Research Repository

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Certification and quantification of multilevel quantum coherence (2018)
Journal Article
Ringbauer, M., Bromley, T. R., Cianciaruso, M., Lami, L., Lau, W. S., Adesso, G., …Piani, M. (2018). Certification and quantification of multilevel quantum coherence. Physical Review X, 8(4), doi:10.1103/physrevx.8.041007

Quantum coherence, present whenever a quantum system exists in a superposition of multiple classically distinct states, marks one of the fundamental departures from classical physics. Quantum coherence has recently been investigated rigorously within... Read More

Accessible bounds for general quantum resources (2018)
Journal Article
Bromley, T. R., Cianciaruso, M., Vourekas, S., Regula, B., & Adesso, G. (2018). Accessible bounds for general quantum resources. Journal of Physics A: Mathematical and Theoretical, 51(32), doi:10.1088/1751-8121/aacb4a. ISSN 1751-8113

The recent development of general quantum resource theories has given a sound basis for the quantification of useful quantum effects. Nevertheless, the evaluation of a resource measure can be highly non-trivial, involving an optimisation that is ofte... Read More

Converting multilevel nonclassicality into genuine multipartite entanglement (2018)
Journal Article
Regula, B., Piani, M., Cianciaruso, M., Bromley, T. R., Streltsov, A., & Adesso, G. (2018). Converting multilevel nonclassicality into genuine multipartite entanglement. New Journal of Physics, 20, doi:10.1088/1367-2630/aaae9d. ISSN 1367-2630

Characterizing genuine quantum resources and determining operational rules for their manipulation are crucial steps to appraise possibilities and limitations of quantum technologies. Two such key resources are nonclassicality, manifested as quantum s... Read More

Role of non-Markovianity and backflow of information in the speed of quantum evolution (2017)
Journal Article
Cianciaruso, M., Maniscalco, S., & Adesso, G. (2017). Role of non-Markovianity and backflow of information in the speed of quantum evolution. Physical Review A, 96(1), doi:10.1103/PhysRevA.96.012105. ISSN 2469-9926

We consider a two-level open quantum system undergoing pure dephasing, dissipative, or multiply decohering dynamics and show that whenever the dynamics is non-Markovian, the initial speed of evolution is a monotonic function of the relevant physical... Read More

Measures and applications of quantum correlations (2016)
Journal Article
Adesso, G., Bromley, T. R., & Cianciaruso, M. (2016). Measures and applications of quantum correlations. Journal of Physics A: Mathematical and Theoretical, 49(47), doi:10.1088/1751-8113/49/47/473001. ISSN 1751-8113

Quantum information theory is built upon the realisation that quantum resources like coherence and entanglement can be exploited for novel or enhanced ways of transmitting and manipulating information, such as quantum cryptography, teleportation, and... Read More

Accessible quantification of multiparticle entanglement (2016)
Journal Article
Cianciaruso, M., Bromley, T. R., & Adesso, G. (2016). Accessible quantification of multiparticle entanglement. npj Quantum Information, 2, doi:10.1038/npjqi.2016.30. ISSN 2056-6387

Entanglement is a key ingredient for quantum technologies and a fundamental signature of quantumness in a broad range of phenomena encompassing many-body physics, thermodynamics, cosmology and life sciences. For arbitrary multiparticle systems, entan... Read More

Observation of time-invariant coherence in a nuclear magnetic resonance quantum simulator (2016)
Journal Article
Silva, I. A., Souza, A. M., Bromley, T. R., Cianciaruso, M., Marx, R., Sarthour, R. S., …Adesso, G. (2016). Observation of time-invariant coherence in a nuclear magnetic resonance quantum simulator. Physical Review Letters, 117(16), doi:10.1103/PhysRevLett.117.160402. ISSN 0031-9007

The ability to live in coherent superpositions is a signature trait of quantum systems and constitutes an irreplaceable resource for quantum-enhanced technologies. However, decoherence effects usually destroy quantum superpositions. It has been recen... Read More

Generalized geometric quantum speed limits (2016)
Journal Article
Pires, D. P., Cianciaruso, M., Céleri, L. C., Adesso, G., & Soares-Pinto, D. O. (2016). Generalized geometric quantum speed limits. Physical Review X, 6, doi:10.1103/PhysRevX.6.021031. ISSN 2160-3308

The attempt to gain a theoretical understanding of the concept of time in quantum mechanics has triggered significant progress towards the search for faster and more efficient quantum technologies. One of such advances consists in the interpretation... Read More

Robustness of coherence: an operational and observable measure of quantum coherence (2016)
Journal Article
Napoli, C., Bromley, T. R., Cianciaruso, M., Piani, M., Johnston, N., & Adesso, G. (2016). Robustness of coherence: an operational and observable measure of quantum coherence. Physical Review Letters, 116, doi:10.1103/PhysRevLett.116.150502. ISSN 0031-9007

Quantifying coherence is an essential endeavour for both quantum foundations and quantum technologies. Here the robustness of coherence is defined and proven a full monotone in the context of the recently introduced resource theories of quantum coher... Read More

Robustness of asymmetry and coherence of quantum states (2016)
Journal Article
Piani, M., Cianciaruso, M., Bromley, T. R., Napoli, C., Johnston, N., & Adesso, G. (2016). Robustness of asymmetry and coherence of quantum states. Physical Review A, 93, doi:10.1103/PhysRevA.93.042107. ISSN 2469-9926

Quantum states may exhibit asymmetry with respect to the action of a given group. Such an asymmetry of states can be considered as a resource in applications such as quantum metrology, and it is a concept that encompasses quantum coherence as a speci... Read More