Wisconsin Alumni Research Foundation

Technology

Controlling Superconducting Quantum Circuits

In the exciting field of quantum computation, the performance of quantum bits (‘qubits’) is advancing rapidly. Among several implementations currently being pursued, superconductor-based circuits ...
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Robert McDermott, Maxim Vavilov | P140260US01

Technology

Simplified Optical Traps for Quantum Computing

Quantum computing is expected to revolutionize the field of computation and provide major improvements for optimization, modeling and cryptography. Over the course of decades, different methods to mak...
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Mark Saffman | P190053US01

Technology

Memory Processing Unit Boosts Performance, Cuts Energy Usage

A significant amount of time and power is spent waiting for processors to retrieve instructions and data from distant levels of memory. One approach to mitigate access latency (delay) is to use a thre...
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Karthikeyan Sankaralingam, Jaikrishnan Menon, Lorenzo De Carli | P140414US01

Technology

Virtual Touch Screens: New Input for Smaller Devices

As mobile devices become smaller, touch screen inputs have remain largely unchanged. But the use of the display as an input surface can become a problem as the user’s finger obstructs increasingly l...
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Xinyu Zhang, Chi Zhang, Joshua Tabor, Jialiang Zhang | P160021US01

Technology

Increasing Memory Bandwidth

Modern computer processors can process data faster than the data can be exchanged with external memory. For this reason there is considerable interest in boosting the ‘bandwidth’ of the memory bus...
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Nam Sung Kim, Hao Wang | P140155US01

Technology

Memory Controller for Heterogeneous Processors

Many modern computers employ multiple processor types, for example, one or more conventional CPUs operating in tandem with specialized GPUs, the latter tailored to high-speed streaming processing. T...
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Nam Sung Kim, Hao Wang | P140398US01

Technology

New Hardware Helps Cell Phones, Tablets Save Power

Energy efficiency is important in mobile electronics such as smart phones and tablets because of their size and reliance on battery power. At the same time, these kinds of devices must perform increas...
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Nam Sung Kim, Srinivasan Narayanamoorthy | P140276US01

Technology

Improving Memory Access in Asymmetric Memories

In computer memory there is a tradeoff between capacity (how much data can be stored) and latency (how quickly it can be accessed). To achieve a balance, typical memory systems employ a hierarchy of d...
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Nam Sung Kim, Hao Wang | P150172US01

Technology

Managing Memory in Virtualized Computer Systems

Computer programs access memory using virtual addresses, which are translated by hardware into unique physical addresses that locate the data in the cache or memory. The set of virtual addresses acces...
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Mark Hill, Michael Swift, Jayneel Gandhi | P150108US01

Technology

Qubit Measurement System Is Efficient, Scalable

In the field of quantum computing, the performance of quantum bits (‘qubits’) has advanced rapidly in recent years. A truly scalable system requires the ability to rapidly and accurately m...
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Robert McDermott, Frank Wilhelm-Mauch, Britton Plourde, Maxim Vavilov, Luke Govia, Emily Pritchett | P140246US01

Technology

Improved Gate Design for Quantum Computers

Some extremely complex tasks – like sorting very large databases or factoring large numbers – are challenging for classical computers. Quantum computers can solve such problems because they use qu...
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Mark Eriksson, John Gamble, Daniel Ward, Susan Coppersmith, Mark Friesen | P130184US02

Technology

Computer Accelerator System Boosts Efficiency

Hardware accelerators improve computer performance by allowing the main processor to off-load certain tasks, for example, processing floating-point or graphics calculations. The accelerator is designe...
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Karthikeyan Sankaralingam, Chen-Han Ho, Sung Kim | P140164US01

Technology

Managing Computer Power and Performance

Energy consumption is a major constraint in computer design because of factors like power costs, operating life and heat. The tradeoff between energy consumption and performance is managed to some deg...
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David Wood, Rathijit Sen | P140071US01

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