Prospects and challenges for squeezing-enhanced optical atomic clocks
M Schulte, C Lisdat, PO Schmidt, U Sterr… - Nature …, 2020 - nature.com
Optical atomic clocks are a driving force for precision measurements due to the high
accuracy and stability demonstrated in recent years. While further improvements to the …
accuracy and stability demonstrated in recent years. While further improvements to the …
Quantum simulations of interacting systems with broken time-reversal symmetry
Many-body systems of quantum interacting particles in which time-reversal symmetry is
broken give rise to a variety of rich collective behaviors and are, therefore, a major target of …
broken give rise to a variety of rich collective behaviors and are, therefore, a major target of …
Quantum simulations with complex geometries and synthetic gauge fields in a trapped ion chain
In recent years, arrays of atomic ions in a linear radio-frequency trap have proven to be a
particularly successful platform for quantum simulation. However, a wide range of quantum …
particularly successful platform for quantum simulation. However, a wide range of quantum …
Suppressing inhomogeneous broadening in a lutetium multi-ion optical clock
We demonstrate precision measurement and control of inhomogeneous broadening in a
multi-ion clock consisting of three Lu+ 176 ions. Microwave spectroscopy between hyperfine …
multi-ion clock consisting of three Lu+ 176 ions. Microwave spectroscopy between hyperfine …
Optimal joint estimation of multiple Rabi frequencies
We study the joint estimation of multiple Rabi frequencies in a multilevel system. By
analytically identifying the optimal probe state and the optimal measurement, we obtain the …
analytically identifying the optimal probe state and the optimal measurement, we obtain the …
Heisenberg-limit spin squeezing with the spin Bogoliubov Hamiltonian
J Zhang, S Chang, W Zhang - Physical Review A, 2024 - APS
It is well established that the optimal spin squeezing under a one-axis-twisting Hamiltonian
follows a scaling law of J− 2/3 for J interacting atoms after a quench dynamics. Here, we …
follows a scaling law of J− 2/3 for J interacting atoms after a quench dynamics. Here, we …
Quantum logic spectroscopy with ions in thermal motion
A mixed-species geometric phase gate has been proposed for implementing quantum logic
spectroscopy on trapped ions, which combines probe and information transfer from the …
spectroscopy on trapped ions, which combines probe and information transfer from the …
Quantum squeezing cannot beat the standard quantum limit
LP McGuinness - arXiv preprint arXiv:2306.14666, 2023 - arxiv.org
Quantum entanglement between particles is expected to allow one to perform tasks that
would otherwise be impossible. In quantum sensing and metrology, entanglement is often …
would otherwise be impossible. In quantum sensing and metrology, entanglement is often …
Time–energy quantum uncertainty: Quantifying the effectiveness of surface defect passivation protocols for low-dimensional semiconductors
The degree of enhancement in radiative recombination in ensembles of semiconductor
nanowires after chemical treatment is quantified within a derived limit by correlating the …
nanowires after chemical treatment is quantified within a derived limit by correlating the …
The case against entanglement improved measurement precision
LP McGuinness - arXiv preprint arXiv:2112.04354, 2021 - arxiv.org
It is widely accepted that quantum entanglement between otherwise independent sensors
can yield a measurement precision beyond that achievable when the same resources are …
can yield a measurement precision beyond that achievable when the same resources are …