Superposing compass states for asymptotic isotropic sub-Planck phase-space sensitivity
Compass states deliver a sub-Planck phase-space structure in the sense that sensitivity to
phase-space displacement is superior to the sensitivity of displacing the vacuum state in any …
phase-space displacement is superior to the sensitivity of displacing the vacuum state in any …
Sub-Planck phase-space structure and sensitivity for SU (1, 1) compass states
We investigate the sub-Planck-scale structures associated with the SU (1, 1) group by
establishing that the Planck scale on the hyperbolic plane can be considered as the inverse …
establishing that the Planck scale on the hyperbolic plane can be considered as the inverse …
Seeding Gaussian boson samplers with single photons for enhanced state generation
Non-Gaussian quantum states are crucial to fault-tolerant quantum computation with
continuous-variable systems. Usually, generation of such states involves trade-offs between …
continuous-variable systems. Usually, generation of such states involves trade-offs between …
How squeezed states both maximize and minimize the same notion of quantumness
Beam splitters are routinely used for generating entanglement between modes in the optical
and microwave domains, requiring input states that are not convex combinations of coherent …
and microwave domains, requiring input states that are not convex combinations of coherent …
Sub-Planck structures and sensitivity of the superposed photon-added or photon-subtracted squeezed-vacuum states
The Wigner function of the compass state (a superposition of four coherent states) develops
phase-space structures of dimension much less than the Planck scale ℏ, which are crucial in …
phase-space structures of dimension much less than the Planck scale ℏ, which are crucial in …
Quantum walk on the Bloch sphere
L Duan - Physical Review A, 2022 - APS
A scheme for implementing the discrete-time quantum walk on the Bloch sphere is
proposed, which is closely related to the SU (2) group. A spin cluster serves as the walker …
proposed, which is closely related to the SU (2) group. A spin cluster serves as the walker …
Quantum scissor from exact generalized photon number statistics
We report the close form expressions of the photon number statistics for a generalized
coherent state and a generalized photon-added coherent state, which are shown to be …
coherent state and a generalized photon-added coherent state, which are shown to be …
Compasslike states in a thermal reservoir and fragility of their nonclassical features
Superposed photon-added and photon-subtracted squeezed-vacuum states exhibit sub-
Planck phase-space structures and metrological potential similar to the original compass …
Planck phase-space structures and metrological potential similar to the original compass …
Engineering entangled Schrödinger cat states of separated cavity modes in cavity QED
We provide a scheme by utilizing a two-cavity setup to generate useful quantum
mechanically entangled states of two cavity fields, which themselves are prepared in …
mechanically entangled states of two cavity fields, which themselves are prepared in …
Quantum sensitivity of a photon-added molecular wave packet
We study the temporal dynamics of a photon-added SU (2) coherent state, involving
vibrational bound states of an iodine molecule. The nonclassicality of Schrödinger cat-like …
vibrational bound states of an iodine molecule. The nonclassicality of Schrödinger cat-like …