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Thermodynamic stability of a spin microemulsion in Rashba spin-orbit-coupled bosons
Recent finite-temperature numerical simulations have unveiled a quantum “spin” microemulsion analog, found by raising the temperature of a stripe supersolid phase in a Rashba spin-orbit coupled Bose gas. This microemulsion state is a highly correlated, isotropic normal fluid where atoms self-arrange based on their internal pseudospin into patterns that resemble bicontinuous microemulsions. This finding leaves several open questions regarding the broader accessibility of this phase in experiments. Here, we use equilibrium finite-temperature numerical simulations based on a coherent-state path integral representation to perform a computational investigation into the thermodynamic stability of the spin microemulsion state. Numerical simulations emphasize the requirement of a nearly, but not perfectly, isotropic spin-orbit coupling in order to achieve the microemulsion phase in cold-atom experiments. Moreover, the microemulsion state exists independent of miscibility of the pseudospin components and for a wide range of pseudospin population imbalance, suggesting a high degree of flexibility in choosing the atom and hyperfine states in an experimental realization. Lastly, we demonstrate this feasibility by mimicking a Rashba spin-orbit-coupled 87 Rb experiment in an isotropic harmonic trap, where we confirm the microemulsion's existence via its density profile and equilibrium quasimomentum distribution.
Universal control in bosonic systems with weak Kerr nonlinearities
Resonators with weak single-photon self-Kerr nonlinearities can theoretically be used to prepare Fock states in the presence of a loss much larger than their nonlinearities. Two necessary ingredients are large displacements and a two-photon (parametric) drive. Here, in this study, we find that these systems can be controlled to achieve any desired gate operation in a finite-dimensional subspace (whose dimensionality can be chosen at will). Moreover, we show that the two-photon driving requirement can be relaxed and that full controllability is achievable with only one-photon (linear) drives. We make use of both Trotter-Suzuki decompositions and gradient-based optimization to find control pulses for a desired gate, which reduces the computational overhead by using a small blockaded subspace. We also discuss the infidelity arising from input power limitations in realistic settings, as well as from corrections to the rotating-wave approximation. Our universal control protocol opens the possibility for quantum information processing using a wide range of lossy systems with weak nonlinearities.
Second moment of Hafnians in Gaussian boson sampling
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Accuracy of ghost-rotationally-invariant slave-boson theory for multiorbital Hubbard models and realistic materials
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Quantum transport in an environment parametrized by dispersive bosons
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Models of interacting bosons with exact ground states: A unified approach
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Di-Higgs boson peaks and top valleys: Interference effects in Higgs sector extensions
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Isolating color-singlet boson jets at the LHC using telescoping jet substructure
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Origin of sterile neutrino dark matter via secret neutrino interactions with vector bosons
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Exotic Higgs boson decays and the electroweak phase transition
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Probing light gauge bosons in tau neutrino experiments
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Search for heavy neutral Higgs bosons produced in association with b -quarks and decaying into b -quarks at s = 13 TeV with the ATLAS detector
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Dark matter constraints on low mass and weakly coupled B − L gauge boson
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Search for intermediate resonances and dark gauge bosons in J / ψ → γ π 0 η ′
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Di-Higgs resonance searches in weak boson fusion
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