Showing 2022 · quant-phShow all

31 papers · 2 filters

quant-ph2022★ 3 cited

NISQ-ready community detection based on separation-node identification

Jonas Stein, Dominik Ott, Jonas Nüßlein +3

The analysis of network structure is essential to many scientific areas, ranging from biology to sociology. As the computational task of clustering these networks into partitions,…

quant-ph2022★ 9 cited

Near-optimal quantum circuit construction via Cartan decomposition

Maximilian Balthasar Mansky, Santiago Londoño Castillo, Victor Ramos Puigvert +1

We show the applicability of the Cartan decomposition of Lie algebras to quantum circuits. This approach can be used to synthesize circuits that can efficiently implement any desir…

quant-ph2022★ 1 cited

Correlation as a Resource in Unitary Quantum Measurements

Vishal Johnson, Ashmeet Singh, Reimar Leike +2

Quantum measurement is a physical process. What physical resources and constraints does quantum mechanics require for measurement to produce the classical world we observe? Treatin…

quant-ph2022★ 17 cited

Digital Quantum Simulation of the Spin-Boson Model under Open System Dynamics

Andreas Burger, Leong Chuan Kwek, Dario Poletti

Digital quantum computers have the potential to simulate complex quantum systems. The spin-boson model is one of such systems, used in disparate physical domains. Importantly, in a…

quant-ph2022★ 5 cited

Double-slit experiment revisited

Siddhant Das, Dirk-André Deckert, Leopold Kellers +2

The double-slit experiment is one of the quintessential quantum experiments. However, it tends to be overlooked that a theoretical account of this experiment requires the specifica…

quant-ph2022★ 1 cited

Quantum theories with local information flow

Eduarda Fonseca da Nova Cruz, David Möckli

Bell non-locality is a term that applies to specific modifications and interpretations of quantum mechanics. Yet, Bell's original 1964 theorem is often used to assert that unmodifi…

quant-ph2022★ 10 cited

Photons are lying about where they have been, again

Gregory Reznik, Carlotta Versmold, Jan Dziewior +5

Bhati and Arvind [Phys. Lett. A, 127955 (2022)] recently argued that in a specially designed experiment the timing of photon detection events demonstrates photon presence at a loca…

quant-ph2022★ 13 cited

A compiler for universal photonic quantum computers

Felix Zilk, Korbinian Staudacher, Tobias Guggemos +3

Photons are a natural resource in quantum information, and the last decade showed significant progress in high-quality single photon generation and detection. Furthermore, photonic…

quant-ph2022★ 7 cited

Epistemic-Pragmatist Interpretations of Quantum Mechanics: A Comparative Assessment

Ali Barzegar, Daniele Oriti

In this paper, we investigate similarities and differences between the main neo-Copenhagen (or "epistemic-pragmatist") interpretations of quantum mechanics, here identified as thos…

quant-ph2022★ 26 cited

Anatomy of Dynamical Quantum Phase Transitions

Maarten Van Damme, Jean-Yves Desaules, Zlatko Papić +1

Global quenches of quantum many-body models can give rise to periodic dynamical quantum phase transitions (DQPTs) directly connected to the zeros of a Landau order parameter (OP).…

quant-ph2022★ 161 cited

Advances in device-independent quantum key distribution

Víctor Zapatero, Tim van Leent, Rotem Arnon +4

Device-independent quantum key distribution (DI-QKD) provides the gold standard for secure key exchange. Not only it allows for information-theoretic security based on quantum mech…

quant-ph2022★ 22 cited

Why the Many-Worlds Interpretation?

Lev Vaidman

A brief (subjective) description of the state of the art of the many-worlds interpretation of quantum mechanics (MWI) is presented. It is argued that the MWI is the only interpreta…

quant-ph2022★ 2 cited

Boson sampling with ultracold atoms in a programmable optical lattice

Carsten Robens, Iñigo Arrazola, Wolfgang Alt +4

Sampling from a quantum distribution can be exponentially hard for classical computers and yet could be performed efficiently by a noisy intermediate-scale quantum device. A prime…

quant-ph2022★ 9 cited

Unsupervised Interpretable Learning of Phases From Many-Qubit Systems

Nicolas Sadoune, Giuliano Giudici, Ke Liu +1

Experimental progress in qubit manufacturing calls for the development of new theoretical tools to analyze quantum data. We show how an unsupervised machine-learning technique can…

quant-ph2022★ 6 cited

Valid and efficient entanglement verification with finite copies of a quantum state

Pawel Cieslinski, Jan Dziewior, Lukas Knips +5

Detecting entanglement in multipartite quantum states is an inherently probabilistic process, typically with a few measured samples. The level of confidence in entanglement detecti…

quant-ph2022★ 35 cited

Quantum Key Distribution with a Hand-held Sender Unit

Gwenaelle Vest, Peter Freiwang, Jannik Luhn +5

Quantum key distribution (QKD) is a crucial component for truly secure communication, which enables to analyze leakage of information due to eavesdropper attacks. While impressive…

quant-ph2022★ 14 cited

Projector formalism for kept and discarded spaces of matrix product states

Andreas Gleis, Jheng-Wei Li, Jan von Delft

Any matrix product state has a set of associated kept and discarded spaces, needed for the description of , and changes thereof, respectively. These induce a…

quant-ph2022★ 98 cited

A subwavelength atomic array switched by a single Rydberg atom

Kritsana Srakaew, Pascal Weckesser, Simon Hollerith +4

Enhancing light-matter coupling at the level of single quanta is essential for numerous applications in quantum science. The cooperative optical response of subwavelength atomic ar…

quant-ph2022★ 4 cited

Visualized Wave Mechanics by Coupled Macroscopic Pendula: Classical Analogue to Driven Quantum Bits

Heribert Lorenz, Sigmund Kohler, Anton Parafilo +2

Quantum mechanics increasingly penetrates modern technologies but, due to its non-deterministic nature seemingly contradicting our classical everyday world, our comprehension often…

quant-ph2022★ 63 cited

Quantum Speed Limit for States with a Bounded Energy Spectrum

Gal Ness, Andrea Alberti, Yoav Sagi

Quantum speed limits set the maximal pace of state evolution. Two well-known limits exist for a unitary time-independent Hamiltonian: the Mandelstam-Tamm and Margolus-Levitin bound…

quant-ph2022★ 28 cited

Quantum correlations in molecules: from quantum resourcing to chemical bonding

Lexin Ding, Stefan Knecht, Zoltán Zimborás +1

The second quantum revolution is all about exploiting the quantum nature of atoms and molecules to execute quantum information processing tasks. To support this growing endeavor an…

quant-ph2022

Time Evolution of a Decaying Quantum State: Evaluation and Onset of Non-Exponential Decay

Markus Nöth

The method developed by Van Dijk, Nogami and Toyama for obtaining the time-evolved wave function of a decaying quantum system is generalized to potentials and initial wave function…

quant-ph2022★ 25 cited

Trimer states with topological order in Rydberg atom arrays

Giacomo Giudice, Federica Maria Surace, Hannes Pichler +1

Trimers are defined as two adjacent edges on a graph. We study the quantum states obtained as equal-weight superpositions of all trimer coverings of a lattice, with the constraint…

quant-ph2022

Comment on the "Significance of Electromagnetic Potentials in the Quantum Theory"

Siddhant Das

A missing angle-dependent prefactor in the wave functions for half-integer magnetic flux obtained in [Y. Aharonov and D. Bohm, Phys. Rev. 115, 485 (1959)] is supplied, without whic…