Search results for " state"
showing 10 items of 5973 documents
Selective writing and read-out of a register of static qubits
2013
We propose a setup comprising an arbitrarily large array of static qubits (SQs), which interact with a flying qubit (FQ). The SQs work as a quantum register, which can be written or read-out by means of the FQ through quantum state transfer (QST). The entire system, including the FQ's motional degrees of freedom, behaves quantum mechanically. We demonstrate a strategy allowing for selective QST between the FQ and a single SQ chosen from the register. This is achieved through a perfect mirror located beyond the SQs and suitable modulation of the inter-SQ distances.
Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
2020
We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the X structure of the initial state. The quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state.
Correspondence between generalized binomial field states and coherent atomic states
2008
We show that the N-photon generalized binomial states of electromagnetic field may be put in a bijective mapping with the coherent atomic states of N two-level atoms. We exploit this correspondence to simply obtain both known and new properties of the N-photon generalized binomial states. In particular, an over-complete basis of these binomial states and an orthonormal basis are obtained. Finally, the squeezing properties of generalized binomial state are analyzed.
Experimental Engineering of Arbitrary Qudit States with Discrete-Time Quantum Walks
2019
The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbitrary quantum states. Here we affirm such potential in a linear-optics platform that realizes discrete-time quantum walks in the orbital angular momentum degree of freedom of photons. Different classes of relevant qudit states in a six-dimensional space are prepared and measured, confirming the feasibility of the protocol. Our results represent a further investigation of quantum walk dynamics in p…
Identification of the Jπ = 1− state in 218Ra populated via α decay of 222Th
2016
The α decay of 222Th populating the low-lying J π = 3− state, and also a proposed 1− state, in 218Ra has been observed. The observations suggest an excitation energy of 853 keV for the 1− state, which is 60 keV above the 3− state. The hindrance factors of these α decays give a possible boundary to the region of ground-state octupole deformation in the light-actinide nuclei. The relative positions of the J π = 1− and 3− states suggest they are produced by an octupole-vibrational mechanism, as opposed to α clustering or rotations of a reflection-asymmetric octupole-deformed shape. peerReviewed
Reputation and financial reporting in Finnish public organizations
2021
PurposeThis article analyzes the links between financial reports and reputation in the context of Finnish public sector organizations. In general, the paper discusses the accounting treatment of intangible and tangible assets and the quality and relevance of public sector financial reporting.Design/methodology/approachFor data, we combine three data sets: financial statement information of eight anonymous Finnish public organizations, the results of a reputation survey among their key stakeholders (N = 914) and a sample of the social media sentiment around the organizations.FindingsOur findings suggest that a decrease in spending and, surprisingly in the nonprofit sector, an increase in the…
Urheilu, rasismi ja Washingtonin punanahat
2014
[Johdanto] Tänä kesänä Yhdysvalloissa on keskusteltu urheiluun liittyvästä rasismista kahdessa merkittävässä tapauksessa, jotka ovat muodostuneet monilta osin toistensa vastakohdiksi. Huhtikuussa Los Angelesilaisen koripallojoukkueen omistaja Donald Sterling jäi kiinni rasistisista puheistaan, jotka hänen tietämättään nauhoitettiin. Sterling sai NBA-liigalta nopeasti elinikäisen toimintakiellon ja joutui myymään joukkueensa. Sterlingin tapauksessa korostettiin sitä, miten amerikkalaisen yhteiskunnassa vallitsee nollatoleranssi rasismin suhteen. Samaan aikaan on käyty myös toista keskusteltu myös siitä, tulisiko Washington Redskins-jalkapallojoukkueen vaihtaa Yhdysvaltain alkuperäisväestöä h…
Stan zachowania gatunków drzew rosnących na rekultywowanych powierzchniach wyrobisk śląskich zakładów przemysłu wapienniczego "Opolwap" S.A
2004
Województwo opolskie charakteryzuje się występowaniem dużych pokładów skał węglanowych. Służą one jako surowiec dla przemysłu cementowo-wapienniczego. Eksploatacja wapieni wiąże się z ogromnymi przekształceniami geomechanicznymi powierzchni ziemi. Jednym z podstawowych problemów wynikających z działalności przemysłu wapienniczego jest rekultywacja terenów przekształconych. W latach 2000-2001 prowadzone były badania dotyczące stanu zachowania upraw leśnych występujących na rekultywowanych powierzchniach Śląskich Zakładów Przemysłu Wapienniczego "Opolwap" S.A w Tarnowie Opolskim. Zakres prac obejmował wykonanie inwentaryzacji drzew oraz określenie ich kondycji zdrowotnej. Powierzchnie badawcz…
The SO2F2 quasi-spherical top: Correspondence between tensorial and Watson's formalisms
2006
Abstract The SO2F2 quasi-spherical top molecule with C2v symmetry is considered as a distorted spherical top deriving from the SO 4 2 − tetrahedral ion. We present here a detailed correspondence between the tensorial formalism using the Td⊃C2v reorientation and the usual Hamiltonian of Watson. We have also performed ab initio calculations in order to determine the centrifugal distorsion constants in the vibrational ground state.
La parifica dei rendiconti regionali: un caso ancora aperto
2022
The extension of the financial audit to the Regions reveals a physiological distortion between the function and legal regime of the institution that arises several relevant issues: on the one hand, in terms of the legal nature of this form of judgment; on the other hand, on a systematic level, with regard to its insertion in a constitutional structure at least formally characterized by a strong regionalism and a related apparatus of guarantees. In the case law of the Court of Auditors, in particular, it has not been clarified whether the financial audit is a real form of financial control or, in the light of the guidelines of the Constitutional Court, a form of jurisdiction. In the absence …