76 citations · 371 across the 15 of their papers we have counts for
15 papers
Measuring the Mermin-Peres magic square using an online quantum computer
A. Dikme, N. Reichel, A. Laghaout +1
We have implemented the six series of three commuting measurement of the Mermin-Peres magic square on an online, five qubit, quantum computer. The magic square tests if the measure…
Two-photon interference from two blinking quantum emitters
Klaus D. Jöns, Katarina Stensson, Marcus Reindl +6
We investigate the effect of blinking on the two-photon interference measurement from two independent quantum emitters. We find that blinking significantly alters the statistics in…
Quantum metrology at the limit with extremal Majorana constellations
F. Bouchard, P. de la Hoz, G. Bjork +8
Quantum metrology allows for a tremendous boost in the accuracy of measurement of diverse physical parameters. The estimation of a rotation constitutes a remarkable example of this…
Quantum-polarization state tomography
Ömer Bayraktar, Marcin Swillo, Carlota Canalias +1
We propose and demonstrate a method for quantum-state tomography of qudits encoded in the quantum polarization of -photon states. This is achieved by distributing photons no…
Extremal quantum states and their Majorana constellations
G. Bjork, A. B. Klimov, P. de la Hoz +3
The characterization of quantum polarization of light requires knowledge of all the moments of the Stokes variables, which are appropriately encoded in the multipole expansion of t…
Optimal quantum tomography of permutationally invariant qubits
A. B. Klimov, G. Bjork, L. L. Sanchez-Soto
Mutually unbiased bases determine an optimal set of measurements to extract complete information about the quantum state of a system. However, quite often a priori information abou…
Deterministic teleportation using single-photon entanglement as a resource
Gunnar Björk, Amine Laghaout, Ulrik L. Andersen
We outline a proof that teleportation with a single particle is in principle just as reliable as with two particles. We thereby hope to dispel the skepticism surrounding single-pho…
Probing light polarization with the quantum Chernoff bound
Iulia Ghiu, Gunnar Bjork, Paulina Marian +1
We recall the framework of a consistent quantum description of polarization of light. Accordingly, the degree of polarization of a two-mode state of the quantum radiation…
On the efficiency of quantum lithography
Christian Kothe, Gunnar Björk, Shuichiro Inoue +1
Quantum lithography promises, in principle, unlimited feature resolution, independent of wavelength. However, in the literature at least two different theoretical descriptions of q…
Quantum degrees of polarization
G. Bjork, J. Soderholm, L. L. Sanchez-Soto +4
We discuss different proposals for the degree of polarization of quantum fields. The simplest approach, namely making a direct analogy with the classical description via the Stokes…
Complex multi-projective variety and entanglement
Hoshang Heydari, Gunnar Björk
In this paper, we will show that a vanishing generalized concurrence of a separable state can be seen as an algebraic variety called the Segre variety. This variety define a quadri…
Entanglement tensor for a general pure multipartite quantum state
Hoshang Heydari, Gunnar Björk
We propose an entanglement tensor to compute the entanglement of a general pure multipartite quantum state. We compare the ensuing tensor with the concurrence for bipartite state a…
Mutual first order coherence of phase-locked lasers
Hoshang Heydari, Gunnar Björk
We argue that (first-order) coherence is a relative, and not an absolute, property. It is shown how feedforward or feedback can be employed to make two (or more) lasers relatively…
Single-particle nonlocality and entanglement with the vacuum
G. Bjork, P. Jonsson, L. L. Sanchez-Soto
We propose a single-particle experiment that is equivalent to the conventional two-particle experiment used to demonstrate a violation of Bell's inequalities. Hence, we argue that…
An expectation value expansion of Hermitian operators in a discrete Hilbert space
Roberth Asplund, Gunnar Bjork, Mohamed Bourenanne
We discuss a real-valued expansion of any Hermitian operator defined in a Hilbert space of finite dimension N, where N is a prime number, or an integer power of a prime. The expans…