Universal entangler

... The entangling mechanism is called an exponential-SWAP gate. In the study, researchers demonstrated the new technology by deterministically entangling encoded states in any chosen configurations or codes, each housed in two otherwise isolated, 3-D superconducting microwave cavities.

Read more at: https://phys.org/news/2019-02-universal-entangler-quantum-tech.html

The Secrets of Quantum Physics - Einsteins Nightmare


from 36 min 






Navy files for patent on room-temperature superconductor

https://phys.org/news/2019-02-navy-patent-room-temperature-superconductor.amp



Illustration of the room-temperature superconductor design described in the U.S. Navy's patent application. Credit: U.S. Patent and Trademark Office

A scientist working for the U.S. Navy has filed for a patent on a room-temperature superconductor, representing a potential paradigm shift in energy transmission and computer systems.

Salvatore Cezar Pais is listed as the inventor on the Navy's patent applicationmade public by the U.S. Patent and Trademark Office on Thursday.
The application claims that a room-temperature superconductor can be built using a wire with an insulator core and an aluminum PZT (lead zirconate titanate) coating deposited by vacuum evaporation with a thickness of the London penetration depth and polarized after deposition.
An  is circumferentially positioned around the coating such that when the coil is activated with a pulsed current, a non-linear vibration is induced, enabling room temperature superconductivity.
"This concept enables the transmission of electrical power without any losses and exhibits optimal thermal management (no )," according to the patent document, "which leads to the design and development of novel energy generation and harvesting devices with enormous benefits to civilization."
No data was included in the patent documents.
A room-temperature superconductor is a material that is capable of exhibiting superconductivity at temperatures around 77 degrees Fahrenheit.
Current superconductors work when cooled near absolute zero, and the warmest superconductor, hydrogen sulfide, works at -95 degrees Fahrenheit.
Others have claimed to have invented a room-temperature superconductor in the past. Last year, two Indian scientists claimed to have made a room-temperature superconductor using particles of gold and silver. Other physicists are using pressurized lanthanum and hydrogen.

Why Quantum Computing's Time Is Now

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There are dozens of textbooks that cover an introduction of this topic. Michael Nielsen and Isaac Chuang authored Quantum Computation and Quantum Information back in 2000, which has been updated and is now in its third printing. This text has been used for both graduate and undergraduate courses.

Universities such as MIT, Caltech, Berkeley and UT Austin all have graduate and undergraduate courses specifically on quantum computing. While one can search to find locations where it is taught, it is not yet mainstream in computer science curricula. When it is offered, it is often as a special topics course. However, this is changing.

MIT x-Pro offers an excellent online introductory course to quantum computing taught by MIT quantum professors Isaac Chuang, Aram Harrow, William Oliver and Peter Shor.

Krysta Svore, leads the Quantum – Redmond (QuArC) group at Microsoft Research. She also teaches an undergraduate course entitled “Intro to Quantum Computing” at nearby University of Washington. She shared with me this week that she even has freshmen successfully taking the course.

D-wave posted on Twitter on Feb 21st showing pictures of an amazing 11-year old boy who attended their quantum programming class and programmed in Python a quantum program to solve the MAX 2-SAT, a classic optimization problem.
...
The NQIA authorizes $1.2 billion over five years for federal activities to increase investment in quantum information science, and specifically supporting the development of a quantum-smart workforce. The law also establishes a National Quantum Coordination Office and creates an advisory committee to advise the White House on quantum computing.

...

Entanglement and Complexity: Gravity and Quantum Mechanics

Professor Leonard Susskind describes how gravity and quantum information theory have come together to create a new way of thinking about physical systems. From fluid dynamics to strange metals, from black holes to the foundations of quantum mechanics, almost all areas of physics are being touched by the new paradigm.


The World As Hologram


Leonard Susskind of the Stanford Institute for Theoretical Physics discusses the indestructability of information and the nature of black holes in a lecture entitled The World As Hologram.



Neural Quantum States

How neural networks can solve highly complex problems in quantum mechanics


... Restricted Boltzmann Machines (RBMs), a simple type of artificial neural network, can be used to compute with extremely high accuracy the ground-state energy of quantum systems of many particles.


https://towardsdatascience.com/neural-quantum-states-4793fdf67b13


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Some trajectories of a harmonic oscillatoraccording to Newton's laws of classical mechanics(A–B), and according to the Schrödinger equation of quantum mechanics (C–H). In A–B, the particle (represented as a ball attached to a spring) oscillates back and forth. In C–H, some solutions to the Schrödinger Equation are shown, where the horizontal axis is position, and the vertical axis is the real part (blue) or imaginary part (red) of the wavefunction. C, D, E, F, but not G, H, are energy eigenstates. H is a coherent state—a quantum state that approximates the classical trajectory.

NOVA The Fabric of The Cosmos: Quantum Leap


Dynamics of the Wave Function: Heisenberg, Schrödinger, Collapse

http://www.science4all.org/article/dynamics-of-the-wave-function/

What does Schrödinger equation say?
Hummm… That’s a tough one. I have a lot of trouble making sense out of it. Here’s the best explanation I’ve come up with. At any position of space, a wave function has a particular energy which is deduced from its global structure. This local energy, also known as the Hamiltonian, is a composition of some potential energy which is due to external forces like electromagnetism, and some kinetic energy which depends on the superposition of momenta which makes up the wave function. What’s particularly weird about this kinetic energy is that it can have a complex value. Now, what Schrödinger equation says is that, at every position, the wave function rotates around the origin of the complex plane at a speed proportional to the Hamiltonian. This corresponds to the following formula:

The Mathematics of Quantum Computers


Heisenberg's Uncertainty Principle Explained


Quantum computing explained with a deck of cards


Simulations of quantum transport: Universal spreading laws confirmed

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The work deals with two of the most fundamental phenomena of condensed matter: interaction and disorder. Think about ultra-cold atomic gases. One atom from the gas is a quantum particle, and thus a quantum wave as well, which has both amplitude and phase. When such quantum particles, i.e. waves fail to propagate in a disordered medium, they get trapped and come to a complete halt. This destructive interference of propagating waves is Anderson localization.
Microscopic particles, described by quantum mechanics, interact when approaching each other. The presence of interaction, at least initially, destroys localization in a cloud of quantum particles, and allows the cloud to escape and smear out, though very slowly and subdiffusively. When atoms interact (collide) they exchange not only energy and momentum, but change their phases as well. The interaction destroys regular wave patterns, leading to the loss of the phase information. As time goes on the cloud spreads and thins out.
Hot debates over the past decade were devoted to the question whether the process will stop because the effective strength of interaction becomes too low, or not.

... quantum particles continue to spread even when particle to particle interactions originally deemed to be the activator of the spreading, exert almost no strength.

https://www.sciencedaily.com/releases/2019/02/190201114146.htm