Programmable heralded linear optical generation of two-qubit states
- URL: http://arxiv.org/abs/2204.08788v2
- Date: Fri, 1 Dec 2023 18:50:08 GMT
- Title: Programmable heralded linear optical generation of two-qubit states
- Authors: Suren A. Fldzhyan, Mikhail Yu. Saygin, Sergei P. Kulik
- Abstract summary: We have investigated the heralded generation of two-qubit dual-rail-encoded states by programmable linear optics.
Two types of schemes generating the states from four single photons, which is the minimal possible to accomplish the task, have been considered.
We infer that the linear optical schemes designed specifically for generation of two-qubit states are more efficient than schemes implementing gate-based circuits.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We have investigated the heralded generation of two-qubit dual-rail-encoded
states by programmable linear optics. Two types of schemes generating the
states from four single photons, which is the minimal possible to accomplish
the task, have been considered. The schemes have different detection patterns
heralding successful generation events, namely, one-mode heralding, in which
the two auxiliary photons are detected in one mode, and two-mode heralding, in
which single photons are detected in each of the two modes simultaneously. We
have shown that the dependence of the schemes' success probabilities on the
target state's degree of entanglement are essentially different. In particular,
one-mode heralding yields better efficiency for highly-entangled states, if the
programmable interferometers can explore the full space of the unitary transfer
matrices,. It is reversed in case of weakly-entangled states where two-mode
heralding is better. We have found a minimal decomposition of the scheme with
two-mode heralding that is programmed by one variable phase shift. We infer
that the linear optical schemes designed specifically for generation of
two-qubit states are more efficient than schemes implementing gate-based
circuits with known two-qubit linear optical gates. Our results yield
substantial reduction of physical resources needed to generate two-qubit
dual-rail-encoded photonic states.
Related papers
- Deterministic generation of a 20-qubit two-dimensional photonic cluster state [87.34681687753141]
We present a device capable of emitting large-scale entangled microwave photonic states in a two dimensional ladder structure.
By interleaving two-qubit gates with controlled photon emission, we generate 2 x n grids of time- and frequency-multiplexed cluster states of itinerant microwave photons.
We measure a signature of localizable entanglement across up to 20 photonic qubits.
arXiv Detail & Related papers (2024-09-10T16:25:24Z) - Wigner-negative states in the steady-state emission of a two-level system driven by squeezed light [0.0]
Propagating modes of light with negative-valued Wigner distributions are of fundamental interest in quantum optics.
We show the possibility of deterministic generation of Wigner-negativity in temporal modes of the steady-state emission of a two-level system driven by finite-bandwidth quadrature-squeezed light.
arXiv Detail & Related papers (2024-08-03T07:39:46Z) - Efficient High-Dimensional Entangled State Analyzer with Linear Optics [0.0]
We show how an efficient high-dimensional entangled state analyzer can be implemented with a linear optics interferometer and auxiliary photonic states.
The degree of entanglement of the auxiliary state is much less than in previous protocols as quantified by an exponentially smaller Schmidt rank.
This paves the way for experimental demonstrations with current hardware.
arXiv Detail & Related papers (2024-01-26T18:47:55Z) - Experimental realization of deterministic and selective photon addition
in a bosonic mode assisted by an ancillary qubit [50.591267188664666]
Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss.
Error correction requires a recovery operation that maps the error states -- which have opposite parity -- back onto the code states.
Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode.
arXiv Detail & Related papers (2022-12-22T23:32:21Z) - Regression of high dimensional angular momentum states of light [47.187609203210705]
We present an approach to reconstruct input OAM states from measurements of the spatial intensity distributions they produce.
We showcase our approach in a real photonic setup, generating up-to-four-dimensional OAM states through a quantum walk dynamics.
arXiv Detail & Related papers (2022-06-20T16:16:48Z) - Optimal qubit circuits for quantum-enhanced telescopes [0.0]
By using distributed entanglement, it is possible to eliminate the loss of stellar photons during transmission over the baselines.
The first protocol is a sequence of gates using nonlinear optical elements, optimized over all possible measurement schemes to saturate the Cram'er-Rao bound.
The second approach builds on an existing protocol, which encodes the time of arrival of the stellar photon into a quantum memory.
arXiv Detail & Related papers (2021-08-02T21:02:09Z) - Compact linear optical scheme for Bell state generation [0.0]
We report the most compact scheme producing the dual-rail-encoded Bell states out of four single photons.
Our scheme requires a five-mode interferometer and a single photon detector, while the previously known schemes use six-mode interferometers and two photon detectors.
arXiv Detail & Related papers (2021-05-13T14:01:32Z) - Superposition of two-mode squeezed states for quantum information
processing and quantum sensing [55.41644538483948]
We investigate superpositions of two-mode squeezed states (TMSSs)
TMSSs have potential applications to quantum information processing and quantum sensing.
arXiv Detail & Related papers (2021-02-01T18:09:01Z) - Rapid characterisation of linear-optical networks via PhaseLift [51.03305009278831]
Integrated photonics offers great phase-stability and can rely on the large scale manufacturability provided by the semiconductor industry.
New devices, based on such optical circuits, hold the promise of faster and energy-efficient computations in machine learning applications.
We present a novel technique to reconstruct the transfer matrix of linear optical networks.
arXiv Detail & Related papers (2020-10-01T16:04:22Z) - Hardware-Encoding Grid States in a Non-Reciprocal Superconducting
Circuit [62.997667081978825]
We present a circuit design composed of a non-reciprocal device and Josephson junctions whose ground space is doubly degenerate and the ground states are approximate codewords of the Gottesman-Kitaev-Preskill (GKP) code.
We find that the circuit is naturally protected against the common noise channels in superconducting circuits, such as charge and flux noise, implying that it can be used for passive quantum error correction.
arXiv Detail & Related papers (2020-02-18T16:45:09Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.