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Articles by Gerard Higgins
Backaction-evading receivers with magnetomechanical and electromechanical sensors
Today's mechanical sensors are capable of detecting extremely weak perturbations while operating near the standard quantum limit. However, further improvements can be made in both sensitivity and bandwidth when we reduce the noise originating from the process of measurement itself—the quantum-mechanical backaction of measurement—and go below this ‘standard’ limit, possibly approaching the Heisenberg limit.
Superconducting Microsphere Magnetically Levitated in an Anharmonic Potential with Integrated Magnetic Readout
Abstract Magnetically levitated superconducting microparticles offer a promising path to quantum experiments with picogram to microgram objects. In this work, we levitate a 700 ng∼1017amu superconducting microsphere in a magnetic chip trap in which detection is integrated. We measure the center-of-mass motion of the particle using a dc superconducting quantum interference device magnetometer.
Steady-state entanglement generation for nondegenerate qubits
Abstract We propose a scheme to dissipatively produce steady-state entanglement in a two-qubit system, via an interaction with a bosonic mode. The system is driven into a stationary entangled state, while we compensate the mode dissipation by injecting energy via a coherent pump field. We also present a scheme which allows us to adiabatically transfer all the population to the desired entangled state.
Help on hand as tax deadline looms
Help is available to people struggling with their tax forms. Personal tax returns have to be in by October 6th. The Treasury is putting on additional help for people this week. An out-of-hours telephone service will be in place at the following times: Business Solutions Group Manager Gerard Higgins says: "We have once again seen a marked increase in the number of people submitting their return online this year, and are ready to help more through the online process as the deadline gets closer.
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