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- Vittorio Giovannetti, S Guha, Seth Lloyd, Lorenzo Maccone, Jeffrey H. Shapiro, Horace P. Yuen
- Physical review letters
- 2004

The classical capacity of the lossy bosonic channel is calculated exactly. It is shown that its Holevo information is not superadditive, and that a coherent-state encoding achieves capacity. Theâ€¦ (More)

- Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
- Science
- 2004

Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurement. Conventional measurement techniques typically fail to reach these limits. Conventionalâ€¦ (More)

- Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
- Physical review letters
- 2006

We point out a general framework that encompasses most cases in which quantum effects enable an increase in precision when estimating a parameter (quantum metrology). The typical quantum precisionâ€¦ (More)

- Si-Hui Tan, Baris I. Erkmen, +5 authors Jeffrey H. Shapiro
- Physical review letters
- 2008

An optical transmitter irradiates a target region containing a bright thermal-noise bath in which a low-reflectivity object might be embedded. The light received from this region is used to decideâ€¦ (More)

A quantum channel can be characterized by a completely positive(CP) linear superoperator on the Hilbert space of the information carrier. In general this evolution is not unitary, so that a pureâ€¦ (More)

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made thisâ€¦ (More)

- Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
- Physical review letters
- 2008

A random access memory (RAM) uses n bits to randomly address N=2(n) distinct memory cells. A quantum random access memory (QRAM) uses n qubits to address any quantum superposition of N memory cells.â€¦ (More)

We define thermodynamic configurations and identify two primitives of discrete quantum processes between configurations for which heat and work can be defined in a natural way. This allows us toâ€¦ (More)

- Andrea Mari, Vittorio Giovannetti, Alexander S. Holevo
- Nature communications
- 2014

Quantum communication theory explores the implications of quantum mechanics to the tasks of information transmission. Many physical channels can be formally described as quantum Gaussian operationsâ€¦ (More)

- Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
- Physical review letters
- 2008

We propose a cheat sensitive quantum protocol to perform a private search on a classical database which is efficient in terms of communication complexity. It allows a user to retrieve an item fromâ€¦ (More)