365 citations · 1.3k across the 12 of their papers we have counts for
6 papers · 1 filter
An exact effective two-qubit gate in a chain of three spins
Man-Hong Yung, Debbie W. Leung, Sougato Bose
We show that an effective two-qubit gate can be obtained from the free evolution of three spins in a chain with nearest neighbor XY coupling, without local manipulations. This gate…
Quantum computation by measurements
Debbie W. Leung
We first consider various methods for the indirect implementation of unitary gates. We apply these methods to rederive the universality of 4-qubit measurements based on a scheme mu…
Superdense coding of quantum states
Aram Harrow, Patrick Hayden, Debbie Leung
We describe a method to non-obliviously communicate a 2l-qubit quantum state by physically transmitting l+o(l) qubits of communication, and by consuming l ebits of entanglement and…
Randomizing quantum states: Constructions and applications
Patrick Hayden, Debbie Leung, Peter W. Shor +1
The construction of a perfectly secure private quantum channel in dimension d is known to require 2 log d shared random key bits between the sender and receiver. We show that if on…
Remote preparation of quantum states
Charles H. Bennett, Patrick Hayden, Debbie W. Leung +2
Remote state preparation is the variant of quantum state teleportation in which the sender knows the quantum state to be communicated. The original paper introducing teleportation…
Reversible simulation of bipartite product Hamiltonians
Andrew M. Childs, Debbie W. Leung, Guifre Vidal
Consider two quantum systems A and B interacting according to a product Hamiltonian H = H_A x H_B. We show that any two such Hamiltonians can be used to simulate each other reversi…