Zobrazeno 1 - 10
of 279
pro vyhledávání: '"Ralph, J. F."'
Autor:
Gordon, Ralph J. F. H.1 (AUTHOR) r.j.f.h.gordon@soton.ac.uk, Worsley, Peter R.2 (AUTHOR), Filingeri, Davide1 (AUTHOR)
Publikováno v:
PLoS ONE. 5/10/2024, Vol. 19 Issue 5, p1-14. 14p.
Publikováno v:
PLoS ONE, Vol 19, Iss 5 (2024)
Externí odkaz:
https://doaj.org/article/d0498dfd3b5d47fea63b410dd6e6648a
Publikováno v:
Phys. Rev. A 94, 062312 (2016)
We consider the problem of estimating multiple phases using a multi-mode interferometer. In this setting we show that while global strategies with multi-mode entanglement can lead to high precision gains, the same precision enhancements can be obtain
Externí odkaz:
http://arxiv.org/abs/1601.05912
Autor:
Hill, Charles D., Ralph, J. F.
In this paper we show how weak joint measurement and local feedback can be used to control entanglement generation between two qubits. To do this, we make use of a decoherence free subspace (DFS). Weak measurement and feedback can be used to drive th
Externí odkaz:
http://arxiv.org/abs/0709.4217
Autor:
Hill, Charles D., Ralph, J. F.
In this paper we consider feedback control algorithms for the rapid purification of a bipartite state consisting of two qubits, when the observer has access to only one of the qubits. We show 1) that the algorithm that maximizes the average purificat
Externí odkaz:
http://arxiv.org/abs/quant-ph/0610156
Publikováno v:
Phys. Rev. B 75, 014511 (2007)
We propose techniques for implementing two different rapid state purification schemes, within the constraints present in a superconducting charge qubit system. Both schemes use a continuous measurement of charge (z) measurements, and seek to minimize
Externí odkaz:
http://arxiv.org/abs/quant-ph/0610044
Autor:
Wiseman, H. M., Ralph, J. F.
Publikováno v:
New J. Phys. 8 (2006) 90
This paper reconsiders the claimed rapidity of a scheme for the purification of the quantum state of a qubit, proposed recently in Jacobs 2003 Phys. Rev. A67 030301(R). The qubit starts in a completely mixed state, and information is obtained by a co
Externí odkaz:
http://arxiv.org/abs/quant-ph/0603062
Publikováno v:
Phys. Rev. B 74, 094510 (2006)
A theoretical spectroscopic analysis of a microwave driven superconducting charge qubit (Cooper-pair box coupled) to an RLC oscillator model is performed. By treating the oscillator as a probe through the backreaction effect of the qubit on the oscil
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510087
Publikováno v:
Phys. Rev. B 72, 014508 (2005)
In this paper we study, by analogy with quantum optics, the superconducting quantum interference device (SQUID) ring mediated quantum mechanical interaction of an input electromagnetic field oscillator mode with two or more output oscillator modes at
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507712
Publikováno v:
PHYSICAL REVIEW B 72, 094509 (2005)
We consider the interaction of a quantum mechanical SQUID ring with a classical resonator (a parallel $LC$ tank circuit). In our model we assume that the evolution of the ring maintains its quantum mechanical nature, even though the circuit to which
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505390