8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Polish Academy of SciencesPL234 papers
- Institute of Molecular Physics of the Polish Academy of SciencesPL159 papers
- Centre National de la Recherche ScientifiqueFR113 papers
- University of MichiganUS94 papers
- RIKENJP89 papers
- European Southern ObservatoryCL83 papers
- Palacký University OlomoucCZ77 papers
- University of EdinburghGB74 papers
- Nicolaus Copernicus Astronomical CenterPL73 papers
- Royal ObservatoryGB73 papers
- University of WarsawPL72 papers
- Institute of PhysicsPL68 papers
14 papers · 2 filters
Multi-Bloch Vector Representation of the Qutrit
Pawel Kurzynski
An ability to describe quantum states directly by average values of measurement outcomes is provided by the Bloch vector. For an informationally complete set of measurements one ca…
Constructive counterexamples to additivity of minimum output Rényi entropy of quantum channels for all p>2
Andrzej Grudka, Michał Horodecki, Łukasz Pankowski
We present a constructive example of violation of additivity of minimum output Rényi entropy for each p>2. The example is provided by antisymmetric subspace of a suitable dimension…
Qubit-induced phonon blockade as a signature of quantum behavior in nanomechanical resonators
Yu-xi Liu, Adam Miranowicz, Y. B. Gao +3
The observation of quantized nanomechanical oscillations by detecting femtometer-scale displacements is a significant challenge for experimentalists. We propose that phonon blockad…
Sudden vanishing of spin squeezing under decoherence
Xiaoguang Wang, Adam Miranowicz, Yu-xi Liu +2
In order to witness multipartite correlations beyond pairwise entanglement, spin-squeezing parameters are analytically calculated for a spin ensemble in a collective initial state…
Self-Correcting Quantum Computers
H. Bombin, R. W. Chhajlany, M. Horodecki +1
Is the notion of a quantum computer resilient to thermal noise unphysical? We address this question from a constructive perspective and show that local quantum Hamiltonian models p…
Nonadditivity of quantum and classical capacities for entanglement breaking multiple-access channels and butterfly network
Andrzej Grudka, Pawel Horodecki
We analyze quantum network primitives which are entanglement-breaking. We show superadditivity of quantum and classical capacity regions for quantum multiple-access channel and qua…
Optimal mirror phase-covariant cloning
Karol Bartkiewicz, Adam Miranowicz, Şahin Kaya Özdemir
We propose a quantum cloning machine, which clones a qubit into two clones assuming known modulus of expectation value of Pauli Z-matrix. The process is referred to as the mirror p…
Wigner function non-classicality as indicator of quantum chaos
A. Kowalewska-Kudłaszyk, J. K. Kalaga, W. Leoński
We propose a Wigner function based parameter that can be used as an indicator of quantum chaos. This parameter is defined as "entropy" from the time-dependence of "non-classicallit…
Sudden Death and Birth of Entanglement Effects for Kerr-Nonlinear Coupler
A. Kowalewska-Kudłaszyk, W. Leoński
We analyse the entanglement dynamics in a nonlinear Kerr-like coupler interacting with external environment. Whenever the reservoir is in a thermal vacuum state the entanglement (m…
Long-time fidelity and chaos for a kicked nonlinear oscillator system
A. Kowalewska-Kudłaszyk, J. K. Kalaga, W. Leoński
We deal with a system comprising a nonlinear (Kerr-like) oscillator excited by a series of ultra-short external pulses. We introduce the fidelity-based entropic parameter that can…
Mutually Unbiased Bases and Complementary Spin 1 Observables
Pawel Kurzynski, Wawrzyniec Kaszub, Mikolaj Czechlewski
The two observables are complementary if they cannot be measured simultaneously, however they become maximally complementary if their eigenstates are mutually unbiased. Only then t…
Quantum superadditivity in linear optics networks: sending bits via multiple access Gaussian channels
L. Czekaj, J. K. Korbicz, R. W. Chhajlany +1
We study classical capacity regions of quantum Gaussian multiple access channels (MAC). In classical variants of such channels, whilst some capacity superadditivity-type effects su…
High-fidelity atomic-state teleportation protocol with non-maximally-entangled states
Grzegorz Chimczak, Ryszard Tanaś
We propose a protocol of the long-distance atomic state teleportation via cavity decay, which allows for high-fidelity teleportation even with currently available optical cavities.…
Perfect function transfer and interference effects in interacting boson lattices
Lian-Ao Wu, Adam Miranowicz, XiangBin Wang +2
We show how to perfectly transfer, without state initialization and remote collaboration, arbitrary functions in interacting boson lattices. We describe a possible implementation o…