Parity Violation Constraints Using Cosmic Microwave Background Polarization Spectra from 2006 and 2007 Observations by the QUaD Polarimeter

Wu, Emily; Ade, Peter A. R.; Bock, J. J.; Bowden, M.; Brown, Michael L.; Cahill, G.; Castro, Paulo Francisco de; Church, S.; Culverhouse, T.; Friedman, Robert; Ganga, K.; Gear, Walter Kieran; Gupta, S.; Hinderks, J.; Kovac, J. M.; Lange, A. E.; Leitch, E. M.; Melhuish, S. J.; Memari, Y.; Murphy, John A.; Orlando, A.; Piccirillo, L.; Pryke, C.; Rajguru, N.; Rusholme, B.; Schwarz, R.; O'Sullivan, Créidhe M.; Taylor, A. N.; Thompson, K. L.; Turner, A. H.; Zemcov, Michael

doi:10.1103/physrevlett.102.161302

Cited by 111 publications

(82 citation statements)

References 16 publications

(18 reference statements)

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“…We have used our measurements of the TB and EB power spectra to put constraints on possible parity-violating interactions on cosmological scales. Following our previous analysis (Wu et al 2009), we constrain the rotation angle due to such a possible "cosmological birefringence" to be 0.…”

Section: Discussionmentioning

confidence: 99%

“…However, in Section 7.7, we will use these spectra to constrain possible parity-violating interactions to the surface of last scattering (see e.g., Lue et al 1999) following our previous work (Wu et al 2009). …”

Section: Methodsmentioning

confidence: 99%

“…The analysis is model independent in the sense that we construct our estimator for Δα in terms of the observed power spectra and do not assume a cosmological model for the EE or TE signals. For details of our estimator and analysis (which has not changed since our previous work), we refer the reader to Wu et al (2009).…”

Section: Constraints On Parity Violationmentioning

confidence: 99%

“…• 50 (Wu et al 2009), where the two quoted uncertainties are the random and systematic components, respectively. 25 Here, we repeat this analysis with our new measurements.…”

Section: Constraints On Parity Violationmentioning

confidence: 99%

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IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD

Brown

Ade

Bock

et al. 2009

ApJ

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241

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We present an improved analysis of the final data set from the QUaD experiment. Using an improved technique to remove ground contamination, we double the effective sky area and hence increase the precision of our cosmic microwave background (CMB) power spectrum measurements by ∼30% versus that previously reported. In addition, we have improved our modeling of the instrument beams and have reduced our absolute calibration uncertainty from 5% to 3.5% in temperature. The robustness of our results is confirmed through extensive jackknife tests, and by way of the agreement that we find between our two fully independent analysis pipelines. For the standard six-parameter ΛCDM model, the addition of QUaD data marginally improves the constraints on a number of cosmological parameters over those obtained from the WMAP experiment alone. The impact of QUaD data is significantly greater for a model extended to include either a running in the scalar spectral index, or a possible tensor component, or both. Adding both the QUaD data and the results from the Arcminute Cosmology Bolometer Array Receiver experiment, the uncertainty in the spectral index running is reduced by ∼25% compared to WMAP alone, while the upper limit on the tensor-to-scalar ratio is reduced from r < 0.48 to r < 0.33 (95% c.l.). This is the strongest limit on tensors to date from the CMB alone. We also use our polarization measurements to place constraints on parity-violating interactions to the surface of last scattering, constraining the energy scale of Lorentz violating interactions to < 1.5×10 −43 GeV (68% c.l.). Finally, we place a robust upper limit on the strength of the lensing B-mode signal. Assuming a single flat band power between = 200 and = 2000, we constrain the amplitude of B-modes to be < 0.57 μK 2 (95% c.l.).

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Constraints On Parity Violationmentioning

confidence: 99%

“…• 50 (Wu et al 2009), where the two quoted uncertainties are the random and systematic components, respectively. 25 Here, we repeat this analysis with our new measurements.…”

Section: Constraints On Parity Violationmentioning

confidence: 99%

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IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD

Brown

Ade

Bock

et al. 2009

ApJ

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241

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“…Instead, we treat this modulation as dynamical control of the boundary system which is coupled to a fermionic bath that is treated as a source of noise. The goal of our modulation is to realize an optimal spectral filter [46][47][48][49][50][51][52][53][54] that blocks transfer via those channel eigenmodes that are responsible for noiseinduced leakage of the QI [55]. We show that under optimal modulation, the fidelity and the speed of transfer can be improved by several orders of magnitude, and the fastest possible transfer is achievable (for a given fidelity).…”

mentioning

confidence: 98%

Optimized dynamical control of state transfer through noisy spin chains

Zwick¹,

Álvarez²,

Bensky³

et al. 2014

New J. Phys.

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We propose a method of optimally controlling the tradeoff of speed and fidelity of state transfer through a noisy quantum channel (spin-chain). This process is treated as qubit state-transfer through a fermionic bath. We show that dynamical modulation of the boundary-qubits levels can ensure state transfer with the best tradeoff of speed and fidelity. This is achievable by dynamically optimizing the transmission spectrum of the channel. The resulting optimal control is robust against both static and fluctuating noise in the channelʼs spin-spin couplings. It may also facilitate transfer in the presence of diagonal disorder (on site energy noise) in the channel.Keywords: quantum state transfer, quantum control, spin dynamics, decoherence One dimensional (1D) chains of spin-1 2 systems with nearest-neighbor couplings, nicknamed spin chains, constitute a paradigmatic quantum many-body system of the Ising type [1]. As such, spin chains are well suited for studying the transition from quantum to classical transport and from mobility to localization of excitations as a function of disorder and temperature [2]. In the context of quantum information (QI), spin chains are envisioned to form reliable quantum channels for QI transmission between nodes (or blocks) [3,4]. Contenders for the realization of high-fidelity QI transmission are spin chains comprised of superconducting qubits [5,6], cold atoms [7-10], nuclear spins in liquid-or solid-state NMR [11][12][13][14][15][16][17][18], quantum dots [19], ion traps [20,21] and nitrogen-vacancy centers in diamond [22][23][24][25].

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Can we explain cosmic birefringence without a new light field beyond Standard Model?

Nakai,

Namba,

Obata

et al. 2024

J. High Energ. Phys.

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The recent analysis of the Planck 2018 polarization data shows a nonzero isotropic cosmic birefringence (ICB) that is not explained within the ΛCDM paradigm. We then explore the question of whether the nonzero ICB is interpreted by the framework of the Standard Model Effective Field Theory (SMEFT), or at the energy scales of the cosmic microwave background, the low-energy EFT (LEFT) whose dynamical degrees of freedom are five SM quarks and all neutral and charged leptons. Our systematic study reveals that any operator in the EFT on a cosmological background would not give the reported ICB angle, which is observationally consistent with frequency independence. In particular, we estimate the size of the ICB angle generated by the effect that the cosmic microwave background photons travel through the medium of the cosmic neutrino background with parity-violating neutrino-photon interactions and find that it would be too small to explain the data. If the reported ICB angle should be confirmed, then our result would indicate the existence of a new particle that is lighter than the electroweak scale and feebly interacting with the SM particles.

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Parity Violation Constraints Using Cosmic Microwave Background Polarization Spectra from 2006 and 2007 Observations by the QUaD Polarimeter

Cited by 111 publications

References 16 publications

IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD

IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD

Optimized dynamical control of state transfer through noisy spin chains

Can we explain cosmic birefringence without a new light field beyond Standard Model?

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