-high sensitive current and future experiments such as gravitational wave detectors. In the next decade, several advanced ground-based gravitational-wave detectors will be operational with baseline up to 10 Km [13,14]. Specifically, the Einstein Telescope is to be built underground to reduce the seismic noise, and the Cosmic Explorer is to use cryogenic systems to help cut down the noise experienced from the heat on its electronics.…”

Section: Introductionmentioning

confidence: 99%

Polymer quantization and advanced gravitational wave detector

Stargen¹,

Shankaranarayanan

Das

2019

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the observable consequences of Planck scale effects in the advanced gravitational wave detector by polymer quantizing the optical field in the arms of the interferometer. For large values of polymer energy scale, compared to the frequency of photon field in the interferometer arms, we consider the optical field to be a collection of infinite decoupled harmonic oscillators, and construct a new set of approximated polymer-modified creation and annihilation operators to quantize the optical field. Employing these approximated polymer-modified operators, we obtain the fluctuations in the radiation pressure on the end mirrors and the number of output photons. We compare our results with the standard quantization scheme and corrections from the Generalized Uncertainty Principle.

show abstract

Advanced quantum techniques for future gravitational-wave detectors

Cited by 56 publications

References 126 publications

A broadband signal recycling scheme for saturating the quantum limit from optical losses

A broadband signal recycling scheme for saturating the quantum limit from optical losses

Gravitational wave detection beyond the standard quantum limit using a negative-mass spin system and virtual rigidity

Polymer quantization and advanced gravitational wave detector

Contact Info

Product

Resources

About