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Sebastian Deffner

Sebastian Deffner

Assistant Professor of Physics, University of Maryland, Baltimore County

Quantum thermodynamics is a newly emerging field of modern research, which has recently attracted more and more activity. Although classical thermodynamics and quantum mechanics were developed side by side in the beginning of the twentieth century the thermodynamic description of quantum systems has only recently become a major topic of modern research. This development has been spurred by the discovery of novel and fundamental generalizations of the second law of thermodynamics explicitly accounting for non-equilibrium fluctuations. These so-called fluctuation theorems changed the conventional focus of thermodynamics on work and heat to the study of entropy production -- a concept more accessible in quantum systems. To this end, three main avenues of research have been pursued: identifying fundamental notions of entropy and information production in quantum systems, studying the thermodynamics of information processing, and analyzing optimal quantum processes. As a theoretical physicist, I employ tools from Statistical Physics, Open Quantum Dynamics, Quantum Information Theory, Quantum Optics, Condensed Matter Theory and Optimal Control Theory to investigate the nonequilibrium properties of nanosystems operating far from thermal equilibrium.

Quantum speed limit may put brakes on quantum computers

Jan 12, 2018 05:52 am UTC| Insights & Views Technology

Over the past five decades, standard computer processors have gotten increasingly faster. In recent years, however, the limits to that technology have become clear: Chip components can only get so small, and be packed only...

Static electricity's tiny sparks

Jan 06, 2017 04:33 am UTC| Science

Static electricity is a ubiquitous part of everyday life. Its all around us, sometimes funny and obvious, as when it makes your hair stand on end, sometimes hidden and useful, as when harnessed by the electronics in your...

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Economy

Renminbi Series: China’s impossible trilemma returns to haunt

Impossible Trinity/Trilemma is an economic concept which suggests that a country cant all the three following at the same time; a fixed foreign exchange rate, free capital movement, and an independent monetary policy. And...

U.S. 2-year Treasury yield overtakes Tuesday’s high following hawkish comments from Fed Chair Powell

The U.S. 2-year Treasury yield on Wednesday, broke yesterdays high of 2.619 percent, albeit remaining flat at the time of writing, reaching a days high of 2.624 percent. In the overnight session, bond yields experienced a...

UK 10-year gilt yield slumps to 1-1/2 month low after June consumer inflation fails to meet market expectations

The United Kingdoms 10-year gilt yield slumped to 1-1/2 month low during European session Wednesday after the countrys consumer price inflation (CPI) for the month of June failed to meet market expectations. Investors will...

U.S.’ net foreign demand for long-term securities weakens in May; impact of trade rhetoric to watch out for

The United States net foreign purchases of long-term securities slowed in May, although foreign private institutions are still willing buyers of U.S. Treasury and corporate debt. Foreign official institutions remained net...

U.S. under Trump Series: U.S. services could fall victim of trade war

Despite market optimism being reflected through the stock market rise, the trade war initiated by the U.S. President Donald Trump continues under the rug. Since President Trump announced 25 percent tariffs on all steel...

Politics

Poland's judicial purge another step toward authoritarian democracy

Since the elections of 2015, Poland has been ruled by the Law and Justice Party (Prawo i Sprawiedliwość, or PiS), a far-right nationalist group that has transformed the country beyond recognition. Poland had once been...

Arrest and release of Somaliland poet puts spotlight on regional troubles

Poets, writers and bloggers have recently been on the receiving end of political crackdowns in the self-declared independent state of Somaliland. Surges often occur around elections, and most recently due to assertive...

The Murri Book Club and the politics of reading for Indigenous Australians

Although the 2018 Closing the Gap report on Indigenous disadvantage highlighted the importance of literacy for Indigenous Australians, progress remains slow. But, while reading is widely considered an unmitigated good and...

