6 papers
Determining quantum coherence with minimal resources
Claudio Carmeli, Teiko Heinosaari, Sabrina Maniscalco +2
We characterize minimal measurement setups for validating the quantum coherence of an unknown quantum state. We show that for a -level system, the optimal strategy consists of m…
Number and phase: complementarity and joint measurement uncertainties
Pekka Lahti, Juha-Pekka Pellonpää, Jussi Schultz
We show that number and canonical phase (of a single mode optical field) are complementary observables. We also bound the measurement uncertainty region for their approximate joint…
Probing quantum state space: does one have to learn everything to learn something?
Claudio Carmeli, Teiko Heinosaari, Jussi Schultz +1
Determining the state of a quantum system is a consuming procedure. For this reason, whenever one is interested only in some particular property of a state, it would be desirable t…
Maximally symmetric stabilizer MUBs in even prime-power dimensions
Claudio Carmeli, Jussi Schultz, Alessandro Toigo
One way to construct a maximal set of mutually unbiased bases (MUBs) in a prime-power dimensional Hilbert space is by means of finite phase-space methods. MUBs obtained in this way…
Quantum incompatibility in collective measurements
Claudio Carmeli, Teiko Heinosaari, Daniel Reitzner +2
We study the compatibility (or joint measurability) of quantum observables in a setting where the experimenter has access to multiple copies of a given quantum system, rather than…
Efficient Pure State Quantum Tomography from Five Orthonormal Bases
Claudio Carmeli, Teiko Heinosaari, Michael Kech +2
For any finite dimensional Hilbert space, we construct explicitly five orthonormal bases such that the corresponding measurements allow for efficient tomography of an arbitrary pur…