Predetection squeezing as a resource for high-dimensional Bell-state measurements
Bell measurements, entailing the projection onto one of the Bell states, play a key role in quantum information and communication, where the outcome of a variety of protocols crucially depends on the success probability of such measurements. Although in the case of qubit systems, Bell measurements c...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.023038 |
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| _version_ | 1850185764634099712 |
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| author | Luca Bianchi Carlo Marconi Jan Sperling Davide Bacco |
| author_facet | Luca Bianchi Carlo Marconi Jan Sperling Davide Bacco |
| author_sort | Luca Bianchi |
| collection | DOAJ |
| description | Bell measurements, entailing the projection onto one of the Bell states, play a key role in quantum information and communication, where the outcome of a variety of protocols crucially depends on the success probability of such measurements. Although in the case of qubit systems, Bell measurements can be implemented using only linear optical components, the same result is no longer true for qudits, where at least the use of ancillary photons is required. In order to circumvent this limitation, one possibility is to introduce nonlinear effects. In this work, we adopt the latter approach and propose a scalable Bell measurement scheme for high-dimensional states, exploiting multiple squeezer devices applied to a linear optical circuit for discriminating the different Bell states. Our approach does not require ancillary photons, is not limited by the dimension of the quantum states, and is experimentally scalable, thus paving the way toward the realization of an effective high-dimensional Bell measurement. |
| format | Article |
| id | doaj-art-619cc4accacc4d709fe4c565b8ddf26a |
| institution | OA Journals |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-619cc4accacc4d709fe4c565b8ddf26a2025-08-20T02:16:34ZengAmerican Physical SocietyPhysical Review Research2643-15642025-04-017202303810.1103/PhysRevResearch.7.023038Predetection squeezing as a resource for high-dimensional Bell-state measurementsLuca BianchiCarlo MarconiJan SperlingDavide BaccoBell measurements, entailing the projection onto one of the Bell states, play a key role in quantum information and communication, where the outcome of a variety of protocols crucially depends on the success probability of such measurements. Although in the case of qubit systems, Bell measurements can be implemented using only linear optical components, the same result is no longer true for qudits, where at least the use of ancillary photons is required. In order to circumvent this limitation, one possibility is to introduce nonlinear effects. In this work, we adopt the latter approach and propose a scalable Bell measurement scheme for high-dimensional states, exploiting multiple squeezer devices applied to a linear optical circuit for discriminating the different Bell states. Our approach does not require ancillary photons, is not limited by the dimension of the quantum states, and is experimentally scalable, thus paving the way toward the realization of an effective high-dimensional Bell measurement.http://doi.org/10.1103/PhysRevResearch.7.023038 |
| spellingShingle | Luca Bianchi Carlo Marconi Jan Sperling Davide Bacco Predetection squeezing as a resource for high-dimensional Bell-state measurements Physical Review Research |
| title | Predetection squeezing as a resource for high-dimensional Bell-state measurements |
| title_full | Predetection squeezing as a resource for high-dimensional Bell-state measurements |
| title_fullStr | Predetection squeezing as a resource for high-dimensional Bell-state measurements |
| title_full_unstemmed | Predetection squeezing as a resource for high-dimensional Bell-state measurements |
| title_short | Predetection squeezing as a resource for high-dimensional Bell-state measurements |
| title_sort | predetection squeezing as a resource for high dimensional bell state measurements |
| url | http://doi.org/10.1103/PhysRevResearch.7.023038 |
| work_keys_str_mv | AT lucabianchi predetectionsqueezingasaresourceforhighdimensionalbellstatemeasurements AT carlomarconi predetectionsqueezingasaresourceforhighdimensionalbellstatemeasurements AT jansperling predetectionsqueezingasaresourceforhighdimensionalbellstatemeasurements AT davidebacco predetectionsqueezingasaresourceforhighdimensionalbellstatemeasurements |