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Fundamental quantum limits of optomechanical sensors

Dominic Branford and Animesh Datta, working in collaboration with Haixing Miao (University of Birmingham), have published a paper on the fundamental quantum limits of optomechanical sensors in Physical Review Letters (DOI: 10.1103/PhysRevLett.121.110505). Being able to measure very weak forces is central to many applications, such as the direct detection of gravitational waves and monitoring subterranean movement of magma in volancially-active areas. The strength of a force can be inferred through its effect of displacing a mass: the displacement can be sensed by illuminating it with a laser and observing the reflected light, a case of optomechanical sensing. In this work, Dominic, Haixing and Animesh study the best precision attainable by optomechanical sensors when multi-coloured light is used.

Thu 13 September 2018, 16:17 | Tags: Research

IoP eBook on " Tetraquarks and Pentaquarks" published

Greig Cowan and Tim Gershon describe recent discoveries of new types of matter called tetraquarks and pentaquarks, and discuss the outlook for understanding these particles.

Wed 29 August 2018, 10:48 | Tags: Research

How quantum do you need to be to check a quantum computer?

Quantum computers are capable of solving certain problems whose scale lies outside that of classical computers. For some of these problems not even the solution can be efficiently checked with a classical computer. While schemes can verify an arbitrary quantum computation with a limited set of quantum operations, the minimum quantum resources to perform such a verification is an open question. Samuele, Theodoros, and Animesh from the quantum information group have published a paper on verification in Physical Review A (DOI: https://doi.org/10.1103/PhysRevA.98.022323) demonstrating an improvement on the existing requirements for schemes to verify quantum computations. In this work the authors demonstrate a verification scheme which works with a further reduced number of such quantum operations.

Thu 23 August 2018, 11:53 | Tags: Research

Predictable aspects of the variable likelihood of extreme space weather events

Solar activity drives Earth’s space weather. Each solar cycle has a different intensity but we found cycle invariant properties constraining the chance of space storms which affect systems at Earth.

Mon 23 July 2018, 11:03 | Tags: Research

Touching proteins with virtual bare hands

The ability to precisely visualize the atomic geometry of the interactions between a drug and its protein target in structural models is critical in predicting the correct modifications in previously identified inhibitors to create more effective next generation drugs. We have combined VR visualization with fast algorithms for simulating intramolecular motions of protein flexibility, in an effort to further improve structure-led drug design by exposing molecular interactions that might be hidden in the less informative static models.

Sun 15 July 2018, 21:16 | Tags: Research

Is Gravity a Quantum Force?

A new proposal could be the first to test if gravity is quantum.

Tue 29 May 2018, 11:04 | Tags: Research

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