Papers

A. Roy, A. Stone, Liang Jiang·Jun 3, 2016

Remote entanglement of distant, noninteracting quantum entities is a key primitive for quantum information processing. We present a protocol to remotely entangle two stationary qubits by first entangling them with propagating ancilla qubits and then ...

M. Hinarejos, M. Bañuls, Armando P'erez +1 more·Jun 3, 2016

We explore in a rigorous manner the intuitive connection between the non-Markovianity of the evolution of an open quantum system and the performance of the system as a quantum memory. Using the paradigmatic case of a two-level open quantum system cou...

T. Xin, J. S. Pedernales, L. Lamata +2 more·Jun 2, 2016

We measure multi-time correlation functions of a set of Pauli operators on a two-level system, which can be used to retrieve its associated linear response functions. The two-level system is an effective spin constructed from the nuclear spins of 1H ...

Yannick Seis, Benjamin J. Brown, A. Sørensen +1 more·May 31, 2016

The high-fidelity storage of quantum information is crucial for quantum computation and communication. Many experimental platforms for these applications exhibit highly biased noise, with good resilience to spin depolarisation undermined by high deph...

Hoi-Kwan Lau, M. Plenio·May 30, 2016

Implementing a qubit quantum computer in continuous-variable systems conventionally requires the engineering of specific interactions according to the encoding basis states. In this work, we present a unified formalism to conduct universal quantum co...

Xi-Lin Wang, Luo-Kan Chen, Wei Li +16 more·May 27, 2016

We report the first experimental demonstration of quantum entanglement among ten spatially separated single photons. A near-optimal entangled photon-pair source was developed with simultaneously a source brightness of ∼12  MHz/W, a collection efficie...

Alexander Ulanov, D. Sychev, A. A. Pushkina +2 more·May 27, 2016

The transfer of quantum information between physical systems of a different nature is a central matter in quantum technologies. Particularly challenging is the transfer between discrete and continuous degrees of freedom of various harmonic oscillator...

M. Epping, H. Kampermann, D. Bruß·May 26, 2016

Many protocols of quantum information processing, like quantum key distribution or measurement-based quantum computation, ‘consume’ entangled quantum states during their execution. When participants are located at distant sites, these resource states...

R. Blume-Kohout, J. Gamble, E. Nielsen +4 more·May 24, 2016

Quantum information processors promise fast algorithms for problems inaccessible to classical computers. But since qubits are noisy and error-prone, they will depend on fault-tolerant quantum error correction (FTQEC) to compute reliably. Quantum erro...

Daniel J. Lum, J. Howell, M. S. Allman +5 more·May 20, 2016

Shannon proved in 1949 that information-theoretic-secure encryption is possible if the encryption key is used only once, is random, and is at least as long as the message itself. Notwithstanding, when information is encoded in a quantum system, the p...

S. Devitt·May 18, 2016

Quantum computing technology has reached a second renaissance in the past five years. Increased interest from both the private and public sector combined with extraordinary theoretical and experimental progress has solidified this technology as a maj...

C. Lai, Yicong Zheng, T. Brun·May 18, 2016

Stabilizer states are extensively studied in quantum information theory for their structures based on the Pauli group. Calderbank-Shor-Steane (CSS) stabilizer states are of particular importance in their application to fault-tolerant quantum computat...

B. Hacker, S. Welte, G. Rempe +1 more·May 17, 2016

That two photons pass each other undisturbed in free space is ideal for the faithful transmission of information, but prohibits an interaction between the photons. Such an interaction is, however, required for a plethora of applications in optical qu...

B. Ndagano, Benjamin Perez-Garcia, F. Roux +7 more·May 17, 2016

High-dimensional entanglement with spatial modes of light promises increased security and information capacity over quantum channels. Unfortunately, entanglement decays due to perturbations, corrupting quantum links which cannot be repaired without a...

Yang Liu, Zhu Cao, Cheng Wu +13 more·May 13, 2016

Classical correlation can be locked via quantum means: quantum data locking. With a short secret key, one can lock an exponentially large amount of information in order to make it inaccessible to unauthorized users without the key. Quantum data locki...

J. Salfi, Mengyang Tong, S. Rogge +1 more·May 11, 2016

The states of a boron acceptor near a Si/SiO2 interface, which bind two low-energy Kramers pairs, have exceptional properties for encoding quantum information and, with the aid of strain, both heavy hole and light hole-based spin qubits can be design...

Armin Rahmani, B. Seradjeh, M. Franz·May 11, 2016

In topological quantum computing, unitary operations on qubits are performed by adiabatic braiding of non-Abelian quasiparticles, such as Majorana zero modes, and are protected from local environmental perturbations. In the adiabatic regime, with tim...

J. Renes·May 4, 2016

The uncertainty principle can be understood as constraining the probability of winning a game in which Alice measures one of two conjugate observables, such as position or momentum, on a system provided by Bob, and he is to guess the outcome. Two var...

G. Dvali, César Gómez, D. Lüst +2 more·May 4, 2016

By analyzing the key properties of black holes from the point of view of quantum information, we derive a model‐independent picture of black hole quantum computing. It has been noticed that this picture exhibits striking similarities with quantum cri...

R. Namiki, Liang Jiang, Jungsang Kim +1 more·May 2, 2016

We investigate a quantum repeater scheme for quantum key distribution based on the work by Muralidharan et al., Phys. Rev. Lett. 112, 250501 (2014). Our scheme extends that work by making use of error syndrome measurement outcomes available at the re...