Quantum

Quantum Views publishes Perspectives, Editorials, and Leaps on research papers and other issues of relevance for Quantum.

Perspective

Perspective on: Switching Quantum Reference Frames for Quantum Measurement

Pierre Martin-Dussaud,

Quantum Views 4, 40 (2020).

Quantum reference frames In the last few years, the communities of quantum information and quantum gravity have been working together on the notion of $\textit{quantum reference frames}$. The…

Perspective

What is non-classical about quantum no-cloning?

Ana Belén Sainz,

Quantum Views 4, 39 (2020).

Contextuality Contextuality is one of the features of quantum theory that have no intuitive explanation. First identified by Bell back in 1964 [1], and later posed in more general terms by K…

Perspective

Nonlocality strikes again

Ivan Šupić,

Quantum Views 4, 38 (2020).

There is a certain type of papers whose value is that they are simple, yet very inspiring. There is no hard-core mathematical machinery behind, they rather witness a good intuition and under…

Perspective

Variational quantum algorithms and geometry

John Napp,

Quantum Views 4, 37 (2020).

Variational quantum algorithms Recent years have seen tremendous progress in the design of programmable quantum devices. Nonetheless, the construction of a scalable and fault-tolerant quantu…

Perspective

Twisting the noise away

Luca Pezzè,

Quantum Views 4, 36 (2020).

Entanglement-enhanced sensors Improving the performance of sensors by engineering specific quantum correlations between probe particles is a research frontier in quantum technology. Outstand…

Perspective

Unboxing hidden correlations

Patryk Lipka-Bartosik,

Quantum Views 4, 35 (2020).

Quantum entanglement allows spatially separated parties to share correlations which cannot be reproduced by any classical scheme. This means that the results of measurements performed locall…

Perspective

Topological Quantum Computing in Multiple Surface Codes

Paul Webster,

Quantum Views 4, 34 (2020).

Continued functionality in the event of an error in one or more components — referred to as fault tolerance — is integral to an effective system. For quantum computing, fault tolerance is…

Perspective

Bridging gaps between random approaches to quantum simulation

Leonardo Novo,

Quantum Views 4, 33 (2020).

The simulation of quantum systems is believed to be one of the main applications of quantum computers [1]. The work of Lloyd [2] was the first to propose how the time-evolution of a quantum…

Perspective

A non-review of Quantum Machine Learning: trends and explorations

Vedran Dunjko and Peter Wittek,

Quantum Views 4, 32 (2020).

About this non-review By mid-2019, both Peter and myself had found ourselves numerous times in situations where we were asked to define what Quantum Machine Learning is (and what it i…

Perspective

Contextuality is topological

Shane Mansfield,

Quantum Views 4, 31 (2020).

Contextuality Contextuality is a feature that arises in the empirical predictions of quantum theory, but which cannot arise in classical physics. First identified through the work of Bell [1…

Perspective

Stretching the limits of multiparticle entanglement

Géza Tóth,

Quantum Views 4, 30 (2020).

The classification of entangled mixed states in multiparticle systems is a difficult task. Even for three-qubit pure states, six classes arise that are inequivalent under Stochastic Local Op…

Perspective

Perspective on: Duality in Quantum Quenches and Classical Approximation Algorithms: Pretty Good or Very Bad

Nicholas Chancellor,

Quantum Views 4, 29 (2020).

This paper examines both a quantum, and highly related quantum inspired algorithm based on an instantaneous quantum quench. Since this algorithm uses a transverse field (single bit flip) dri…

Perspective

Geometry and quantum thermodynamics

John Goold,

Quantum Views 3, 28 (2019).

It has been known for quite some time that equilibrium thermodynamics can be recast in a general geometric framework by associating an intrinsic metric structure [1,2]. If fluctuations are i…

Perspective

Quantum measurements – yet another surprise

Eliahu Cohen,

Quantum Views 3, 27 (2019).

When you measure a quantum system, the outcome will be one of the eigenvalues of the measured (Hermitian) operator. If you perform this measurement over an ensemble of (normalized) pure stat…

Perspective

Matrix product state approximations: Bringing theory closer to practice

Yichen Huang,

Quantum Views 3, 26 (2019).

Classical simulation of quantum many-body systems is a fundamental challenge in condensed matter physics. Part of the difficulty stems from the fact that the dimension of the Hilbert space g…

Perspective

Optimal Heat-Bath Algorithmic Cooling

Martí Perarnau-Llobet,

Quantum Views 3, 25 (2019).

Cooling is arguably the most relevant thermodynamic task for quantum science and technologies, finding countless applications ranging from the preparation of pure states for quantum computat…

Category: Editorial