Trapped-ion optical clocks can observe quantum signatures of proper time such as vacuum-induced second-order Doppler shifts and proper-time interferometry when atomic motion is squeezed.
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Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.
Room-temperature cavity with AlGaAs coatings achieves 4.2×10^{-17} fractional frequency instability, with birefringence fluctuations identified as a leading noise source and acceleration noise mitigated by feed-forward.
A resonant beam-driven polarimetry technique enables continuous non-destructive spin-frequency metrology in storage rings with T^{-3/2} scaling and coherence times approaching 10^5 s.
Modified QAE on D-Wave hardware yields magnetic dipole HFS constants for four light atomic systems that match GRASP results at limited precision.
In a minimal model of partially pumped atomic ensembles, collective dissipation induces interference that allows tuning linewidth from size-independent to extensive and photon statistics from antibunched to bunched via phase and pump rate.
A quartic extension of the twisting-and-turning Hamiltonian generates new unstable fixed points that accelerate short-time amplification of quantum fluctuations, yielding enhanced sensitivity within accessible coherence times.
The ground-state scalar and vector polarizabilities of 162Dy were measured near 530 nm via spin-dependent light shifts near the 530.306 nm intercombination line and agree with atomic-structure calculations.
Light-induced losses dominate DyK Feshbach molecule decay in most near-IR traps, but near 2000 nm collisional losses appear and are suppressed by an order of magnitude for the most weakly bound dimers due to Pauli exclusion.
citing papers explorer
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Quantum signatures of proper time in optical ion clocks
Trapped-ion optical clocks can observe quantum signatures of proper time such as vacuum-induced second-order Doppler shifts and proper-time interferometry when atomic motion is squeezed.
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Microsecond-Scale Coherent Control of a Forbidden Clock Transition with Doppler-Free Multiphoton Excitations
Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.
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Laser stabilized to a room temperature cavity with AlGaAs coatings reaching $4.2 \times 10^{-17}$ fractional frequency instability
Room-temperature cavity with AlGaAs coatings achieves 4.2×10^{-17} fractional frequency instability, with birefringence fluctuations identified as a leading noise source and acceleration noise mitigated by feed-forward.
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Continuous coherent spin-frequency metrology in storage rings via resonant beam-driven detection
A resonant beam-driven polarimetry technique enables continuous non-destructive spin-frequency metrology in storage rings with T^{-3/2} scaling and coherence times approaching 10^5 s.
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Applications of quantum annealing to magnetic dipole hyperfine structure constants: First results beyond energies for atoms
Modified QAE on D-Wave hardware yields magnetic dipole HFS constants for four light atomic systems that match GRASP results at limited precision.
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One knob to tune them all: Phase-controlled photon statistics and linewidth in partially pumped atomic ensembles
In a minimal model of partially pumped atomic ensembles, collective dissipation induces interference that allows tuning linewidth from size-independent to extensive and photon statistics from antibunched to bunched via phase and pump rate.
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Instability-Enhanced Quantum Sensing with Tunable Multibody Interactions
A quartic extension of the twisting-and-turning Hamiltonian generates new unstable fixed points that accelerate short-time amplification of quantum fluctuations, yielding enhanced sensitivity within accessible coherence times.
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Determination of the ground state polarizability of $^{162}$Dy near 530 nm
The ground-state scalar and vector polarizabilities of 162Dy were measured near 530 nm via spin-dependent light shifts near the 530.306 nm intercombination line and agree with atomic-structure calculations.
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Optically trapped Feshbach molecules of fermionic $^{161}$Dy and $^{40}$K: Role of light-induced and collisional losses
Light-induced losses dominate DyK Feshbach molecule decay in most near-IR traps, but near 2000 nm collisional losses appear and are suppressed by an order of magnitude for the most weakly bound dimers due to Pauli exclusion.