Monthly Archives: July 2017

Toward optical quantum computing

Ordinarily, light particles — photons — don’t interact. If two photons collide in a vacuum, they simply pass through each other.

An efficient way to make photons interact could open new prospects for both classical optics and quantum computing, an experimental technology that promises large speedups on some types of calculations.

In recent years, physicists have enabled photon-photon interactions using atoms of rare elements cooled to very low temperatures.

But in the latest issue of Physical Review Letters, MIT researchers describe a new technique for enabling photon-photon interactions at room temperature, using a silicon crystal with distinctive patterns etched into it. In physics jargon, the crystal introduces “nonlinearities” into the transmission of an optical signal.

“All of these approaches that had atoms or atom-like particles require low temperatures and work over a narrow frequency band,” says Dirk Englund, an associate professor of electrical engineering and computer science at MIT and senior author on the new paper. “It’s been a holy grail to come up with methods to realize single-photon-level nonlinearities at room temperature under ambient conditions.”

Joining Englund on the paper are Hyeongrak Choi, a graduate student in electrical engineering and computer science, and Mikkel Heuck, who was a postdoc in Englund’s lab when the work was done and is now at the Technical University of Denmark.

Photonic independence

Quantum computers harness a strange physical property called “superposition,” in which a quantum particle can be said to inhabit two contradictory states at the same time. The spin, or magnetic orientation, of an electron, for instance, could be both up and down at the same time; the polarization of a photon could be both vertical and horizontal.

If a string of quantum bits — or qubits, the quantum analog of the bits in a classical computer — is in superposition, it can, in some sense, canvass multiple solutions to the same problem simultaneously, which is why quantum computers promise speedups.

Most experimental qubits use ions trapped in oscillating magnetic fields, superconducting circuits, or — like Englund’s own research — defects in the crystal structure of diamonds. With all these technologies, however, superpositions are difficult to maintain.

Because photons aren’t very susceptible to interactions with the environment, they’re great at maintaining superposition; but for the same reason, they’re difficult to control. And quantum computing depends on the ability to send control signals to the qubits.

That’s where the MIT researchers’ new work comes in. If a single photon enters their device, it will pass through unimpeded. But if two photons — in the right quantum states — try to enter the device, they’ll be reflected back.

The quantum state of one of the photons can thus be thought of as controlling the quantum state of the other. And quantum information theory has established that simple quantum “gates” of this type are all that is necessary to build a universal quantum computer.

Tips Uninstall MS-Office 2016

Microsoft Office is one of the most common suites of application, every computer user is using for home and business PC. The package includes MS Word, PowerPoint, Excel, Outlook, Access, Publisher and other applications. With time, Microsoft has launched various versions of MS Office. Every new version came up with some of the exciting features that enabled the users to do a number of tasks without any hassle and at the same platform. Today, you can install the MS Office on Windows OS, Mac OS or mobile phone.

Already using MS-Office 2016 but want to upgrade it to the latest version? For this, you need to uninstall the previously installed Office from your device (laptop, desktop or 2-in-1). You would also want to uninstall MS Office if there is some error in its working. However, to do so you don’t need to be a pro. This article will provide you the complete procedure for the same. Have a look:

  • The first step is to select your operating system
  • Download the Office uninstall tool, i.e. Microsoft Fix It
  • Run the Fix It and follow the on-screen instructions
  • Click “Apply this fix” and run the uninstaller for two minutes
  • Once it’s done, you will receive a message “The troubleshooter has successfully uninstalled MS Office”

The other method is to remove using MS Office 2016 from the Control Panel. Visit Control Panel, then select Add or Remove Program (Windows XP) or Programs and Features (Windows Vista and above). Find Microsoft Office 2016 from the list and click uninstall the program. Wait till the un-installation finishes and then reboot your system.

At any point of time, if you face an error in Office.com/SetupComputer Technology Articles, then contact Microsoft customer support professionals. The certified technicians will offer you a quick and reliable support and help you to uninstall the Microsoft Office Setup 2016.

Computer Hardware Firms Slip

Almost half of the computer hardware companies surveyed in a recent report had earnings returns that trailed even passbook savings accounts last year, according to an investment banking firm specializing in information technology company mergers.

The other side of the technology coin, information services companies-which include firms involved in software, publishing, printing and related supplies, marketing services, database and computer processing-fared better.

As a result, investors have fallen out of love with the high-tech hardware firms, once considered the darlings of Wall Street. The median market-price to book-value ratio was 1.4 to 1, the study found, which is about the same as representative cross-industry indexes. For information services companies, the ratio is 2.5 to 1.

Harvey Poppel, a partner at Broadview Associates, Ft. Lee, N.J., said his firm studied more than 463 publicly held U.S. information technology firms in both the hardware and information services sectors, with total revenues of more than $200 billion.

About 44 percent of the companies classified as computer and communications hardware firms had returns on equity of less than 5 percent. The median return was 6.5 percent. Hardware distribution and retail companies outpaced the manufacturing end, averaging about an 8 percent return.

The information services companies, however, averaged 15 percent returns, which is above the traditional 11 percent average for all U.S. companies, according to Poppel. The Standard & Poor`s average for all U.S. companies has not yet been released for 1987.

Among the information services companies, software products companies performed the worst, showing some of the same volatility as the hardware group, the study found.

“This is the worst performance for the hardware companies in the four years that we`ve been tracking these kind of results,“ he said. “For the previous two years, when the average was in the 7 to 8 percent range, we blamed it on the computer slump. But 1987 growth rates were pretty good.“

Revenue growth for hardware companies averaged 10 percent over the previous year. Not including International Business Machines Corp., revenues were up 14 percent.

“The turnaround is here, but the profits still aren`t,“ Poppel said.

One of the major handicaps faced by computer hardware makers is that their products, which have very high research and development costs, have short life cycles, Poppel said. In addition, most of these companies are involved in a global marketplace, and have suffered from Asian price slashing and consumers` continued expectations of yearly price and performance improvements. Services companies face few of these problems.

GeIL Releases EVO SPEAR DDR4 Hardcore Memory

GeIL – Golden Emperor International Ltd. – one of the world’s leading PC components & peripheral manufacturers announced the latest DDR4 hardcore gaming memory modules, EVO SPEAR Series, and EVO SPEAR AMD Edition Series. Available as single modules and kits up to 64GB, runs as low as 1.2V and at max 1.35V resulting in less power consumption and higher reliability. Featuring a stylish and stealthy standard-height heat spreader, EVO SPEAR Series modules can be used in most case designs including SFF (Small Form Factor) systems and full-sized gaming PCs. The EVO SPEAR Series and EVO SPEAR AMD Edition Series are available in black with a black PCB and are perfect for gamers and enthusiasts who want a cost-efficient upgrade for faster gaming, video editing, and 3D rendering.

EVO SPEAR Series available in 2133MHz to 3466MHz frequencies, optimized for the Intel® Core™ X, i7, i5 Processors as well as Z200 and X299 Series Chipset.

EVO SPEAR AMD Edition Series fully compatible with the latest AMD Ryzen 7, Ryzen 5 Processors and AM4 Motherboards. Available in 2133MHz to 3200MHz frequencies.

“EVO SPEAR Series, and EVO SPEAR AMD Edition Series are ideal for gamers, enthusiasts, and case modders looking to maximize gaming performance with minimum investment.” – says Jennifer Huang, the Vice President of GeIL.