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YouTube video by Bogdan Nicolae Cojocaru 2

arXiv abstract link

Robbins's Quiet City returns to New York for the first time since 1991 as London City Ballet and Alina Cojocaru head to the Joyce Theater.

London City Ballet will return to New York’s Joyce Theater this October, presenting two contrasting mixed programmes that combine celebrated ballet classics with contemporary

Echipa națională a României, antrenată de Gică Hagi, se pregătește pentru meciul din Liga Națiunilor contra Suediei, programat la 21.45, pe Arena Națională. Într-un interviu pentru gsp.ro, fostul port… · Photo : Ralf Roletschek (talk) - Infos über Fahrräder auf fahrradmonteur.deWiki-Technologie für Schulen und Unternehmen · CC BY-SA · Wikimedia

YouTube video by adrian cojocaru

Liderul PSD Iaşi, Bogdan Cojocaru, a reacționat după ce Ilie Bolojan a fost audiat la DNA ca martor în dosarul omului de afaceri Fănel Bogos. Deputatul spune că premierul demis este implicat ”într-o afacere urât mirositoare cu şpăgi de sute de mii de euro”. În mesajul postat pe Facebook, Cojocaru a scris că ”acesta-i PNL-ul […]

Según Veronica Cojocaru, jefa de la delegación moldava, la UER ha concedido una prórroga a la cadena pública para que acuerde si asisten o no a la 71ª edición del festival europeo.

Moldovan broadcaster TRM has been given an extension to decide whether it wants to participate at the upcoming Eurovision Song Contest in Burgas. Extra time after TRM scandal in May In a conversation with Polish Eurovision outlet ESCSpot, it was announced by Moldovan Head of Delegation Veronica Cojocaru that TRM has been given more time to confirm if it will take part next May. She added that the decision will be made and the public will be informed "in a few days". She explained: Of course, we have informed the EBU of our need for a longer deadline to confirm our participation in the competition.

arXiv abstract link

**Authors:** Atul Singh Arora, Shantanav Chakraborty, Alexandru Cojocaru, Sreyas Saminathan, Uttam Singh We prove maximal separations: $n$-qubit systems can have $Θ(n)$ ergotropy, while every efficient process extracts negligible work, even for Hamiltonians consisting of single-qubit terms. We establish an unconditional existential separation and give an explicit construction in the random oracle model. Assuming the existence of quantum-secure pseudorandom functions, this separation extends to the plain model. This work uncovers an important connection between ergotropy and the complexity of catalytic computation---computation where auxiliary qubits must be finally restored to their initial state. Relative to a random oracle, we establish relational and decision problems that: (i) can be solved efficiently with $λ$ catalysts; but (ii) cannot be solved by any algorithm with $cλ$ catalysts, for any $c<1$. We show this by proving query lower bounds for quantum-space bounded algorithms. As a consequence, for computational ergotropy, catalysts prove to be surprisingly powerful---there is a family of Hamiltonians and states for which catalysts enable efficient extraction of the full $Θ(n)$ ergotropy, while every efficient non-catalytic process extracts negligible work. Furthermore, catalysts also allow us to introduce and instantiate the notion of pseudoergotropy---analogous to pseudorandomness. On the other hand, we show catalysts do not change (information-theoretic) ergotropy. Finally, our work also sheds light on the classical aspect of the problem. First, most of our constructions rely on classical states and Hamiltonians and therefore imply analogous results for classical ergotropy. Second, we show that certain proof of quantumness protocols can be used to generically separate classical and quantum catalytic ergotropy.

YouTube video by Bogdan Nicolae Cojocaru 2

Valentin Cojocaru, portarul echipei Pogon Szczecin, a fost convocat de Gică Hagi pentru meciul dintre România și Suedia, din cadrul Ligii Națiunilor. Acesta este unul dintre surprizele selecționerului… · Photo : Paolo Camera · CC BY · Flickr

YouTube video by Bogdan Nicolae Cojocaru

Selecționerul Gheorghe Hagi a anunțat, vineri, lotul României pentru cele patru partide programate în această toamnă în Liga Națiunilor. Pe lista convocărilor se află 34 de jucători. Portari: Ionuț Radu (Celta Vigo, Spania), Otto Hindrich (Legia Varșovia, Polonia) și Valentin Cojocaru (Pogon Szczecin, Polonia). Fundași: Andrei Rațiu (Rayo Vallecano, Spania), Tony Strata (Vitória Guimarães, Portugalia), […]