Abstract:

]]>The Zeno effect occurs in quantum systems when a very strong measurement is applied, which can alter the dynamics in non-trivial ways. Despite being dissipative, the measurement divides the Hilbert space into subspaces with distinct eigenvalues of the measured observable, and give rise to `Zeno dynamics’ within each subspace. The dynamics stay coherent within any degenerate subspaces of the measurement, and surprisingly can transform a trivial (e.g., non-interacting with local control only) quantum system into one with universal control within the Zeno subspace. We will show how the application of such a measurement can turn a single-qubit operation into a two- or multi-qubit entangling gate in a non-interacting system. We demonstrate this gate between two effectively non-interacting transmon qubits.

Our Zeno gate works by imparting a geometric phase on the system, conditioned on it lying within a particular non-local subspace. These results demonstrate how universality can be generated not only by non-local coherent interactions as is typically employed in quantum information platforms, but also by dissipative measurements.

Here’s an interesting video highlighting some of the top women in this emerging field.

]]>In this lecture she talks about the conceptual and mathematical background of Quantum Computing. Later, she also answers questions posed by students on the topic.

]]>]]>Quantum operations with better than 99% fidelity were also demonstrated in two similar experiments at TU Delft and RIKEN, signalling the global maturity of quantum information processing in silicon.

]]>We will see that there is a close link between self-testing and representations of algebraic relations. We will leverage this link to propose a family of protocols capable of certifying quantum states and measurements of arbitrarily large dimension with just four binary-outcome measurements.

]]>Multiple countries have started taking initiatives of allocating millions of dollars budget for investing in quantum computing to discover and solve unapproachable problems. This article features budget allocations for Quantum computing for some of the top countries.

This is part of Qubit by Qubit’s Quantum Lightning Talks series where researchers present a quick-pitch of their research for high school-level audiences.

]]>]]>Quantum computers are supposed to change our lives, but what makes them so powerful?

A brief overview on quantum computation: its power, the current status and the magic behind. Irati Alonso always had a clear fascination for science and technology and inspired by her physics teacher, she started her studies in physics at the Basque Country University in Bilbao.

]]>Imagine you are given a box and you can’t see what’s inside. All you know is that it is either empty, or it contains a highly sensitive bomb. If this bomb is hit by even a single photon, it will explode. Your challenge is to work out

whether or not there is a bomb in the box, without exploding it. Classically, this is impossible. As soon as you try to detect the bomb, it will interact with your detector and explode. But in 1993, quantum physicists Avshalom Elitzur and Lev Vaidman proposed a quantum bomb tester, which allows us to see a bomb without looking.