5 papers
Rotational Quantum Tunneling of a Magnetic Dipole in a Superconducting Trap
Francis J. Headley, Fabian Müller, Emre Köse +3
We study the quantum dynamics of the rotational degree of freedom of a nano-magnet trapped in a superconducting trap. The nano-magnet is modeled as a magnetic dipole with magnetiza…
Path Integral Approach to Quantum Fisher Information
Francis J. Headley, Mahdi RouhbakhshNabati, Henry Harper-Gardner +3
We present a real-time path-integral formulation of the quantum Fisher information for dynamical parameter estimation. For pure states undergoing unitary evolution, we show that th…
Semiclassical Approach to Quantum Fisher Information
Mahdi RouhbakhshNabati, Daniel Braun, Henning Schomerus
Quantum sensors driven into the quantum chaotic regime can have dramatically enhanced sensitivity, which, however, depends intricately on the details of the underlying classical ph…
Interferometric Mass Photometry at the Quantum Limit of Sensitivity
Fabian Müller, Emre Köse, Alfred J. Meixner +2
We present an innovative optical imaging system for measuring parameters of a small particle such as a macromolecule or nanoparticle at the quantum limit of sensitivity. In compari…
Simulation of the Dissipative Dynamics of Strongly Interacting NV Centers with Tensor Networks
Jirawat Saiphet, Daniel Braun
NV centers in diamond are a promising platform for highly sensitive quantum sensors for magnetic fields and other physical quantities. The quest for high sensitivity combined with…