Optimized Entanglement Purification

Stefan Krastanov, Victor V. Albert, and Liang Jiang,

Quantum 3, 123 (2019).

We investigate novel protocols for entanglement purification of qubit Bell pairs. Employing genetic algorithms for the design of the purification circuit, we obtain shorter circuits achievin…

Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Zahra Baghali Khanian, and Andreas Winter,

Quantum 3, 121 (2019).

Thermodynamics and information have intricate interrelations. Often thermodynamics is considered to be the logical premise to justify that $\textit{information is physical}$ – through Landau…

Tomas Jochym-O’Connor,

Quantum 3, 120 (2019).

A method for the implementation of a universal set of fault-tolerant logical gates is presented using homological product codes. In particular, it is shown that one can fault-tolerantly map…

Thomas Hebdige and David Jennings,

Quantum 3, 119 (2019).

Recently a complete set of entropic conditions has been derived for the interconversion structure of states under quantum operations that respect a specified symmetry action, however the cor…

Andrea López-Incera, Pavel Sekatski, and Wolfgang Dür,

Quantum 3, 118 (2019).

We study the effect of local decoherence on arbitrary quantum states. Adapting techniques developed in quantum metrology, we show that the action of generic local noise processes –though ar…

Abel Molina,

Quantum 3, 117 (2019).

Performing perfect/conclusive quantum state exclusion means to be able to discard with certainty at least one out of $n$ possible quantum state preparations by performing a measurement of th…

Aidan Dang, Charles D. Hill, and Lloyd C. L. Hollenberg,

Quantum 3, 116 (2019).

We detail techniques to optimise high-level classical simulations of Shor's quantum factoring algorithm. Chief among these is to examine the entangling properties of the circuit and to effec…

Alba Cervera-Lierta,

Quantum 2, 114 (2018).

We present an exact simulation of a one-dimensional transverse Ising spin chain with a quantum computer. We construct an efficient quantum circuit that diagonalizes the Ising Hamiltonian and…

Gael Sentís, Johannes N. Greiner, Jiangwei Shang, Jens Siewert, and Matthias Kleinmann,

Quantum 2, 113 (2018).

Preparing and certifying bound entangled states in the laboratory is an intrinsically hard task, due to both the fact that they typically form narrow regions in state space, and that a certi…

Raul Corrêa, Marina F. B. Cenni, and Pablo L. Saldanha,

Quantum 2, 112 (2018).

We show that a quantum particle subjected to a positive force in one path of a Mach-Zehnder interferometer and a null force in the other path may receive a negative average momentum transfer…

Frédéric Bouchard, Khabat Heshami, Duncan England, Robert Fickler, Robert W. Boyd, Berthold-Georg Englert, Luis L. Sánchez-Soto, and Ebrahim Karimi,

Quantum 2, 111 (2018).

Quantum key distribution is on the verge of real world applications, where perfectly secure information can be distributed among multiple parties. Several quantum cryptographic protocols hav…

Francesco Albarelli, Matteo A. C. Rossi, Dario Tamascelli, and Marco G. Genoni,

Quantum 2, 110 (2018).

We study quantum frequency estimation for $N$ qubits subjected to independent Markovian noise, via strategies based on time-continuous monitoring of the environment. Both physical intuition…

Gian Luca Giorgi and Roberta Zambrini,

Quantum 2, 109 (2018).

Quantum coherence and distributed correlations among subparties are often considered as separate, although operationally linked to each other, properties of a quantum state. Here, we propose…