INO
CNR
vai_a_storia   vai_a_organizzazione   vai_a_sedi   vai_a_personale   Area Riservata
    English English Version  
 
 

The entropic cost of quantum generalized measurements

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Mancino L., Sbroscia M., Roccia E., Gianani I., Somma F., Mataloni P., Paternostro M., Barbieri M

Affiliazione Autori:  [Mancino, Luca; Sbroscia, Marco; Roccia, Emanuele; Gianani, Ilaria; Somma, Fabrizia; Barbieri, Marco] Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy. [Mataloni, Paolo] Univ Roma La Sapienza, Dipartimento Fis, Quantum Opt Grp, Piazzale Aldo Moro 5, I-00185 Rome, Italy. [Paternostro, Mauro] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland. [Barbieri, Marco] CNR, Ist Nazl Ott, Largo E Fermi 6, I-50125 Florence, Italy.

Riassunto:  Landauer's principle introduces a symmetry between computational and physical processes: erasure of information, a logically irreversible operation, must be underlain by an irreversible transformation dissipating energy. Monitoring micro-and nano-systems needs to enter into the energetic balance of their control; hence, finding the ultimate limits is instrumental to the development of future thermal machines operating at the quantum level. We report on the experimental investigation of a lower bound to the irreversible entropy associated to generalized quantum measurements on a quantum bit. We adopted a quantum photonics gate to implement a device interpolating from the weakly disturbing to the fully invasive and maximally informative regime. Our experiment prompted us to introduce a bound taking into account both the classical result of the measurement and the outcoming quantum state; unlike previous investigation, our entropic bound is based uniquely on measurable quantities. Our results highlight what insights the information-theoretic approach provides on building blocks of quantum information processors.

Rivista/Giornale:  NPJ QUANTUM INFORMATION
Volume n.:  4      Pagine da: 20-1  a: 20-6
DOI: 10.1038/s41534-018-0069-z

   *Citazioni: 3
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

Riferimenti visionabili in IsiWeb of Knowledge: (solo per sottoscrittori)
Per visualizzare la scheda dell'articolo su IsiWeb: Clicca qui
Per visualizzare la scheda delle Citazioni dell'articolo su IsiWeb: Clicca qui

INO © Istituto Nazionale di Ottica - Largo Fermi 6, 50125 Firenze | Tel. 05523081 Fax 0552337755 - P.IVA 02118311006     P.E.C.    Info