99 citations · 391 across the 15 of their papers we have counts for
14 papers · 1 filter
Control and enhancement of interferometric coupling between two photonic qubits
R. Stárek, M. Mičuda, I. Straka +4
We theoretically investigate and experimentally demonstrate a procedure for conditional control and enhancement of an interferometric coupling between two qubits encoded into state…
Experimental replication of single-qubit quantum phase gates
M. Mičuda, R. Stárek, I. Straka +4
We experimentally demonstrate the underlying physical mechanism of the recently proposed protocol for superreplication of quantum phase gates [W. Dür, P. Sekatski, and M. Skotiniot…
Quantum Non-Gaussian Multiphoton Light
Ivo Straka, Lukáš Lachman, Josef Hloušek +4
We propose an experimental method of recognizing quantum non-Gaussian multiphoton states. This is a native quantum property of Fock states, the fundamental quantum states with a co…
Experimental demonstration of a fully inseparable quantum state with nonlocalizable entanglement
M. Mičuda, D. Koutný, M. Miková +3
Localizability of entanglement in fully inseparable states is a key ingredient of assisted quantum information protocols as well as measurement-based models of quantum computing. W…
Experimental characterization of a non-local convertor for quantum photonic networks
Michal Mičuda, Robert Stárek, Petr Marek +6
We experimentally characterize a quantum photonic gate that is capable of converting multiqubit entangled states while acting only on two qubits. It is an important tool in large q…
Faithful quantum state transfer between weakly coupled qubits
Martina Miková, Ivo Straka, Michal Mičuda +5
One of the strengths of quantum information theory is that it can treat quantum states without referring to their particular physical representation. In principle, quantum states c…
Conditional cooling limit for a quantum channel going through an incoherent environment
Ivo Straka, Martina Miková, Michal Mičuda +3
We propose and experimentally verify a cooling limit for a quantum channel going through an incoherent environment. The environment consists of a large number of independent non-in…
Optimal entanglement-assisted discrimination of quantum measurements
M. Mikova, M. Sedlak, I. Straka +5
We investigate optimal discrimination between two projective single-qubit measurements in a scenario where the measurement can be performed only once. We consider general setting i…
Quantum non-Gaussian Depth of Single-Photon States
Ivo Straka, Ana Predojević, Tobias Huber +8
We introduce and experimentally explore the concept of quantum non-Gaussian depth of single-photon states with a positive Wigner function. The depth measures the robustness of a si…
Efficient experimental estimation of fidelity of linear optical quantum Toffoli gate
Michal Micuda, Michal Sedlak, Ivo Straka +4
We propose an efficiently measurable lower bound on quantum process fidelity of N-qubit controlled-Z gates. This bound is determined by average output state fidelities for N partia…
Qubit carriers with internal degrees of freedom in a non-factorable state
Martina Mikova, Helena Fikerova, Ivo Straka +4
We have studied how the quality of transfer of a qubit state depends on distinguishability of internal states of the particles carrying qubits. The transfer is implemented without…
Noiseless loss suppression in quantum optical communication
Michal Micuda, Ivo Straka, Martina Mikova +4
We propose a protocol for conditional suppression of losses in direct quantum state transmission over a lossy quantum channel. The method works by noiselessly attenuating the input…
Increasing efficiency of a linear-optical quantum gate using an electronic feed forward
Martina Mikova, Helena Fikerova, Ivo Straka +3
We have successfully used a fast electronic feed forward to increase the success probability of a linear optical implementation of a programmable phase gate from 25% to its theoret…
Experimental implementation of unambiguous quantum reading
Michele Dall'Arno, Alessandro Bisio, Giacomo Mauro D'Ariano +3
We provide the optimal strategy for unambiguous quantum reading of optical memories, namely when perfect retrieving of information is achieved probabilistically, for the case where…