Zobrazeno 1 - 10
of 311
pro vyhledávání: '"Daniel, F. V."'
Autor:
Bao, Zhuoran, James, Daniel F. V.
It has been shown that the entanglement between the system state and the ancillary state is not a strict requirement for performing ancilla-assisted process tomography(AAPT). Instead, it only requires that the system-ancilla state be faithful, which,
Externí odkaz:
http://arxiv.org/abs/2312.14901
In this paper we consider two problems in diagnostics of trapped ion crystals in which an analysis of the ions' collective oscillatory motion yield potentially useful results. When one of the ions in a linear crystal undergoes a collision, observatio
Externí odkaz:
http://arxiv.org/abs/2212.02722
Autor:
James, Daniel F. V.
We consider the kinematics of bi-partite quantum states as determined by observable quantities, in particular the Bloch vectors of the subsystems. In examining the simplest case of a pair of two-level systems, there is a remarkable connection between
Externí odkaz:
http://arxiv.org/abs/2207.13808
Publikováno v:
Phys. Rev. A 100, 042332 (2019)
Quantum entanglement is an important resource for next-generation technologies. We show that diffracting systems can supplant beam splitters, and more generally interferometric networks, for entanglement generation -- systems as simple as screens wit
Externí odkaz:
http://arxiv.org/abs/1909.01354
Publikováno v:
Phys. Rev. A 99, 032345 (2019)
Recent development of mixed-state encoding (MSE) allows pure-state logical information to be encoded by a bosonic (continuous-variable) system in mixed physical state. Despite interest due to its counter-intuitiveness, the utility of the current MSE
Externí odkaz:
http://arxiv.org/abs/1812.04154
Publikováno v:
Phys. Rev. A 98, 032113 (2018)
Many protocols require precise rotation measurement. Here we present a general class of states that surpass the shot noise limit for measuring rotation around arbitrary axes. We then derive a quantum Cram\'er-Rao bound for simultaneously estimating a
Externí odkaz:
http://arxiv.org/abs/1806.02355
Publikováno v:
Journal of Physics A: Mathematical and Theoretical (2018), 51, 38
Beam splitters are routinely used for generating entanglement. Their entangling properties have been studied extensively, with nonclassicality of the input states a prerequisite for entanglement at the output. Here we quantify the amount of entanglem
Externí odkaz:
http://arxiv.org/abs/1712.05425
Publikováno v:
Phys. Rev. A 96, 053859 (2017)
Polarization of light is harnessed in an abundance of classical and quantum applications. Characterizing polarization in a classical sense is done resoundingly successfully using the Stokes parameters, and numerous proposals offer new quantum counter
Externí odkaz:
http://arxiv.org/abs/1710.06869
We analyze an experimental method for creating interesting nonclassical states by processing the entanglement generated when two large coherent states interact in a cross-Kerr medium. We specifically investigate the effects of loss and noise in every
Externí odkaz:
http://arxiv.org/abs/1706.03136
Autor:
Marshall, Kevin, James, Daniel F. V.
We propose a method to manipulate the normal modes in a chain of trapped ions using only two lasers. Linear chains of trapped ions have proven experimentally to be highly controllable quantum systems with a variety of refined techniques for preparati
Externí odkaz:
http://arxiv.org/abs/1610.04803