June 5, 2019

Irreversibility is a longstanding puzzle in physics. While microscopic laws of motion are invariant under time reversal, all macroscopic phenomena have a preferred direction in time. Heat, for instance, spontaneously flows from hot to cold. Eddington has called this as...

December 14, 2018

Quantum resources can improve communication complexity problems (CCPs) beyond their classical constraints. One quantum approach is to share entanglement and create correlations violating a Bell inequality, which can then assist classical communication. A second approac...

October 18, 2018

In the continuum from quantum to classical, there exists a paradox. Classical machines like heaters cannot run in reverse (and effectively act as refrigerators) without extra energy. Such a scenario would violate the second law of thermodynamics, which states that entr...

December 15, 2017

Dr  Tiago Batalhão (our  former  PhD  student) was  awarded the best thesis Grand Prize in Natural Sciences and Engineering 2017 afforded by CAPES and the Conrado Wessel Foundation (CWF). This is the most prestigious Brazilian Post-gr...

December 6, 2016

A new implementation of a Maxwell’s demon can control entropy production in a quantum-mechanical system that is driven out of thermal equilibrium. Maxwell’s demon explores the role of information in physical processes. Employing information about microscopic degrees of...

November 3, 2015

Entropy production, a quantity associated with the emergence of the arrow of time, has been successfully measured in a microscopic quantum system. Irreversibility is one of the most intriguing concepts in physics. While microscopic physical laws are perfectly reversibl...

November 2, 2015

Within the broad research scenario of quantum secure communication, two-way quantum-key-distribution (TWQKD) is a relatively new proposal for sharing secret keys that is not fully explored yet. We analyse the security of TWQKD schemes that use qubits prepared in non-or...

November 1, 2015

It is well known that a quantum correlated probe can yield better precision in estimating an unknown parameter than classically possible. However, how such a quantum probe should be measured remains somewhat elusive. We examine the role of measurements in quantum metro...

October 31, 2015

Highlighted as Editors’ Suggestion. Research on the out-of-equilibrium dynamics of quantum systems has so far produced important statements on the thermodynamics of small systems undergoing quantum mechanical evolutions. Key examples are provided by the Crooks and Jarz...

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Latest arXiv

Work-distribution quantumness and irreversibility when crossing a quantum phase transition in finite time, arXiv:1908.06488

Enhancing quantum transport efficiency by tuning non-Markovian dephasing, arXiv:1905.05784

Coherence effects in the performance of the quantum Otto heat engine, arXiv:1812.08728 

Pulse engineering for population control under dephasing and dissipation, arXiv:1808.07544

 

Investigating nonclassicality in nonlinear electronic spectroscopy, arXiv:1808.04427


Inducing non-trivial qubit coherence through a controlled dispersive environment,  arXiv:1807.11502

Work-induced constrained quantum dynamics, arXiv:1807.0437


Experimental characterization of a spin quantum heat engine, arXiv:1803.06021

Verifying Detailed Fluctuation Relations for Discrete Feedback Controlled Quantum Dynamics, arXiv:1802.07703

 

Role of quantum coherence in the thermodynamics of energy transfer,  arXiv:1802.06758

 

Reversing the direction of heat flow using quantum correlations, arXiv:1711.03323

 

DFT-inspired methods for quantum thermodynamics, arXiv:1703.02460

 

Transmission losses in optical qubits for controlled teleportation, arXiv:1701.06833

 

Energy transport in the presence of entanglement, arXiv:1701.04135

 

Coupled modes locally interacting with qubits: critical assessment of the rotating wave approximation, arXiv:1701.01104

 

Experimental rectification of entropy production by a Maxwell's Demon in a quantum system,  arXiv:1605.08821

 

Performance of dynamical decoupling in bosonic environments and under pulse-timing fluctuations, arXiv:1606.08776

 

Transport of correlations in a harmonic chain, arXiv:1605.02733

 

Non-equilibrium properties of trapped ions under sudden application of a laser, arXiv:1604.05732

 

Measurement of irreversible entropy production in mesoscopic quantum systems out of equilibrium, arXiv:1602.06958

 

Coupled Harmonic Systems as Quantum Buses in Thermal Environments, arXiv:1601.07528

 

Quantum thermodynamics and work fluctuations with applications to magnetic resonance, arXiv:1601.01833

 

Practical security analysis of two-way quantum key distribution protocols based on non-orthogonal states, arXiv:1507.08930

 

Irreversibility and the arrow of time in a quenched quantum system, arXiv:1502.06704

ABOUT US

The Quantum Information Science and Technology research group is part of the Federal University of ABC (UFABC), Santo André, São Paulo, Brazil. We are a very enthusiastic research group working in São Paulo metropolitan area.

 

We are interested in most aspects of quantum information science including theoretical and experimental investigations. For a good perspective of our interest please visit our research page. If you are interested in our recent contributions in the field, visit the publication page. Our mission is the exploration of new paths in the great adventure of scientific and technological progress in quantum information.

 

We are part of the joint initiative “Brazilian National Institute of Science and Technology for Quantum Information (INCT-IQ)”.

 

The cities in the university name:

A = Santo André; B = São Bernardo do Campo; C = São Caetano

UFABC

UFABC is a brand new Brazilian public university. Located in the industrial belt of São Paulo – Brazil’s largest city – in an area known as ABC. Founded in 2006, the UFABC already established a reputation for high-level interdisciplinary research and teaching, being top ranked in several aspects.

 

Interdisciplinarity – is a key concept at UFABC – has been discussed since the second half of the last century, when a strong need for redeeming the integrity of knowledge led to this approach, which consists of combining efforts from a variety of disciplines to deal with some scientific or technological problem.

 

Research and innovation are also another pillars of the university. The UFABC is considered, in several ranks, the most international university in Brazil. It is also the Brazilian university with bigger publication impact with roughly a quarter of the publications in the 10% more cited publications worldwide, according to the SIR World Report, from the Scimagoir rank.

 

See an article plubished in The Guardian (UK) about UFABC.