Brexiteers outmanoeuvred at Chequers as Theresa May corrals her cabinet to agree Brexit plan

On his first visit to the prime ministers country retreat at Chequers, the Liberal Democrat minister David Laws was reminded of the setting for an Agatha Christie film, where most of the guests would be murdered. Six years...

Is Indonesia retreating from democracy?

This is an edited extract from Tim Lindseys essay Retreat from Democracy, which appears in Australian Foreign Affairs #3, published 9 July. For much of the past 20 years, Indonesia has been held up as a model of...

Science

Long live the Europe of scientists!

This article is published as part of the EuroScience Open Festival (ESOF), of which The Conversation France is a partner. Since its inception, the European project has benefitted citizens from all walks of life in every...

Discovering dopamine's role in the brain: Arvid Carlsson's important legacy

Arvid Carlsson, the Swedish neuroscientist and Nobel laureate, died on June 29, 2018 at the age of 95. He had devoted his life to understanding how the brain works and was awarded the Nobel for his research into dopamine ...

How Novichok is different from radioactive poisons – and what this means for decontamination

A man and a woman were found unconscious in Wiltshire, England, on July, after having been exposed to the nerve agent Novichok. This is the same substance that was used to poison the former Russian spy Sergei Skripal and...

We need a bank of DNA from dirt and water to protect Australia's environment

Measuring biodiversity used to mean laboriously collecting samples and manually identifying the plants, animals and fungi. This might involve careful inspection under a microscope to spot identifying features. This takes a...

Curious Kids: Where do black holes lead to?

This is an article from Curious Kids, a series for children. The Conversation is asking kids to send in questions theyd like an expert to answer. All questions are welcome serious, weird or wacky! You might also like...

Technology

IBM Partners with Stronghold to Deliver Stable Coin Backed by FDIC Dollars

IBM recently dived into the cryptocurrency movement as well, backing stable coin Stronghold USD, which currently holds Federal Deposit Insurance Corporation-insured U.S. Dollars. IBMs partner, Stronghold, was able to...

Bitcoin’s Value Up by $600 in Just 30 Minutes; Cryptocurrency Now Trading Above $7,000

Bitcoin has now broken free of the bearish trend that kept it below $7,000 in recent weeks. The leading cryptocurrency in the world exploded today as its value shot up by $600 in just 30 minutes, Coindesk reported. This...

'PUBG' Latest News and Updates: Much-Requested Custom Matches Finally Getting an Open Beta

In an update on Steam, Player Unknowns Battlegrounds (PUBG) has released information about an upcoming feature which allows players to now create their own custom matches. As of this articles posting, the new custom...

Samsung Galaxy Tab S4 Release Date, Specs: LTE-Enabled Tablet Appears in Chinese Regulatory Filing; Other Features Leaked

More clues hint that the South Korean electronics giant is working on releasing the Samsung Galaxy Tab S4 this year. Recently, a regulatory filing supposedly for the said tablet was spotted while another report revealed...

Binance Successfully Compensates Users After Syscoin Incident

Binance, the largest crypto exchange firm in the world by trading volume, announced that it has now successfully transferred the rebates that it promised its users, Etherum World News reported. The compensation was due to...
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July 18 15:30 UTC Released

BRForeign Exchange Flows

Actual

3.823 Bln USD

Forecast

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July 18 14:30 UTC Released

USEIA Weekly Gasoline O/P

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-0.407 M

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January 31 00:00 UTC 243005243005m

ARAnnual Primary Balance*

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2016 bln ARS

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2016 bln ARS

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January 22 19:00 UTC 254825254825m

ARTrade Balance

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-1541 %

January 31 00:00 UTC 243005243005m

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2016 bln ARS

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Bln AR bln ARS

January 22 19:00 UTC 254825254825m

ARTrade Balance

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-1541 %

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2016 bln ARS

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Bln AR bln ARS

January 31 00:00 UTC 243005243005m

ARAnnual Primary Balance*

Actual

Forecast

2016 bln ARS

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