Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Spiller, Tim"'
Autor:
Huttner, Bruno, Alléaume, Romain, Diamanti, Eleni, Fröwis, Florian, Grangier, Philippe, Hübel, Hannes, Martin, Vicente, Poppe, Andreas, Slater, Joshua A., Spiller, Tim, Tittel, Wolfgang, Tranier, Benoit, Wonfor, Adrian, Zbinden, Hugo
Publikováno v:
npj Quantum Inf 8, 108 (2022)
A recently published patent (https://www.ipo.gov.uk/p-ipsum/Case/PublicationNumber/GB2590064) has claimed the development of a novel quantum key distribution protocol purporting to achieve long-range quantum security without trusted nodes and without
Externí odkaz:
http://arxiv.org/abs/2210.01636
We report a large area photo-diode based homodyne detector for free-space quantum coherent communication. The detector's performance is studied in terms of detection bandwidth and electronic noise for shot-noise limited quantum signal detection. Usin
Externí odkaz:
http://arxiv.org/abs/2011.03843
Publikováno v:
Quantum Sci. Technol. 6, 035002 (2021)
Quantum entanglement is essential to the development of quantum computation, communications, and technology. The controlled SWAP test, widely used for state comparison, can be adapted to an efficient and useful test for entanglement of a pure state.
Externí odkaz:
http://arxiv.org/abs/2009.07613
Publikováno v:
Scientific Reports (2019)
Advances in highly sensitive detection techniques for classical coherent communication systems have reduced the received signal power requirements to a few photons per bit. At this level one can take advantage of the quantum noise to create secure co
Externí odkaz:
http://arxiv.org/abs/1907.09346
Autor:
De, Suvabrata, Spiller, Tim
We propose a protected qubit which is `dual' to a suggestion of a superconducting current mirror qubit [A. Kitaev, arXiv:0609441 (2006)]. Our construction can be regarded as the magnetic analogue of Kitaev's proposal: it inherits the intrinsic fault-
Externí odkaz:
http://arxiv.org/abs/1405.4446
Publikováno v:
Proc. SPIE 8773, Photon Counting Applications IV; and Quantum Optics and Quantum Information Transfer and Processing, 87730Y (May 6, 2013)
We study the effects of continuous measurement of the field mode during the collapse and revival of spin Schr\"{o}dinger cat states in the Tavis-Cummings model of N qubits (two-level quantum systems) coupled to a field mode. We show that a compromise
Externí odkaz:
http://arxiv.org/abs/1307.7637
Publikováno v:
Phys. Rev. A 85, 053805 (2012)
This paper derives master equations for an atomic two-level system for a large set of unitarily equivalent Hamiltonians without employing the rotating wave and certain Markovian approximations. Each Hamiltonian refers to physically different componen
Externí odkaz:
http://arxiv.org/abs/1111.7206
Autor:
Ionicioiu, Radu, Spiller, Tim P.
Publikováno v:
Phys. Rev. A 85, 062313 (2012)
A fundamental problem in quantum information is to describe efficiently multipartite quantum states. An efficient representation in terms of graphs exists for several families of quantum states (graph, cluster, stabilizer states), motivating us to ex
Externí odkaz:
http://arxiv.org/abs/1110.5681
Publikováno v:
2011 J. Phys.: Conf. Ser. 286 012020
One of the main proposed tools to transfer information in a quantum computational context are spin chains. While spin chains have shown to be convenient and reliable, it has to be expected that, as with any implementation of a physical system, they w
Externí odkaz:
http://arxiv.org/abs/1101.4509
Autor:
Lovett, Brendon W., Nazir, Ahsan, Pazy, Ehoud, Barrett, Sean D., Spiller, Tim P., Briggs, G. Andrew D.
Publikováno v:
Phys. Rev. B 72, 115324 (2005)
As a candidate scheme for controllably coupled qubits, we consider two quantum dots, each doped with a single electron. The spin of the electron defines our qubit basis and trion states can be created by using polarized light; we show that the form o
Externí odkaz:
http://arxiv.org/abs/quant-ph/0505055