Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Knee, George C."'
Autor:
Xu, Liang, Liu, Zexuan, Datta, Animesh, Knee, George C., Lundeen, Jeff S., Lu, Yan-qing, Zhang, Lijian
Publikováno v:
Phys. Rev. Lett. 125, 080501 (2020)
Weak value amplification (WVA) is a metrological protocol that amplifies ultra-small physical effects. However, the amplified outcomes necessarily occur with highly suppressed probabilities, leading to the extensive debate on whether the overall meas
Externí odkaz:
http://arxiv.org/abs/2005.03629
Publikováno v:
Phys. Rev. A 99, 032328 (2019)
Users of quantum computers must be able to confirm they are indeed functioning as intended, even when the devices are remotely accessed. In particular, if the Hilbert space dimension of the components are not as advertised -- for instance if the qubi
Externí odkaz:
http://arxiv.org/abs/1811.05220
Publikováno v:
Journal of Physics Communications, Volume 3, Number 7 (2019)
Quantum state tomography often operates in the highly idealised scenario of assuming perfect measurements. The errors implied by such an approach are entwined with other imperfections relating to the information processing protocol or application of
Externí odkaz:
http://arxiv.org/abs/1809.07970
Autor:
Knee, George C., Briggs, G. Andrew D.
A weak value is an effective description of the influence of a pre and post-selected 'principal' system on another 'meter' system to which it is weakly coupled. Weak values can describe anomalously large deflections of the meter, and deflections in o
Externí odkaz:
http://arxiv.org/abs/1808.03562
Publikováno v:
Phys. Rev. A 98, 052328 (2018)
Identifying non-classicality unambiguously and inexpensively is a long-standing open challenge in physics. The No-Signalling-In-Time protocol was developed as an experimental test for macroscopic realism, and serves as a witness of quantum coherence
Externí odkaz:
http://arxiv.org/abs/1807.10184
Publikováno v:
Phys. Rev. A 98, 062336 (2018)
We present an algorithm for projecting superoperators onto the set of completely positive, trace-preserving maps. When combined with gradient descent of a cost function, the procedure results in an algorithm for quantum process tomography: finding th
Externí odkaz:
http://arxiv.org/abs/1803.10062
Autor:
Lyons, Ashley, Knee, George C., Bolduc, Eliot, Roger, Thomas, Leach, Jonathan, Gauger, Erik M., Faccio, Daniele
When two indistinguishable photons are each incident on separate input ports of a beamsplitter they `bunch' deterministically, exiting via the same port as a direct consequence of their bosonic nature. This two-photon interference effect has long-hel
Externí odkaz:
http://arxiv.org/abs/1708.08351
Publikováno v:
J. Phys. Chem. Lett. 2017 8 (10) pp 2328-2333
We study a large number of physically-plausible arrangements of chromophores, generated via a computational method involving stochastic real-space transformations of a naturally occurring `reference' structure, illustrating our methodology using the
Externí odkaz:
http://arxiv.org/abs/1704.01795
Publikováno v:
Phys. Rev. A 95, 032122 (2017)
Testing quantum theory on macroscopic scales is a longstanding challenge that might help to revolutionise physics. For example, laboratory tests (such as those anticipated in nanomechanical or biological systems) may look to rule out macroscopic real
Externí odkaz:
http://arxiv.org/abs/1701.04630
Autor:
Knee, George C.
In this thesis I discuss the nature of ‘measurement’ in quantum theory. ‘Measurement’ is associated with several different processes: the gradual imprinting of information about one system onto another, which is well understood; the collapse
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604537