225 citations · 819 across the 25 of their papers we have counts for
27 papers
When Routes Run Out: Adversarial Co-Learning and Explainable Robustness in Quantum Repeater Networks
Brennan Bell, Inti Gabriel Mendoza Estrada, Andreas Trügler +1
We study an adversarial bandit problem for entanglement-based quantum-network routing over a modest graph corpus. Alice selects an end-to-end repeater route for an Ekert-91 protoco…
High-dimensional quantum communication with scalable photonic entanglement in time and frequency
Kai-Chi Chang, Murat Can Sarihan, Nicky Kai Hong Li +13
High-dimensional photonic entanglement holds significant promise for advancing quantum communication, computation, and metrology. For example, large-alphabet quantum communication…
Radio-Frequency Side-Channel Analysis of a Trapped-Ion Quantum Computer
Giorgio Grigolo, Dorian Schiffer, Lukas Gerster +2
Analogously to classical computers, quantum processors exhibit side channels that may give attackers access to potentially proprietary algorithms. We identify and exploit a previou…
Feedback-Induced Advantage in Quantum Clockworks
Jakob Miller, Paul Erker
Atomic frequency standards have achieved steadily increasing precision over the past seventy years, enabled in part by feedback mechanisms that stabilise their output. In parallel,…
Hardware-Agnostic Modeling of Quantum Side-Channel Leakage via Conditional Dynamics and Learning from Full Correlation Data
Brennan Bell, Andreas Trügler, Konstantin Beyer +1
We study a sequential coherent side-channel model in which an adversarial probe qubit interacts with a target qubit during a hidden gate sequence. Repeating the same hidden sequenc…
Bright Source of High-Dimensional Temporal Entanglement
Dorian Schiffer, Robert Kindler, Alexandra Bergmayr-Mann +5
High-dimensional entanglement is considered to hold great potential for quantum key distribution (QKD) in high-loss and -noise scenarios. To harness its robustness, we construct a…
Proposals for experimentally realizing quantum-autonomous gates
José Antonio Marín Guzmán, Yu-Xin Wang, Tom Manovitz +4
Autonomous quantum machines (AQMs) execute tasks without requiring time-dependent external control. Motivations for AQMs include the restrictions imposed by classical control on qu…
Quantum computing and artificial intelligence: status and perspectives
Giovanni Acampora, Andris Ambainis, Natalia Ares +36
This white paper discusses and explores the various points of intersection between quantum computing and artificial intelligence (AI). It describes how quantum computing could supp…
Roadmap on Quantum Thermodynamics
Steve Campbell, Irene D'Amico, Mario A. Ciampini +66
The last two decades has seen quantum thermodynamics become a well established field of research in its own right. In that time, it has demonstrated a remarkably broad applicabilit…
Entropic costs of extracting classical ticks from a quantum clock
Vivek Wadhia, Florian Meier, Federico Fedele +12
We experimentally realize a quantum clock by using a charge sensor to count charges tunneling through a double quantum dot (DQD). Individual tunneling events are used as the clock'…
Precision is not limited by the second law of thermodynamics
Florian Meier, Yuri Minoguchi, Simon Sundelin +4
Physical devices operating out of equilibrium are inherently affected by thermal fluctuations, limiting their operational precision. This issue is pronounced at microscopic and esp…
Autonomous Quantum Processing Unit: An Autonomous Thermal Computing Machine & its Physical Limitations
Florian Meier, Marcus Huber, Paul Erker +1
Computation is an input-output process, where a program encoding a problem to be solved is inserted into a machine that outputs a solution. Quantum computation conventionally relie…
Quantum Coding with Finite Thermodynamic Resources
Jake Xuereb, Tiago Debarba, Marcus Huber +1
Quantum direct coding or Schumacher compression generalised the ideas of Shannon theory, gave an operational meaning to the von Neumann entropy and established the term qubit. But…
Experimental high-dimensional entanglement certification and quantum steering with time-energy measurements
Kai-Chi Chang, Murat Can Sarihan, Paul Erker +8
High-dimensional entanglement provides unique ways of transcending the limitations of current approaches in quantum information processing, quantum communications based on qubits.…
Key Issues Review: Useful autonomous quantum machines
José Antonio Marín Guzmán, Paul Erker, Simone Gasparinetti +2
Controlled quantum machines have matured significantly. A natural next step is to increasingly grant them autonomy, freeing them from time-dependent external control. For example,…
The Impact of Imperfect Timekeeping on Quantum Control
Jake Xuereb, Florian Meier, Paul Erker +2
In order to unitarily evolve a quantum system, an agent requires knowledge of time, a parameter which no physical clock can ever perfectly characterise. In this letter, we study ho…
Fundamental accuracy-resolution trade-off for timekeeping devices
Florian Meier, Emanuel Schwarzhans, Paul Erker +1
From a thermodynamic point of view, all clocks are driven by irreversible processes. Additionally, one can use oscillatory systems to temporally modulate the thermodynamic flux tow…
Autonomous Temporal Probability Concentration: Clockworks and the Second Law of Thermodynamics
Emanuel Schwarzhans, Maximilian P. E. Lock, Paul Erker +2
According to thermodynamics, the inevitable increase of entropy allows the past to be distinguished from the future. From this perspective, any clock must incorporate an irreversib…
Measuring the thermodynamic cost of timekeeping
A. N. Pearson, Y. Guryanova, P. Erker +4
All clocks, in some form or another, use the evolution of nature towards higher entropy states to quantify the passage of time. Due to the statistical nature of the second law and…
Efficient generation of high-dimensional entanglement through multi-path downconversion
Xiao-Min Hu, Wen-Bo Xing, Bi-Heng Liu +5
High-dimensional entanglement promises to greatly enhance the performance of quantum communication and enable quantum advantages unreachable by qubit entanglement. One of the great…
Thermodynamically optimal creation of correlations
Faraj Bakhshinezhad, Fabien Clivaz, Giuseppe Vitagliano +4
Correlations lie at the heart of almost all scientific predictions. It is therefore of interest to ask whether there exist general limitations to the amount of correlations that ca…
Measurements in two bases are sufficient for certifying high-dimensional entanglement
Jessica Bavaresco, Natalia Herrera Valencia, Claude Klöckl +5
High-dimensional encoding of quantum information provides a promising method of transcending current limitations in quantum communication. One of the central challenges in the purs…
Autonomous quantum clocks: does thermodynamics limit our ability to measure time?
Paul Erker, Mark T. Mitchison, Ralph Silva +3
Time remains one of the least well understood concepts in physics, most notably in quantum mechanics. A central goal is to find the fundamental limits of measuring time. One of the…
Heisenberg-Weyl Observables: Bloch vectors in phase space
Ali Asadian, Paul Erker, Marcus Huber +1
We introduce a Hermitian generalization of Pauli matrices to higher dimensions which is based on Heisenberg-Weyl operators. The complete set of Heisenberg-Weyl observables allows u…