Quantum Spin Dynamics in a Normal Bose Gas with Spin-Orbit Coupling

Tang, Wai Ho; Zhang, Shizhong

doi:10.1103/physrevlett.121.120403

Cited by 7 publications

(5 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within the first few weeks after our results became public, a dedicated experiment was performed at the Los Alamos UCN facility looking for the monochromatic photon in the neutron dark decay n → χ γ [34]. The search was sensitive to final state photons with energies 0.782 MeV < E γ < 1.664 MeV and challenged the case Br(n → χ γ) ≈ 1% at a significance level of 2.2 σ.…”

Section: Neutron → Dark Matter + Photonmentioning

confidence: 99%

Dark side of the neutron?

Fornal

Grinstein

2019

EPJ Web Conf.

View full text Add to dashboard Cite

We discuss our recently proposed interpretation of the discrepancy between the bottle and beam neutron lifetime experiments as a sign of a dark sector. The difference between the outcomes of the two types of measurements is explained by the existence of a neutron dark decay channel with a branching fraction 1%. Phenomenologically consistent particle physics models for the neutron dark decay can be constructed and they involve a strongly self-interacting dark sector. We elaborate on the theoretical developments around this idea and describe the efforts undertaken to verify it experimentally.

show abstract

Section: Neutron → Dark Matter + Photonmentioning

confidence: 99%

Dark side of the neutron?

Fornal

Grinstein

2019

EPJ Web Conf.

View full text Add to dashboard Cite

show abstract

“…It was recently pointed out that the tension between both classes of measurements, as well as the the reactor neutrino flux deficiency[204], could be explained by a dark decay channel for the neutron[21]. The simplest version of the model seems to be however incompatible with various laboratory and astrophysical observations[205][206][207][208][209].…”

mentioning

confidence: 99%

New physics searches in nuclear and neutron β decay

González–Alonso

Naviliat‐Cuncic

Severijns

2019

Progress in Particle and Nuclear Physics

241

282

View full text Add to dashboard Cite

The status of tests of the standard electroweak model and of searches for new physics in allowed nuclear β decay and neutron decay is reviewed including both theoretical and experimental developments. The sensitivity and complementarity of recent and ongoing experiments are discussed with emphasis on their potential to look for new physics. Measurements are interpreted using a model-independent effective field theory approach enabling to recast the outcome of the analysis in many specific new physics models. Special attention is given to the connection that this approach establishes with high-energy physics. A new global fit of available β-decay data is performed incorporating, for the first time in a consistent way, superallowed 0 + → 0 + transitions, neutron decay and nuclear decays. The constraints on exotic scalar and tensor couplings involving left-or right-handed neutrinos are determined while a constraint on the pseudoscalar coupling from neutron decay data is obtained for the first time as well. The values of the vector and axial-vector couplings, which are associated within the standard model to V ud and g A respectively, are also updated. The ratio between the axial and vector couplings obtained from the fit under standard model assumptions is C A /C V = −1.27510(66). The relevance of the various experimental inputs and error sources is critically discussed and the impact of ongoing measurements is studied. The complementarity of the obtained bounds with other low-and high-energy probes is presented including ongoing searches at the Large Hadron Collider.

show abstract

“…From the equation of motion in Eq. ( 5) for the Bose field operators, we obtain the continuity equation [59,60]…”

Section: A Current-current Response Functionsmentioning

confidence: 99%

Superfluidity of a Raman spin-orbit-coupled Bose gas at finite temperature

Chen,

Liu,

2022

Preprint

View full text Add to dashboard Cite

We investigate the superfluidity of a three-dimensional weakly interacting Bose gas with a onedimensional Raman-type spin-orbit coupling at both zero and finite temperatures. Using the imaginary-time Green's function within the Bogoliubov approximation, we explicitly derive analytic expressions of the current-current response functions in the plane-wave and zero-momentum phases, from which we extract the superfluid density in the limits of long wavelength and zero frequency. At zero temperature, we check that the resultant superfluid density agrees exactly with our previous analytic prediction obtained from a phase-twist approach. Both results also satisfy a generalized Josephson relation in the presence of spin-orbit coupling. At finite temperature, we find a significant non-monotonic temperature dependence of superfluid density near the transition from the plane-wave phase to the zero-momentum phase. We show that this non-trivial behavior might be understood from the sound velocity, which has a similar temperature dependence. The non-monotonic temperature dependence is also shared by Landau critical velocity, above which the spin-orbit-coupled Bose gas loses its superfluidity. Our results would be useful for further theoretical and experimental studies of superfluidity in exotic spin-orbit coupled quantum gases.

show abstract

Quantum Spin Dynamics in a Normal Bose Gas with Spin-Orbit Coupling

Cited by 7 publications

References 58 publications

Dark side of the neutron?

Dark side of the neutron?

New physics searches in nuclear and neutron β decay

Superfluidity of a Raman spin-orbit-coupled Bose gas at finite temperature

Contact Info

Product

Resources

About