Kent, Adrian
Published in
Foundations of Physics

There has been an upsurge of interest lately in developing Wigner’s hypothesis that conscious observation causes collapse by exploring dynamical collapse models in which some purportedly quantifiable aspect(s) of consciousness resist superposition. Kremnizer–Ranchin, Chalmers–McQueen and Okon–Sebastián have explored the idea that collapse may be as...

Mittal, Vikash Raj, Aswathy Dey, Sanjib Goyal, Sandeep K.
Published in
Scientific Reports

Discrete-time quantum walks are known to exhibit exotic topological states and phases. Physical realization of quantum walks in a lossy environment may destroy these phases. We investigate the behaviour of topological states in quantum walks in the presence of a lossy environment. The environmental effects in the quantum walk dynamics are addressed...

Chen, Hong-Bin Chen, Yueh-Nan
Published in
Scientific Reports

An important mathematical tool for studying open quantum system theory, which studies the dynamics of a reduced system, is the completely positive and trace-preserving dynamical linear map parameterized by a special parameter-time. Counter-intuitively, akin to the Fourier transform of a signal in time-sequence to its frequency distribution, the tim...

Sokolovski, D. Akhmatskaya, E.
Published in
Scientific Reports

A controversy surrounding the “tunnelling time problem” stems from the seeming inability of quantum mechanics to provide, in the usual way, a definition of the duration a particle is supposed to spend in a given region of space. For this reason, the problem is often approached from an “operational” angle. Typically, one tries to mimic, in a quantum...

Kumar, Rajesh Kumari, Suchi Bala, Manju
Published in
Social Network Analysis and Mining

The social network plays a significant role in the exchange of information in the system. Information sharing includes the exchange of ideas, thoughts, opinions about some product, politics, etc. It is essential to find the amount of information shared between the nodes in the network. Therefore, we introduced a quantum mechanical model for informa...

Pizzi, Andrea Knolle, Johannes Nunnenkamp, Andreas
Published in
Nature Communications

Discrete time crystals are typically characterized by a period doubled response with respect to an external drive. Here, the authors predict the emergence of rich dynamical phases with higher-order and fractional periods in clean spin-1/2 chains with long-range interactions.

Yang, Jianhao M.
Published in
Scientific Reports

Relational formulation of quantum mechanics is based on the idea that relational properties among quantum systems, instead of the independent properties of a quantum system, are the most fundamental elements to construct quantum mechanics. In a recent paper (Yang in Sci Rep 8:13305, 2018), basic relational quantum mechanics framework is formulated ...

Acuña, Pablo
Published in
European Journal for Philosophy of Science

It is a widespread belief that the Kochen-Specker theorem imposes a contextuality constraint on the ontology of beables in quantum hidden variables theories. On the other hand, after Bell’s influential critique, the importance of von Neumann’s wrongly called ‘impossibility proof’ has been severely questioned. However, Max Jammer, Jeffrey Bub and De...

Khaywah, Mohammad Potdevin, Audrey Réveret, François Mahiou, Rachid Ouerdane, Youcef Désert, Anthony Parola, Stéphane Chadeyron, Geneviève Centeno, Emmanuel Smaali, Rafik
...

Improving phosphor photoluminescence efficiency is a key parameter to boost the performances of many optical devices. In this work, colloidal silver nanocubes, homogeneously spread on a luminescent surface, have proved to help both injecting and extracting light in and out of the photoluminescent layer and hence contributed significantly to the enh...

Le Floch, Yohann Vũ Ngọc, San

We prove that semitoric systems are completely spectrally determined : from the joint spectrum of a quantum semitoric system, in the semiclassical limit, one can recover all symplectic invariants of the underlying classical semitoric system. Moreover, by using specific algorithms, we obtain a constructive way of doing so.